50. The pressure of the forklift gearbox is normal and the walking is not energetic

1. Engine or torque converter failure: The three major systems of the machine's walking, operation and steering all rely on the engine and torque converter to drive three hydraulic pumps.

If the power is provided, it can be judged by the contrastive elimination method. When the bucket is full, it is easy to lift and flip, indicating that the engine and torque converter output are normal.

2. Insufficient pressure of the walking system: pressure gauge from the dashboard of the cab.

The walking system pressure was observed, and the results showed that the maximum walking pressure was MPa, which was lower than the normal value of MPA).

3. a transmission.

Insufficient oil: Check the oil dipstick of the transmission, the oil level is in the normal range, and there is no shortage of oil.

Hello I am just repairing the loader How much is the pressure of the gearbox Is it okay to walk normally if you are not energetic There may be a problem with the transmission pump.

Cause analysis and solutions:

2. The oil pump cannot effectively suck in and pump out the oil due to dirty or viscous oil, resulting in low or no pressure oil pressure. The solution: change the oil.

3. The oil is thin or the oil becomes thin due to the high temperature of the engine, which will leak from the gap of each friction pair of the engine, resulting in low oil pressure. Solution: Change the oil or overhaul the cooling system.

4. Oil leakage of oil pipe, damage to the oil pump or excessive wear of its parts will lead to a reduction in the intake and pumping of oil, or no amount at all, resulting in low or no pressure in the oil pressure. Solution: Overhaul.

5. The gap between the crankshaft and the size of the tile exceeds the standard, resulting in oil leakage, resulting in low oil pressure. Solution: Overhaul.

6. The spring of the pressure limiting valve or pressure relief valve is too soft or the hairpin or steel ball damage causes the function of the valve to disappear or weaken, resulting in a decrease in oil pressure. Solution: Replace and overhaul.

7. The oil pressure is low due to the failure of the oil induction plug, pressure gauge or circuit. Workaround: Replace the check.

There are several main valves.

1. Hydraulic oil filter bypass valve: This valve is installed on the top cover of the hydraulic oil filter, when the hydraulic oil filter is blocked, in order to avoid the system oil cut-off, this valve will be opened, so that the hydraulic oil can directly enter the system without filtration. Generally, the opening pressure of this valve is about the same.

2. Torque converter system safety valve: On the oil road leading to the torque converter, there is a system safety valve, and its opening pressure is generally between, and its function is to avoid excessive oil pressure inside the torque converter and protect the safety of the torque converter.

3. Lubrication pressure regulating valve: After the hydraulic oil comes out of the torque converter radiator, it should enter the gearbox to lubricate the gear transmission mechanism, and the pressure at this time should not be too large, otherwise it will lead to the difficulty of sealing the gearbox. Therefore, a lubrication pressure regulating valve is set here, and its opening pressure is generally between to avoid excessive lubricating oil circuit pressure.

4. Clutch shut-off valve: This valve is installed on the shift valve assembly, and its function is to automatically cut off the pressure oil leading to the shift valve when the air pressure of the braking system is insufficient and when the brake is stepped on, so that the gearbox can be switched to neutral. On the one hand, it plays the role of safety protection to avoid driving in gear when the air pressure of the braking system is insufficient, and the brake failure is caused by insufficient air pressure; On the other hand, when the braking system is working, the gearbox is switched to neutral to avoid the continuous power output of the gearbox, which conflicts with the driver's driving intention.

The normal operating pressure range of the gearbox, the pressure is lower than but higher than the pressure is too low. The main reasons for the low pressure of the gearbox and the elimination method are:

If the oil quantity of the gearbox oil pan is insufficient, the hydraulic transmission oil should be filled to the specified oil level;

If the transmission oil filter is blocked, the cause of the blockage should be checked, and the oil filter should be cleaned or replaced;

If the oil pan of the gearbox is poorly sealed and the suction pipeline of the variable speed pump is poor, the pipeline should be overhauled or replaced;

The variable speed pump is seriously worn, causing internal leakage, and the variable speed pump should be replaced;

If the regulator valve of the variable speed control valve is improperly adjusted or the pressure regulating spring is damaged, check whether the pressure regulating spring is damaged and readjust it to the specified value;

The regulator stem or accumulator piston of the variable speed control valve is stuck in the valve body. The regulator and accumulator should be disassembled for cleaning.

It should be noted that oil deterioration will also cause the phenomenon of low oil pressure, and the oil quality should be checked and replaced in time; Inaccurate pressure gauge or damaged sensor will also cause the illusion of low pressure, which should be repaired and replaced in time.

The transmission system pressure is low; 1. The oil level of the gearbox is too low, 2 The main oil channel is leaking, 3 The filter element is blocked, 4 The variable speed pump is failing, 5 The variable speed control valve is faulty (including the accumulator, emergency shut-off valve), 6 The elastic plate is damaged, 7 The oil pressure gauge is faulty.

A large part of the transmission failure is caused by the dirty valve body, which can destroy the quality and friction characteristics of the transmission oil.

