Forklift rocker and bolts

A direct result of poor seal off the engine burning Lpg Gas Forklift oil or petrol filling quality of impurities, then the valve is even more serious and the formation of coke and faster. Because carbon sponge-like structure, when the valve after the formation of coke fuel injected into the cylinder for each part will have to be adsorbed, so that the real concentration of the mixture into the cylinder thinning, resulting in difficulty in starting the engine idle shake, emergency fuel back fire, resulting in excessive exhaust blockage triples, increased fuel consumption and other phenomena.

Valve coke

Coke can cause severe valve closed lax, the cylinder and the cylinder pressure because there is no completely does not work, even blocking the valve so that it does not return. At this valve and piston movement will produce interference, and ultimately damage the engine.
Oil pump strainer is easily clogged coke after filter clogging can cause malfunction due to the low oil pressure light. The following figure shows the oil pump strainer on carbon has been covered, although it is easy to manually remove these carbon deposits, but also for dismantling.

Oil pump chain

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Select models and configurations based on Conditions

Select models and configurations generally proceed from the following aspects:
(1) Job Function
Forklift basic job functions are divided into levels of handling, stacking / pick up, loading / unloading, sorting. Can be determined from the initial models described above to be achieved in accordance with corporate job functions. In addition, the special operations capabilities will affect the specific configuration of the truck, such as handling the rolls, hot metal, etc., need Lpg Gas Forklift Truck attachments to complete the installation of special features.
(2) operational requirements
Job requirements include pallet truck or cargo specifications, generally require a high degree of upgrading, operating channel width, climbing, etc., but also need to consider the operating efficiency (the efficiency of different models differ), work habits (such as driving or stop driving habits sit), etc. requirements.
(3) operating environment
If the cargo handling business needs or warehouse environment on environmental noise or exhaust emissions is required, select models and configurations should be considered in. If it is in cold storage or in explosion-proof requirements of the environment, the configuration of the truck should be cold or explosion-proof type. Carefully inspect the truck when jobs need to go through the place, the problem might imagine, for example, out of storage when the door of the truck is a high impact; and out of the elevator, the height and the impact on the truck bearing; when the upstairs work, floor hosts whether the relevant requirements, and so on.
In the selection and determine the configuration, would like a detailed description of the off road rough terrain forklift supplier working conditions, and site surveys to ensure full compliance with the purchase of the truck needs of enterprises. Even if the above steps to complete the analysis, there may be several models while still satisfying the above requirements. At this point, note the following aspects:
① different models, different efficiency, the number of trucks required, the number of different drivers, will lead to a series of changes in costs, as detailed in this article about the performance evaluation section discusses costs.
② If the

High Mast Diesel Forklift

 in the warehouse operations, different models of different channel width required to enhance the ability to have differences, which will bring about changes in the layout of the warehouse, such as cargo storage volume changes.
③ and changes in the number of models, fleet management and other aspects will have an impact.
④ different models in different market holdings, its after-sales support capabilities are different, for example: the low three-stacking forklift driving and driving three high stacking forklift truck series belong to the narrow channel, can be in a very narrow channel (1.5 ~ 2.0 m) complete palletizing, pick up. But the former can not raise the cab, thus less operating vision, low work efficiency. Since the latter can be completely covered by the former function, and the performance is more superior, and therefore beyond the four to five times the sales in the European market, the latter than the former, in China reached more than 6 times. So most vendors have focused development three high stacking forklift driver, while the low three-stacking forklift driver only used in small-tonnage, low lift height (generally less than 6 meters) of the condition. Few sales in the market, the number of its service engineers, engineers experience, parts inventory level of service capabilities will be relatively weak.
After going to a comprehensive assessment of the impact of the above aspects, the selection of the most reasonable option.

Forklift owners must see with terrible consequences of low-grade oil

Related to the use of fully synthetic electric forklift trucks engine oil and mineral oil advantages and disadvantages of different opinions, some say owners are easy to use fully synthetic, and some say the total synthesis has not imagined so good. Leaving aside the fully synthetic engine oil for the superiority of the engine, we first look at the long-term use of low-grade mineral oil and the consequences of not using antifreeze tank.

This is a Beverly 8V 1.4 dismantling the electrical forklift engine, the original owners of long-term use of oil as well as tens of dollars to use water as a radiator coolant, and long-term urban low speed, plus the maintenance cycle irregular lead less than 10 kilometers Wan last engine overhaul.

The engine has been completely disassembled

Carbon formation

The vast majority of vehicles currently on the market are already engine electronic fuel injection control, cylinder fuel injection works by first re-ignition at low speeds due to incomplete combustion, spewing gasoline can not be recovered, only to be attached the intake valve and combustion chamber walls, gasoline is likely to be volatile, but gasoline has stayed wax and varnish, wax and varnish long run piled thick, after repeated heating hardens to form a coke .

Wheel Driving Diesel Forklift engine crankshaft

Because long-term use of low-quality gasoline, oil, maintenance cycles are irregular and low speed main cause of carbon deposition.

