1, the loader of a gear walk or not walk, the rest of the stalls normal.
Judgment points:
Do not walk or walk slowly, the main drive shaft rotation fast and powerful, to enhance the engine speed, the main drive shaft speed and front and rear drive shaft is clearly disproportionate.
The gap and the remaining stalls variable speed hydraulic normal, hanging the pressure after the block decreased significantly.
cause of issue:
1) bearing cover or nylon ring serious wear and tear.
2) If the bearing cap or nylon ring is good or slightly worn, make sure that the clutch inside and outside the seal is bad.
Method of exclusion:
Replace the corresponding damaged parts that bearing cover or nylon ring, inside and outside the sealing ring, re-adjust the sleeve and bearing cover clearance.
Failure analysis: a stall can not walk or not walk, can rule out the torque converter, walking pump, pressure relief valve and other items of common oil and components of the problem, the fault occurred only after the shift control valve to the file Clutch ** on the oil path. Bearing cover, nylon ring, inside and outside the sealing ring and other weak parts of the wear and tear, the clutch to the clutch cavity of the oil from the wear parts of a large number of leakage, resulting in reduced oil pressure. Hanging neutral or the remaining stalls because the oil does not flow through the wear parts, and thus the oil pressure is normal.
2, the gap automatically forward, into the forward block can also be normal driving, hanging back when the machine stops, can not walk. Each block work pressure are normal.
cause of issue:
Forward clutch main, driven piece sintered.
The forward clutch piston is jammed and the seat check valve is clogged.
Method of exclusion:
Open the clutch, clean the oil, replace the main, driven friction plate and related damaged parts, cleaning the relevant parts, replace the outer ring, cleaning dredge check valve, replace the clutch friction plate, inside and outside the ring.
3, the whole process of normal driving, hanging after the second block suddenly does not work, check the file and the rest of the block work pressure are normal.
cause of issue:
The clutch is axle off.
Method of exclusion:
Replace the clutch shaft and adjust the bearing clearance.
4, the whole machine suddenly do not move forward, do not retreat, variable working pressure normal.
cause of issue:
1), for the variable speed distribution valve failure or (40F, 50D, 50F) Accumulator damage to the variable speed valve The pneumatic stem is stuck or damaged.
2), into the oil road blocked.
3), accumulator oil block.
4), gas control valve failure.
Method of exclusion:
Clean the valve to isolate the valve stem or replace the gas control valve to clear the relevant oil, repair or replace the gas control valve.
5, the whole machine work, suddenly no turn to lift, do not walk, then the elastic connection plate damage or coupling wheel teeth
cause of issue:
Elastic coupling plate disassembly, elastic coupling plate fixing bolts damaged, connecting wheel teeth.
Method of exclusion:
Replace the elastic coupling plate and replace the coupling wheel.
6, variable working pressure is normal, the whole machine operation in case of heavy load, the main drive shaft rotation fast and powerful. And the machine in the shovel operation can not work and variable speed oil in the rule of gold powder
cause of issue:
The high and low speed joystick is not in the low speed position or the shift valve is not inserted in place, 1: 3 clutch is damaged and the forward clutch is damaged.
Method of exclusion:
The high and low speed rod hanging to the low speed position, re-adjust the lacrimal bacteria.
Replace the clutch friction plate and damage the relevant parts.
7, torque converter top breathing machine channeling oil
cause of issue:
Variable speed valve Valve lock valve "O", leak, torque converter oil return filter block, torque converter internal oil or wheel seat block blockage, torque converter to the gearbox oil return line blockage.
Method of exclusion:
Replace the air control valve "O" ring, clean the return oil filter or replace the filter, clean the oil or replace the guide wheel seat, clean or replace the tubing.
8, torque converter has abnormal sound
cause of issue:
Torque converter joint teeth or rubber teeth damage, torque converter elastic joint plate split, 30F, 30D torque converter main, by the pinion or bearing damage, the main drive shaft spline does not correspond to or universal joint bearing clearance The
Method of exclusion:
Replace the coupling wheel or rubber teeth, replace the elastic connection plate, replace the main, passive gear or bearing, re-adjust or adjust the gap.