A gearbox is a gearbox that changes the gear ratio and direction of movement. Located between the clutch and the ** transmission. The main functions are:

Changing the driving force and travel speed of the vehicle (shifting gears) while the engine speed and torque remain the same; so that the vehicle can drive backwards (reversing); The engine can be parked without stalling (neutral).

According to the transmission type, the gear gearbox can be divided into three types: two-shaft type, three-shaft type and component type. The two-shaft type has two main shafts (excluding the reverse shaft) and is reduced by only one pair of gears. The three-shaft type has three main shafts (the first shaft, the intermediate shaft, and the second shaft), which are decelerated by two pairs of gears.

The composition consists of two gearboxes connected in series or parallel in order to get more gears with fewer gears.

The things you need to pay attention to when buying a car are as follows:

1. Confirm the purchasing ability

Determine the purchasing power, after buying a car does not affect the overall quality of life of the family, generally according to the average income of the family in the past three years, generally take out 20% of the family for three years, but not more than 10% of the value of the family's fixed assets.

2. Concerns:

The most important thing for a family car is safety, followed by affordability, because the safety of the car carries the life of a family, so safety is the top priority.

3. On-site confirmation:

According to the above two steps, basically determine the several models to buy, and go to the 4S store to confirm on the spot, including test drive, inquiry, loan, repair and maintenance, and other related information.

It could be an assembly issue.

Pitch converter section.

1.The turbine assembly adjustment gasket adjustment is too tight. The bearing is jammed.

2.Missing guide wheels.

3.The guide wheel seat is misaligned and not aligned with the oil hole.

Gearbox part. 1.Beyond the clutch bad.

Transmission section.

gear, the reverse piston assembly is too tight.

2.Missing sun gear.

3.The clutch plates are misplaced.

4.There is a foreign object blocking the oil passage.

Ultra-longitudinal valve section.

1.The ultra-longitudinal valve gasket is incorrect.

Check 1Check the oil inlet pipe of the radiator, if there is an oil outflow and the flow is large, it means that the guide wheel seat is not installed incorrectly2Check the variable speed control valve to view.

If the problem is not cleared, the transmission should be disassembled from the new one.

It may be that the guide wheel seat is not aligned with the oil port, check the torque converter housing bypass valve, the housing interface pad is not cleared to the torque converter oil channel hole, and the internal assembly of the gearbox is wrong or something is missing.

Jin Prince Heavy Duty Truck gearbox overhaul is very noisy, what's going on.

Summary. Hello dear! What is the matter if the Xia Gong 50 forklift repairs the gearbox without pressure: 1. The hydraulic oil in the gearbox is insufficient, or the hydraulic oil does not meet the specified standards. Generally, this type of gearbox must use the specified hydraulic oil.

Hello dear! Xia Gong 50 forklift repair round judgment no pressure in the gearbox does not go back to the big event: 1. The hydraulic oil in the gearbox is insufficient, or the hydraulic oil does not meet the standards specified in the orange belt reform. Generally, this type of gearbox must use the specified hydraulic oil.

2. The oil filter element in the oil pan is blocked, resulting in too little hydraulic oil throughput. This filter element is generally a metal mesh filter, and the most common failure is that the oil filter element is not replaced for a long time, and the surface is blocked by various impurities, gums, metal grinding chips, etc. 3. The oil pipe from the oil pan to the variable speed pump leaks air or has broken skin and interlayer inside.

Air leakage will lead to insufficient oil absorption or even inability to absorb oil from the variable speed pump, and the interlayer will lead to the narrowing of the hydraulic oil path, which will lead to insufficient pressure in the hydraulic system. 4. The variable speed pump is damaged or worn excessively, resulting in insufficient pressure. Or the drive mechanism (shaft gear) of the variable speed pump is damaged, and the variable speed pump cannot rotate without a whim, and the most common is that the spline inside the shaft gear is worn excessively and cannot drive the variable speed pump.

1.Check the automatic transmission.

Whether the oil level is normal.

Start the engine, preheat the transmission oil to about 50, and then put the gear selector lever in each gear.

After staying for 2 seconds, put it in the parking gear, at this time, the normal oil level of the dipstick should be located between the highest and the lowest line, if it is not enough, the same quality oil should be added in time.

2.Take control of automatic transmission fluid change intervals.

The oil change interval for most automatic transmissions is generally two years or 460,000 km (subject to the vehicle's manual). It is recommended to change the oil 2 3 thousand kilometers in advance.

3.Change the transmission oil properly.

By 2010, the better oil change method is dynamic oil change, the use of special gearbox oil change equipment, in the process of transmission operation, the old oil is fully circulated, and then add new transmission oil after discharge, so that the oil change rate is as high as 90% or more, to ensure a good oil change effect.

4.The owner should cultivate the awareness of active inspection, maintenance and maintenance, and can learn some basic knowledge of maintenance and maintenance of the vehicle, carefully read the instructions for use with the car, and remember some necessary data. Scientific car maintenance, Cai Gao Yanxian can ensure that the vehicle is in good technical condition and ensure driving safety.