Pistons coke

For the carbon on the piston is very easy to remove, but because of the piston continues to work, carbon is also very easy to longevity. By raising the speed of the shift can reduce the formation of coke, but can not be avoided. Like the picture on carbon through some sort of maintenance supplies additives have been difficult to remove.

Forklift by type, brand to buy the book

Forklift plays a very important role in the enterprise's logistics system, is the main force in the material handling equipment. Especially with the rapid development of China's economy, most enterprises have been out of the raw material handling manual handling, forklift instead is based mechanized handling. Thus, in the past few years, the demand for Chinese forklift market are at double-digit annual growth rate.
Currently on the market to choose from truck brands, models of complex, coupled with strong technology and the product itself is very professional, so the choice of models, vendor selection is a lot to buy companies often face. This paper introduces the model selection, brand selection, performance criteria and other aspects.
First, the model selection
Industry needs models and configurations.
1. Vehicle Classification
Forklift usually be divided into three categories: internal combustion forklifts, electric forklifts and warehouse trucks.
(1) internal combustion forklifts
Internal combustion forklifts are divided into ordinary internal combustion forklifts, heavy trucks, container trucks and sides of the truck.
① ordinary internal combustion Lpg Gas Forklift
Generally use diesel, petrol, LPG or natural gas engine as power, load capacity of 1.2 to 8.0 tons, the operating channel width is generally 3.5 to 5.0 m, taking into account the emissions and noise problems, usually outdoors, workshop or other for exhaust emissions and noise do not require special places. Due to convenient refueling, it can achieve long continuous operation, and competent (such as rain) to work in harsh environments.
② Forklift Trucks
A diesel engine as power, load capacity from 10.0 to 52.0 tons, generally used for heavier cargo terminals, steel and other industries outdoor jobs.
③ Container Handler
A diesel engine as power, load capacity from 8.0 to 45.0 tons, is generally divided into empty forklift, heavy container forklift and reachstacker. Applied to container handling, such as container yard or port terminal operations.
④ Sideloader
A diesel engine as power, load capacity of 3.0 to 6.0 tons. Without turning, with the ability to take the goods directly from the side of the fork, and therefore mainly used fork to take a long bar goods, such as wood, steel and so on.
(2) electric forklift
Electric motor powered, battery energy. Carrying capacity of 1.0 to 4.8 tons, the operating channel width is generally 3.5 to 5.0 m. Since there is no pollution, noise, it is widely used for environmental demanding conditions, such as medicine, food and other industries. Since each cell is generally about eight hours at work needs to be charged, so for multi-shift working condition with battery backup.
(3) warehouse Wheel Driving Diesel Forklift
Warehouse forklift mainly for cargo handling and warehouse forklift design. Apart from a few warehouse forklift (such as manual pallet truck) is the use of human-driven, others are driven by an electric motor, because the body is compact, mobile and flexible, light weight and good environmental performance and have been widely used in the storage industry. When multi-shift operation, the motor-driven warehouse forklift battery backup needed.

The selection of forklift

1. Select the truck model

Select the most important factor to consider their applications forklift and warehouse real situation, if the truck for loading and unloading trailers, that front-wheel drive, ride rider gas powered forklift trucks more appropriate. If the shuttle truck for loading and unloading cargo to the trailer, a factor to consider is "free lift" problem, that is, under the premise of not elevated mast, fork can be raised. Warehouse roadway width is another issue to consider when choosing the truck, three car truck requires 10ft (1ft = 0.304? 8m) wide roadway, four-wheel trucks require more space for 12 ~ 13ft wide roadway. In a more narrow roadway, users prefer Reach truck, which is equipped with a tray back outriggers can be operated at about 8ft wide roadway.

2.Capacity
The purchase of factors must be considered when the Lpg Gas Forklift. Proposed purchase of a larger capacity than usual forklift required. If you want to lift the forklift pallet load is 900KG, then choose 1300KG capacity forklift appropriate. When handling flammable or hazardous materials purchased forklift, users must check their level of security. If the truck is marked with E logo, sparking phenomenon may occur; if the truck is marked with EE logo, is equipped with many safety devices; the safest level is EX, said the truck did not cause ignition of such metal parts. In short, more secure than diesel forklift trucks EX level, specifically designed for safe diesel forklift marked with DX logo.

3.Price PK efficiency

Forklift price is only one factor, as important as the ability to price and vehicle spare parts and maintenance services itself. Recommends that users consider the truck "life" of the total cost, not just the purchase price.

Most experts are against buying used off road rough terrain forklift, unless it is used to do the work of the auxiliary equipment supplies. If you only need a forklift, you can buy used forklifts, but be sure to confirm the quality standards,

Therefore, the user should consider the efficiency of the truck, manufacturers will need support and the number of various forklifts. For savvy users, long-term and short-term interests should be taken into account.