9, the machine work properly, high oil temperature, the output power shortage and variable oil in the aluminum foam
cause of issue:
Back to the oil filter plug, mechanical oil radiator plug, back to the oil pipeline is poor, bearing damage, torque converter three round wear.
Method of exclusion:
Clean the filter or replace the filter, replace the radiator, clean and clear the oil or replace, replace the bearings, replace the three rounds and adjust the gap.
10, low speed or high speed off the block
cause of issue:
The control part of the gap is too large or improper adjustment rod, sliding sleeve and high and low speed gear wear, the amount of engagement is too small, high and low speed into the gear bushing and the output shaft clearance is too large, fork fork or fork shaft positioning spring break.
Method of exclusion:
Adjust the clearance of the associated drawbar, replace the damaged sleeve and gear, replace the gear bush and adjust the gap, replace or repair the fork to replace the spring.
11, the transmission of hydraulic oil increased, working hydraulic fuel tank to reduce the oil
cause of issue:
Working pump or steering pump oil seal aging, working pump or steering pump pump shaft axial clearance or radial obstruction is too large.
Method of exclusion:
Replace the working pump or turn the pump oil seal, repair the calibration pump or replace the pump.
12, the hydraulic fluid within the gearbox to reduce the hydraulic oil tank to increase the number of hydraulic oil
cause of issue:
The working tank is plugged into the oil filter or the oil pump is sucked.
Method of exclusion:
Clean or replace the oil filter, replace the oil pump tubing.
13, gearbox neutral or hanging block, the variable speed are low machine running weak
cause of issue:
Transmission gear is not enough, the transmission box sump filter blockage, running pump damage, low volumetric efficiency, pressure relief valve or inlet pressure valve to adjust the pressure properly, walking pump suction tube aging or bending serious.
Method of exclusion:
Add the hydraulic oil in the gearbox to the middle of the oil standard at idle, replace or clean the filter, replace the running pump, re-adjust the pressure to reach the required range, replace the tubing.
14, the loader in the normal driving, suddenly no steering, while the steering wheel can easily turn.
cause of issue:
Turn the cylinder piston off.
The steering column and the diverter connection sleeve are broken or damaged.
Method of exclusion:
Replace the steering cylinder.
15, the loader in the normal driving, suddenly no steering, while the steering wheel can not move.
Method of exclusion:
Turn the pump roller key or connect the sleeve spline damage.
Steering gear check valve off (within the valve block) Steer Ф8mn ball (check valve) failure.
Replace the steering pump or connecting sleeve, replace the valve block or check valve.
16, automatic steering, the steering wheel can not automatically return to the median.
cause of issue:
The return spring in the diverter is broken.
Method of exclusion:
Replace the return spring or the steering gear assembly.
17, steering wheel encounter ground uneven, the direction of the side of the ground automatically to the side of the bias
cause of issue:
Two-way overload buffer valve is damaged.
Method of exclusion:
Replace the steering gear, clean the repair or replace the valve block.
18, turned heavy
cause of issue:
Steering pump into the oil filter or tubing blocked, steering column and diverter connection gap is small or no gap, steering gear spool and valve sleeve, stator and rotor with too tight monostable valve or overflow pressure is low or Stuck, steering pump volumetric efficiency is low.
Method of exclusion:
Clean the filter or replace the tubing, adjust the gap, replace the steering gear or clean the grinding, adjust the pressure to reach the specified value, replace the pump.
19, turned without end feeling
cause of issue:
Steering valve block on the two-way buffer valve Spring break or two-way buffer valve to adjust the pressure is lower than the steering safety valve pressure, turn to the safety valve oil pipeline blocked, steering valve body, valve cover, spool gap or turn the sub-serious wear gap Big.
Method of exclusion:
Replace the spring or adjust its pressure to the specified value, clean and clear the pipeline, replace the steering gear.
20, 50F loader suddenly no lifting in the work, no steering
cause of issue:
Pilot pump roller or pilot pump shaft off, torque converter and pilot pump connection bearing damage.
Method of exclusion:
Replace the pilot pump or # axis key with Xiaozi, replace the bearing.