Summary. This situation is caused by the damage of the coupling, the small drive shaft does not work after the gear, and the gas pedal does not turn, indicating that there is a serious problem with the coupler, and the transmission torque is insufficient, this problem needs to check whether the pressure regulator is normal, whether the oil supply oil of the coupler is sufficient, after eliminating the oil supply problem, the engine is removed, the coupler is completely decomposed, the internal bearings and blades are checked to see if they are damaged, and the abnormal wear is found to be replaced in time. Pay attention to the maintenance and oil change, usually use less, and ensure that the transmission oil is replaced once a year, otherwise it will cause serious deterioration of the gearbox, resulting in severe wear and tear inside the coupler.

It causes the problem of decreased power transmission efficiency, increased oil temperature and insufficient power.

30. The pressure of the forklift gearbox is normal, the small drive shaft turns in neutral, and the gear does not turn, and it does not go at all, what is the reason.

This situation is caused by the damage of the coupling, the small drive shaft does not work after the gear, and the gas pedal does not turn, indicating that there is a serious problem with the coupler, and the transmission torque is insufficient, this problem needs to check whether the pressure regulator is normal, whether the oil supply oil of the coupler is sufficient, after eliminating the oil supply problem, the engine is removed, the coupler is completely decomposed, the internal bearings and blades are checked to see if they are damaged, and the abnormal wear is found to be replaced in time. Pay attention to the maintenance and oil change, usually use less, and ensure that the transmission oil is replaced once a year, otherwise it will cause serious deterioration of the gearbox, resulting in severe wear and tear inside the coupler. It causes the problem of decreased power transmission efficiency, increased oil temperature and insufficient power.

Is there a relationship between the internal pressure of the coupler and the pressure of the gearbox?

If the pressure is lowered by the regulator in the second stage, the pressure of the coupler is in 4, which cannot be seen through the pressure gauge. The pressure gauge only sees the total variable speed pressure.

Is it possible that there is a problem with the gearbox?

There can be no problem with the gearbox, if there is a problem with the gearbox, the small drive shaft will keep turning and will not be affected.

Can this also be a problem if the coupler pressure is too low?

Yes, if the oil pressure inside the coupler is too low, the transfer efficiency will be reduced, and this fault will occur. Or the internal oil seal is worn, resulting in a large amount of oil leakage, which is also a fault phenomenon.

Summary. Dear dear, it's a pleasure to answer your <>

The reasons for the low pressure of the loader gearbox are as follows, the low oil pressure is divided into normal and faulty, the normal service cycle is long, the gap between the static pressure lubrication parts of the lubrication system becomes larger, resulting in the aggravation of leakage and the low oil pressure at idle speed, so that the alarm, the oil can be lifted from the normal low pressure, the fault low pressure alarm is the system related parts investigation, refueling at high speed to see if it can be lifted, can remove the fault of the alarm element, check the oil level down, no problem, check down to eliminate the oil grid problem is only to open the oil low shell, Through the oil pump pressure left and right to see the drip situation, the normal situation is within 15 drops of min, otherwise you will see a large number of leaks in the fault part, and the probability of the safety valve gap being stuck on the left and right is not large. <>

What is the reason for the low pressure of the loader gearbox?

Dear dear, it's a pleasure to answer your <>

The reasons for the low pressure of the gearbox are as follows, the low oil pressure is divided into normal and faulty, the normal service cycle is long, the gap between the static pressure lubrication parts of the lubrication system becomes larger, resulting in the aggravation of leakage and the low oil pressure at idle speed, so that the alarm, the oil can be lifted is the normal low pressure, the fault low pressure alarm is the system related parts investigation, refueling at high speed to see if it can be lifted, can remove the fault of the alarm element, check the oil level down, the mountain is no problem, check the oil grid problem down, only open the oil low shell, Through the oil pump pressure left and right to see the drip situation, the normal situation is within 15 drops of min, otherwise you will see a large number of leaks in the fault part, the safety valve gap in the left and right to do the probability of the god is not large. <>

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The reasons for the weakness of the loader gearbox are as follows, depending on how long your equipment has been used, there are many reasons for the weakness of walking, such as whether the power provided by the engine is insufficient, the friction plates of the gearbox are damaged, etc. It is also necessary to check whether there is no force to do other actions, such as whether the forward gear is weak in each gear, and whether the various movements of the bucket are weak. It is recommended that you find a professional to go through the inspection, how to solve the problem that the speed of the first gear can not be added, that is, the speed of the first gear refueling gearbox has a whistle and the speed is not up, and the work is energetic, that is, the oil temperature is high, and the failure of the loader gearbox is caused by the valve body is too dirty and cracked, and the gearbox valve body is too dirty and dirty will destroy the quality and friction of the gearbox oil.

Increased friction and wear, and at the same time, sludge will also be generated in the gearbox, causing blockage of the valve body and pipeline, and the oil pressure cannot be adjusted sequentially, resulting in transmission failure. If the gearbox of the small loader accessories has a weak walking situation, it must be solved when it is Xiangtong, so as to make it better developed. <>