The best choice for forklift LPG gas system configuration

We have contacted many international forklift industry experts, analysts believe they think LPG forklift is currently the world's most cost-effective promotional value of cleaner internal combustion all terrain forklifts, especially for the cities and logistics industry. If China continues down the fuel tax, gasoline and diesel and liquefied petroleum gas will become increasingly significant difference; the risk of future oil price rise is a user needs to be considered, if the liquefied petroleum gas prices relatively more competitive. China's current fuel tax policy implementation is the inhibition of the truck just use ordinary oil the most effective means of conventional fuels (such as diesel, gasoline). From the developed situation, different fuel tax policy led directly to the huge difference in consumption structure forklift industry: the widespread use of high fuel taxes in Europe and Japan, new energy vehicles - LPG and electric forklift trucks account for a very high proportion. And in the United States to implement the high fuel tax, consumption tends to LPG forklift is very obvious. States regulate fuel tax policy is the most important means of domestic road and non-road vehicles consumption structure.
Fuel tax policy is an important way to implement the national energy strategy, to curb the excessive growth of oil consumption, improve energy efficiency and irreplaceable role. Fuel tax policy will inevitably lead to a major shift in the orientation of the consumer group Lpg Gas Forklift Truck, LPG forklift will be the main beneficiaries. After the implementation of fuel tax reform, logistics and customer industries due to the use of a forklift heavy cargo stacking tasks, costs a lot of pressure, which requires the purchase of logistics enterprises and scientific models to minimize costs, have higher efficiency. Therefore, the introduction of fuel tax will also encourage these companies to save oil costs some effort. Finally, as China increasingly standardize and improve the country's environmental regulations, LPG forklift sales is bound to play a significant catalytic role, making the rapid development of LPG forklifts in China appeared. The careful selection of liquefied gas forklift truck OEM OEM systems will play a decisive role.

What to buy the truck to pay attention?

1. Operating environment

This is the purchase of the truck primary consideration, outdoor or indoor operation. If forklifts for warehouse outside, to choose gas, liquid petroleum or diesel powered internal combustion engine type Wheel Driving Diesel Forklift ; if the truck is mainly working in the outdoor cold environment, then gasoline-powered forklift is the most reasonable choice. It is worth noting, diesel forklifts should be kept in use, turn off the engine can not always; every few minutes if the user initiates a truck , it will damage the truck ; another suggestion, diesel truck engine oil should be changed regularly.

Another type of truck is mainly designed for outdoor operation, the liquid petroleum - also known as LP-driven, and gasoline fuel type forklift for the market. LP forklift suitable for both indoor and suitable for outdoor use because it is smaller than gasoline exhaust toxicity. LP forklifts and diesel High Mast Diesel Forklift fuel costs are almost the same, but the diesel forklift less maintenance costs. In cold conditions, the user sometimes LP forklift assembly protective cover or heater; if this does not guarantee the truck running, then the LP truck into a gasoline truck is also very easy.

Outdoor environment not only determines the selection of the internal combustion engine, for the use of the tire type is also required. Pneumatic tire suitable for rough terrain; free inflatable tires are suitable for outdoor flat and hard ground, and most indoor applications.

2. indoor warehouse Diesel Rough Terrain Forklift Truck

For indoor handling, such as in warehouses, electric forklifts advantage. And internal combustion forklifts compared to its main advantage is low noise, no pollution. Although electric forklift price than internal combustion forklifts high, but lower operating costs. Electric forklifts are the main reasons for saving money without fuel, there is no need to replace oil and classes of components such as plug and socket. Electric forklift maintenance costs for the normal life cycle, the hour only 2 yuan to 6 yuan (a forklift running one shift a day, about the use of 1700h per year). The use of electric forklift battery must always pay attention to the case, check the water level and avoid battery kill.

LPG forklift

Chinese domestic LPG forklift sales is not high, some manufacturers do not concern forklift host this area, while others well-known companies are at the forefront of High Mast Diesel Forklift industry, they followed the trend of top international truck companies, used by the US company IMPCO conversion means the proportion of successful development of a mixer LPG / CNG trucks, after 10 years of sales feedback, superior matching performance, reliable quality and high security. US IMPCO company is the world's leading manufacturer of LPG forklift device, LPG forklift equipment products occupy 80% of the world 2001 truck in the world's top 10 companies have applied forklift. US IMPCO Technologies for product made the United States the most authoritative UL certification (UL certification mark are all key parts), the worldwide machine sales unimpeded.
In contrast, domestic gas business gas system in order to adopt low-cost short-term strategy to seize the truck market, and both are using the simple structure of the venturi tube acts as a mixer with the forklift use, very easily lead to temper accident. Behind the accident, not only failed to improve the LPG forklift applications, but to restrict the user's enthusiasm; at the same time destroying the prospects of their application in the 2 Ton Diesel Forklift Truck industry. So the difference Venturi and IMPCO's proportion between the mixer where? Why can not energy-efficient products are used improperly, it will cause an accident happen?
The reason is: designed for car use early carburetor venturi mixer because of its simple structure, can not accurately control the air-fuel ratio, the truck must end customers often commissioning, start difficulties, gas economy particularly bad, but not only did not saving fuel. At the same time due to the venturi structure is an open valve, no locking function, there will be no security features. Due to the low speed of the forklift, and internal air flow hood low, sealing higher than cars, tempering occurs easily lead to vehicle fire accident. However, due to the venturi purchase cost is very low, and in many cases without the knowledge of the truck OEMs, some domestic gas with a tacit way of supporting businesses, forced match in the entire system, to earn excess profits.

