The operation of the clutch, torque converter and low gear and reverse brake is checked.
Warning: Make sure that no one is in front of or behind the machine during this test.
1. Check the fluid level in the automatic transmission. It should have a normal temperature of 70-80°C.
The engine coolant must also have its normal temperature of 80-95°C.
2. Put wedges under the rear wheels.
3. Connect the engine tachometer.
4. Turn on the brakes - parking and working.
5. Start the engine.
6. With the shift lever in position «D», fully depress the accelerator pedal to determine the maximum engine speed. Do not keep the throttle open longer than necessary for this purpose and do not exceed 5 s at a time. Braking speed: 2200-2500 rpm.
7. Perform the same test in position «R» gear lever.
Braking speed is higher than specified according to specifications in position «D».
If this is the case, then most likely the rear or overrunning clutch of the torque converter in the automatic transmission is slipping.
Braking speed is higher than specified according to specifications in position «R».
If the braking speed is higher than specified in this mode, then the front clutch of the automatic transmission or the low speed reverse gear brake slips.
Braking speed is lower than specified according to specifications «D» And «TO».
If the speed is lower than specified, insufficient engine power output or torque converter failure can be blamed. Check the engine for misfiring, correct ignition setting, valve clearances, etc. If all these parameters are beyond suspicion, then the torque converter itself is faulty.