Summer use and proper maintenance forklift maintenance

2 Ton Diesel Forklift Truck , is a specialist in industrial goods on pallets into pieces wheeled transport vehicle loading and unloading, stacking and short-distance transport operations, widely used in ports, airports, factories and warehouses where the workshop, with high efficiency, low cost High reliability and convenient service and many other advantages, the use of good and safeguard the truck will not only extend the life also can greatly improve efficiency.

Truck in the course pay attention to safety procedures, general reference to the safe operation of forklifts manuals, in addition to go through professional training to their posts. Try to slow down in the course of the speed of mechanical parts damage.

First, to protect the quality of the quality of the mechanical parts of facilities, to prevent all kinds of debris into the mechanical operation of the site, in order to protect the Wheel Driving Diesel Forklift parts clean. In the event of failure, try to go to a regular professional maintenance repair shop.

Besides, now that the summer temperatures rise, high-temperature mechanical operation is easy to bring failure. Construction machinery in use should pay attention to clean parts, reduce dust and ensure smooth mechanical ventilation. Identify problems immediately stop using and even troubleshooting, should not lose because of the small and large.

Again, forklifts reduce the impact of chemical corrosion of machinery in operation, the focus is to prevent rain and airborne chemical composition on mechanical intrusion. Staff can take appropriate measures depending on the circumstances.

Reminded again Diesel Rough Terrain Forklift Truck users not to overload the job, so wear parts damaged will be slower.

Forklift engine test

Overall, in addition to the vibration of the engine itself, the flexible connection is stronger than hard-wired; vibration, soft connection test points remaining to be much smaller than hard-wired. And vibration soft connection, but also more stable than hard-wired from the waveform view, there is a hard-wired vibration cycle.

     Can be seen from the waveform, engine vibration soft connection to swing around the main engine support structure can be further optimized, increasing the intensity of shock absorbing lateral direction.

Acceleration sensor on the phone, and more for the games, to feel the mobile phone's status, and make the appropriate control of the game. Although it is impossible and professional laboratory instruments compared to the level of the acceleration sensor, but for a rough measurement of somatosensory vibration similar construction machinery, should be enough. In fact several acceleration sensors, a data acquisition card, plus a spectrum analyzer or similar Labview software costs only less than 10 million.

     Vibration analysis of this paper is only a rough measure of the magnitude and direction of acceleration, if supplemented by spectral analysis, but also to analyze more results. For example, to find out the main parts of the resonance vibration point, targeted to reduce the machine vibration and noise; for example, to find out the abnormal sound transmission, especially in electric Wheel Driving Diesel Forklift gearbox abnormal sound sound source, and so on. Domestic forklift industry, research on vibration testing is not the effort, but with the driving comfort of the user constantly demanding, research in this area will eventually get attention.

Forklift outer door frame structure improvements

Off road forklifts job, always long and high-frequency withstand large loads, so the strength of the door frame assembly in particular played a key role in demanding the outer door frame.

1. The general structure of the outer door frame assembly

General assembly of the outer door frame structure shown in Figure 1. Square box structure is more complex, the back door frame assembly welding deformation of large, need to eliminate welding stress and secondary correction. The beams 1 and 3 under the crossbar processing complex, the production process is longer, and the need mold manufacturing, higher production costs, especially in the size of a beam sack difficult to guarantee in the actual production, the need to correct the processing is completed. To this end, the decision on the original outer door frame general improvements.

Figure 1

2. The new structure of the outer door frame assembly

New outer mast assembly structure shown in Figure 2. Square box structure is relatively simple, the door frame assembly of welding deformation is small, proper control can meet the requirements, no correction, and when the sack is easy to control the size of the beams b actual production.

Common type gantry tilt between the cylinder bearing seat and Huff vertical distance 450 mm, the new outer door frame relatively common type of outer door frame its Hough seat down, tilt between the cylinder bearing and bearing Huff vertical distance of 600 mm, and therefore the new mast in front, after tilting mast outside force state significantly improved.

Figure 2

3. Two outer door frame intensity contrast

After High Mast Diesel Forklift computer simulation experiments, the two kinds of the outer door frame assembly structural strength comparison, the maximum displacement of the results outside the ordinary type gantry 11.17 mm, the new maximum displacement of the outer door frame 11.9 mm. Although the increase in the new slight deformation of the outer door frame in the same conditions, but little difference between the amount of deformation that can meet a variety of conditions.

After CAE computer simulation experiments, the two kinds of the outer door frame beams in structural strength were compared. After loading under the same conditions, the stress state of the ordinary type outer door frame beams is poor, the maximum stress is 144 MPa; force status of new outer door frame beams Welded structure better, maximum stress is 113 MPa.

Seen from the above, the new structure of the outer door frame assembly is simple, less quality, optimized processing components, while higher productivity, at the same stress conditions can replace common type outer door frame assembly to use.

Forklift soft and hard-wired connection gearbox vibration analysis and comparison tests

Nowadays, small tonnage forklift soft connection gearbox has become the trend and the trend, its excellent damping performance and driving comfort by more and more customers. electrical forklift also respond to market demand, has developed a new gearbox type, and for this soft and traditional hard-wired connection transmission gearbox, making comparative analysis of vibration.

Testing tools: a smart phone (equipped with acceleration sensors, equipped with vibration test software), double sided tape, cable ties and other fixed tool sleepy.

Note: The accelerometer on the phone, although not as professional precision and accuracy of the sensor, there is no professional data acquisition and analysis equipment, but still able to visually reflect two different gearbox support structure, different damping effect .

Test objects: soft connection gearbox Diesel Rough Terrain Forklift Truck 1, 2.5 tons, C240 engine; hardwired gearbox forklift 1, 2.5 tons, C240 engine. Like the rest of the configuration of two forklifts.

Test conditions: engine idling, the same two truck idling.

Note: With the increase in engine speed, vibration significantly reduced, so the test conditions to select the engine idling.

Test points: engine cylinder head, the seat surface, the left side of the steering wheel rim, front fascia frame Omo.

Forklift hydraulic mechanical transmission repair

Forklift hydraulic mechanical transmission system is an important part of the vehicle, some of the internal combustion off road rough terrain forklift after prolonged use, hydraulic mechanical transmission system will be some common faults, for example are: output power shortage, difficulty starting, shifting unresponsive; oil temperature is too high and the torque converter does not work.

Failure Analysis

Found in the course of the

electrical forklift

 underpowered, climbing difficulty, shift unresponsive, and load lifting work, the first detection system pressure gauges are available, if less than the required pressure value may be due to: Compensation pumps gear pump for excessive wear, the compensating pump gear pump for excessive wear, so that the increase in the compensation pump leakage; cleanliness bad oil caused oil plug, make compensation sucked empty.

If the oil temperature is too high, the usual reason is: the oil pump oil blockage caused by inadequate compensation amount, the clutch dry friction caused by high oil temperature; adjust the pressure inside the torque converter oil pressure falls below the main pressure valve, so that converter outlet pressure is too low; oil grades wrong; converter damage to internal components of the engine's power is only rarely passed to the turbine part, reactive power is too large and cause a sharp rise in oil.

If viewed from the observation hole of the torque converter to the torque converter does not work, you should first check the oil return into the oil and torque converter, if not back to the oil, and the truck with normal cold and hot cars travel difficulties, the cause of the failure to compensate pump badly worn or damaged; if the torque converter without power output, while sometimes working without work, the cause of the malfunction is the oil plug, inside idler pulley seat or seat cover is damaged nut loosening.

Troubleshooting

As can be seen from the above analysis, the truck's hydraulic mechanical transmission failure is mainly the oil, torque converter and compensation pump these three aspects. Therefore, the first consideration should be to clean up the oil troubleshooting, replacing the oil and oil filter as required; then check the torque converter and compensation pump these three aspects. Therefore, the first consideration should be to clean up the oil troubleshooting, replacing the oil and oil filter as required; then check the torque converter guide wheel, seat and clutch pulley for damage; and finally check the pump to compensate for wear and repair or replace damaged components. Must clean up the oil radiator surface dust and dirt. Were above treatment, generally better troubleshooting.

In the maintenance of transmission lines, should pay attention to the following checks; engine flywheel, the torque converter and shell concentricity error should be less than 0.2mm; dynamic unbalance lands should be less than 30g · cm; the engine flywheel housing face and converter housing relative to its axis of the end face side beat no more than 50UM; there should be a gap between 1.0-1.5mm converter fork and compensation pump gear end.

Forklift for sale

Data show that, although there are Chinese version of the Marshall Plan, "Fudge", but construction machinery sales this year, there has been no improvement. Data Industry Association show that in the four major construction machinery (excavators, loaders, bulldozers, rollers), and included in the statistics of 28 major excavator excavator factory in September 4559 units were sold, down 33% year on year , down 15% YoY; loader sales fell 24 percent to 10,001 units so far this year sales fell 10%; bulldozers, the 12 major manufacturers bulldozer bulldozers sold 535 units in September, down 252 units, a drop of 32.02 % total sales from January to September 6369 units, down 1318 units, a drop of 17.15%; 22 companies in September sales rollers 989 units, down 338 units, a drop of 25.47%.

In this context, the project has become a vehicle High Mast Diesel Forklift belongs one of the few bright spots. China Construction Machinery Association Industrial Vehicles Branch Secretary Zhang Jie told the China Securities Network reporter, before ten months of this year, construction vehicles are the only two to maintain growth of construction machinery sub-sectors, market demand, "the truck has been relatively stable. And now due to the rise of the downstream electricity providers, logistics construction investment has grown rapidly, while consumers of food, medicine and other logistics transit time there is growing demand for the product requirements, Diesel Rough Terrain Forklift Truck sales should be able to maintain double-digit growth every year. "

Safety requirements for work trucks and hydraulic systems

First, forklift safety requirements working device

1. The mast shall be deformed and weld sealing off phenomenon, both inside and outside of the door frame roll gap adjustment should be reasonable and not greater than l. 5mm, wheel rotation should be flexible, wheel and axle should be free of cracks, defects. Round groove wear amount not greater than 10% of the original size.

2. Two lifting chain tension should be uniform, not distorted, end coupled solid, chain pitch must not exceed 4% of the original length, or should replace the chain. Sprocket rotation should be flexible.

3. Fork shall have severely deformed weld sealing off phenomenon. Fork surface without cracks, open seam welding phenomenon. Fork root angle not greater than 93 °, the thickness of not less than 90% of the original size. Left and right fork tip height difference must not exceed 3% of the fork length of the horizontal section. Fork positioning should be reliable, fork hook bearing surface, positioning surface no obvious defects, with the gap fork and fork frame should not be too large, and smooth movement.

4. lifting cylinders and connecting parts of the door frame should be solid, tilt cylinders and door frame, hinged frame should be solid, flexible, with the gap is not too large. Cylinders should be sealed, no cracks, smooth. At rated load, lOmin door frame from the sink is not more than 20mm, angle of no more than 0.5 °. Lifting speed at full load should not be less than half the standard value.

5. Overhead guard, backrest should be complete and effective.

Second, Lpg Gas Forklift Truck safety requirements of the hydraulic system

1. Night pressure system pipe joints solid, no leakage, and other parts do not touch the ground, rubber hose or aging, deterioration phenomenon.

2. The hydraulic system transmission components rated load, rated speed range should not be crawling, stagnation and a significant impulse phenomenon.

3. The multi-valve housing no cracks, leaks; be good and reliable performance; safety valve is sensitive, in 25% overload should be able to open, adjusting bolt nut should be complete strong. Operating handle positioning accuracy, reliability, not due to vibration displacement.

4. load curve, the hydraulic system should be complete clarity nameplate.

Compare electric truck maintenance costs

Today, electric cars in storage devices, becoming the darling of the times. Electric truck with a battery as a power source, a DC motor driven hydraulic power unit to enhance the ease of operation, stand-driving, high efficiency, saving time. And low noise, no pollution can be widely used in many different industries, has become the first choice for many manufacturers.
But many customers are manufacturers of electric vans routine maintenance and upkeep worried, worried that the high cost of repair and replacement of parts, maintenance is not timely issues such as the 14-year industry production maker cattle machinery company for our customers and friends to share market and electric 2 Ton Diesel Forklift Truck maintenance problems
Regardless of any equipment and products can not guarantee permanent quality, maintenance is necessary, thus ensuring a longer equipment life, and make greater contributions to the enterprise.
First, in the electric truck equipment. According to Xiao Bian understand the market price of the replacement drive brushless motor about 3 * 100, the maintenance of the drive motor 1 * 1000, if the replacement drive brushless motor upgrade is 3 * 100, replacement and configuration bearing 2 * 40, the rotor 1 * 2000 yuan, replace the contactor 3 * 200 yuan. The total cost of the entire material costs are between 4000-5000. Of course, there is the most important labor costs, the labor costs can not be accurately calculated and careful use, one person, one car repair prices around 400-500, depending on the circumstances. Besides electric cars in the course not all parts are a problem, and work with the increasing use of time, there will inevitably be some parts loss and maintenance, the whole prices are around a thousand. Typically this problem is not more than 10 years, except for individual cases.
If special circumstances, motor damage, repair price around 10,000 yuan, so the operation and use of electric High Mast Diesel Forklift series device, the manufacturer's instructions must be strictly in accordance with the relevant regulations and business operations, to avoid accidents adverse situations.

Braking system common faults and approach

The first two rounds of the brake can not analyze the reasons for failure are:
1, the gap between the two brake lines or brake ranging blockage, the gap between the two brake adjustment or dredge pipeline;
2, there is oil in the brake drum or brake shoes distorted, approach is to remove oil or repair, replacement brake shoes;
3, there is air in the brake lines, is the way to deal with exclusion of air brake lines.

Second, the hand brake failure, this may be due to the hand brake cable slack approach to treatment is to adjust the hand brake wire tightness.

Third, Zhidongshiling, analysis of failure are:
1, the diesel engine partsbrake drum and brake shoe gap is too large, is the way to deal with the gap modulation of the brake drum and brake shoes;
2, the brake master cylinder fluid out of the valve failure, maintenance approach is out of the valve;
3, excessive brake lining wear, friction plate approach is better;
4, the contact surface is not enough friction plate, friction plate approach is repaired.


Steering system common faults and approach:

First, the steering gear oil spills, analyze the reasons for failure are:
1, each steering joints (body, every dish, stator, rotor) oil spill, this treatment approach is to replace the seals, cleaning steering, sturdy bolt joints or better;
2, the journal of the relief valve seals or damaged, this approach is relatively simple, the journal is a better place and seals at the relief valve;
3. Limit bolt washers at uneven way this situation was handled better polished washer or gasket.

Second, steering failure, analyze the reasons for failure are:
1 piece of battery powered forklift broken steering spring break or deform steering pin, it may be broken or deformed coupling opening, this approach is better spring, pin, coupling;
2, valve failure, the approach is to clean safety valve, replace the spring;
3, steering cylinder leakage is too large, the approach is to replace the seals or cylinder.

Forklift truck hoisting system maintenance and repair

Forklift truck hoisting system is a device for loading and unloading work directly forklift truck, cargo unloading, stacking and ultimately by its completion, so it is the most important part of the forklift truck. Often need to strengthen the conservation and use, in order to maintain a good technical condition of it.

Disassembly and assembly and adjustment

The inner, outer door frame. battery forklift trucks‍ truck hoisting system between each main component, have relative motion. Wherein the inner and the outer door frame composed of a kinematic pair, fork frame and inner frame composed of a kinematic pair. In order to improve the motion accuracy of kinematic pair, the decrease of the friction between the moving member, reducing vibration and noise, improve the lateral stability of vehicle unloading goods fork, both inside and outside the door frames and forks on both side roller adjusting shim. Through the shim adjustment, so that a gap between the cargo fork frame side roller and an inner door frame, door frame gaps between the roller and the inner and outer door frame, if the relative motion freely, the gap value is not greater than 1mm. When the gap between the roller or coincidence type gantry clearance exceeds the specified by the design, roller to be adjusted or replaced, to ensure that the clearance of rolling or sliding, reduce the impact sound, to prevent the goods from sliding out of the goods fork. The door frame section flange size (thickness) reduced by more than LMM or the whole door frame combined lateral dimensions (width direction of the vehicle) is greater than a specified size more than 2.5mm, the emergence of the door frame deformation and warpage, are required to replace the door frame, in order to ensure the safe use.

The guide pulley and the lifting chain. Chain assembly, two chain tensioning force should be equal, load as evenly as possible, not to have the distortion phenomenon, the two sprocket after installation, flexible rotation. The pairing of the two forks, fork length should be approximately equal thickness. Two fork vertical section and horizontal section angle should be consistent. Two fork mounted on a fork, a plane on which should be kept in the same plane. The adjustment of the maximum length of heavy chain should be in the fork to the maximum lift height (i.e., lifting oil cylinder piston rises to an upper limit) when, after the adjustment of the hoisting chain should not be too tight, usually at the height of LM, with 5ON force on the chain, the deflection of 2Omm maximum as qualified. Each maintenance, dealing with inner and outer door frame channel steel and the chain sprocket grease, to ensure good lubrication, reducing friction of kinematic pair. In the wide field of vision in the hoisting system, the two lift cylinder (cylinder) stroke should be equal, the oil inlet pipe of each should be smooth. Two cylinder plunger rod end should also contact with the inner door frame, a sprocket support.

Fork. As the installation size hook and a fork between the standardization, linked to various attachments are the same and fork. So the plate fork frame can be conveniently replaced attachments. In order to make the fork or attachments from the fork frame is on or off, when the fork is provided with a file Shelves, can use the middle lower plate gap disassembly fork. In order to make the fork or attachments on the positioning frame and fork fork to adjust the spacing, can use a plurality of positioning upper plate symmetrical hole and a positioning groove, the positioning pin positioning by fork upper with spring. When the fork is hinged type, fork frame made of a sliding rod type, in the fork is arranged in the frame around the two round shaft, one on each circular sleeve fork, fork can slide on a round shaft, to adjust distance between the two forks, assembly and disassembly fork, need to be circular shaft next, fork is used card pin on the circular shaft.

Fork. The installation should pay attention to the selection of Lpg Gas Forklift Truck‍. The pairing of the two forks, fork length should be approximately equal thickness. The angle between the two fork vertical section and horizontal section should also be consistent, fork mounted on a fork, two forks on the plane should be kept in the same plane, should not be high and low dislocation phenomenon.‍

Forklift common system failures and approaches

Forklift use battery, diesel, propane and other industrial power for industrial energy forklift, currently more common mobile forklift are: electric forklifts, electric forklift trucks (the industry is generally divided into all-electric forklift trucks, semi-electric stacker) , electric cars, propane forklifts, diesel forklifts, etc., to the individual needs and design and production, such as reach trucks, gas powered forklift attachments (attachment of meaning is based on specific market needs to be redesigned for the forks manufactured to meet customer demand, the current common attachments such as dump, Paper clips, clamps drums, tires fixture, wooden clip and so on, the design is very flexible), etc., these are
all maneuvering the truck category. Tactical Truck class commonly used systems are: drive systems, lifting systems, hydraulic systems, braking systems, steering systems, the general failure of love on these five systems, systems approach common faults.

Drive system common faults and approach:
First, the clutch does not slip or separation, analyze the reasons for failure are:
1, the friction plate on top of the sticky oil or lining is damaged, this treatment approach is to clean or replace the friction plate friction plate;
2, combined with the state of the release bearing pressure in the release lever on top of this treatment approach is to adjust shorter cylinder pushrod assembly;
3, release bearing too much free travel, this treatment approach is to transfer cylinder assembly in the long putter;

4, the oil in the air, this approach is to drain the oil inside the air;
Second, the gearbox abnormal sound, analyze causes are:
1, excessive gear wear or bearing damage, this treatment approach is to replace the gear or replacement of bearings;

2, there is debris inside the gearbox, way to deal is to exclude debris.
Lifting system common faults and approach:First, the time is not synchronized gantry tilt, analyze the reasons for the failure is due to inconsistent or two tilt cylinder stroke cylinder bore size of the pipe joints closure due to the inconsistent, way to deal with the adjustable tilt cylinder 2 stroke and replace
with the same closure hole connector.
Second, the load can not lift the door frame, this is because the multi-way valve overflow
hole plug, multi-way valve by removing the overflow hole debris on it.
Third, the electric forklift trucks mast fell too fast, this is because the inlet valve speed does not work, the only limiting valve repair it.
Fourth, the fork mast down automatically, this is because of lack of hydraulic oil cylinder caused by the maintenance approach to multi-valve, add hydraulic oil.

Forklift truck hoisting system repair

Ask heavy system technology. Door frame should be no cracks, defects should not affect the strength, rigidity, deformation amount shall not exceed the allowable value of design. The door frame generally use the overlapping structure. Inside and outside the door frame should be with a good, flexible slide, no blocking phenomenon.

The guide pulley rack should be installed in the correct and reliable. The pulley and the pulley shaft should be free of cracks and defects, wheel groove wear amount shall not exceed the original design thickness of 10%, and the guide pulley rack with appropriate, flexible and reliable rotation to make the pulley. Chain specifications should be consistent with design requirements. Chain plate and the shaft should be no cracks and deformation, and maintain a flexible and reliable transmission.

The gear frame wheel frame should be intact, no cracks, and the portal frame with good, can in the door frame, a flexible sliding smoothly without jamming phenomenon. Surface of the guide wheel frame beam should be flat, smooth, stable and reliable to fork lateral movement. Fork should have sufficient strength and rigidity, and the guide wheel frame beam with good. Attachments shall be fitted with a protective frame of general framework of flat steel, and to maintain the integrity and no distortion. The door frame and the tilt cylinder and the frame shall be connected firmly, with a good, reliable lock, flexible rotation.

The door frame can not have deformation and welding sparks, door frame and the door frame, with the frame and the inner frame is relatively smooth ascending and descending. The door frame and the roller clearance shall not be greater than 1.5mm, the sliding good without jamming. Roller rotation should be recorded live, roller and shaft should be no cracks, defects, wheel groove wear amount shall not be greater than the size of the original 1O%. Two hoisting chain tension should be uniform, no distortion, end the connection is firm; the chain pin shaft and the clearance of bearing holes shall not be too large. Sprocket rotation should be flexible, groove depth of no more than the original size of the 0.5mm; the gear frame shall have serious deformation, weld the welding phenomenon.

Fork surface shall not have cracks, each weld shall not have sparks. The fork root angle of not more than 93 degrees, the thickness shall not be less than the size of the original 90%; the left and the right fork tip height shall not exceed the fork length of horizontal section 3%; fork positioning should be reliable, a bearing surface and a positioning fork hook surface without obvious defects; fork and genus clearance with frame should not be too large, and move smoothly.

Wear and tear parts and maintenance. In the use of forklift, fork of the dangerous section of common upper elbow and fork and the vertical sections of the hook on the vertical portion of welding in the vertical section near the lower part, dangerous position is extremely easy to produce fracture. In particular, forklift truck manufacturers‍ drivers often illegal operation, used alone side fork front-end lifting or sharp pick goods on the ground, leading to the fork or fork sharp bending deformation, even (cargo overloaded) vertical section of root and broken consequences will cause serious economic loss.

Maintenance of the common fork of forklift truck. According to the national standard, the fork usage should be checked annually; used in the harsh conditions of forklift need more frequent inspections, to detect any defect or permanent deformation, take the relevant technical measures, so as to eliminate the hidden trouble of safety. For inspection by the professional and technical personnel of electric forklift trucks‍ fork fork produces, found signs of impede the safe use of the failure and obvious deformation of any defect, must stop, and only after rigorous repair, and after test acceptance qualified rear can use.

Fork the surface crack (especially the fork root, hook, hook and under vertical segment junction), once found, the height difference between the two fork tip, more than the length of horizontal section 3%, fork must stop using. Use must also ensure the positioning pin in well maintenance and normal condition in situ, if any fault, fork must stop before the good repair. Should be regularly checked thoroughly wear degree fork horizontal section and vertical section, especially the fork root, if the thickness is reduced to the original 90% should also stop using. The hook on the support surface fork and positioning hook under the surface wear, the backlog and other local deformation, increased gap between the fork and the fork, must repair before use.

In the absence of conditions, fork breakage is best replaced with new parts, not allowed to improvise to use, even if the fork after repair welding, only through the strict technical standard test, to achieve the original specification requirements, can be put into use.‍