Cause of malfunction
|
Elimination Method |
Noise in gearbox
The noise decreases or disappears when the clutch is depressed. The transfer case is in neutral gear.
| |
Insufficient oil level in the gearbox housing
| Check the level, add oil if necessary. Check for leaks. Clean the breather |
Wear or damage to bearings, gear teeth
|
Replace worn bearings, gears |
Gearbox shafts move axially
|
Tighten nuts, replace broken fixing parts |
Transmissions are hard to turn on
no extraneous noises
| |
Too thick gearbox oil
|
Use oil according to climatic conditions (see Applications) |
Worn or deformed gear lever
|
Straighten or replace lever |
Sticking of the spherical joint of the gear lever
|
Replace deformed parts, put lubricant LSTs-15, Litol-24 or SHRUS-4 into the hinge |
Fork rods are tight (locking nuts jammed, burrs on the rods, dirt in the sockets)
|
Clean worn and deformed parts - replace |
Sliding clutch moves tight on the splines of the hub
|
Clean the splines from dirt, cut off the burrs with a needle file, replace parts with crumpled splines |
Deformed shift forks
|
Replace Plugs |
Transmission randomly turns off
| |
Detent springs have lost elasticity, balls and/or stem seats are worn
|
Replace worn parts |
Damaged or worn synchronizer rings
|
Replace rings |
Damaged or worn clutch teeth or synchronizer ring gear
|
Replace clutch or gear |
Synchronizer spring broken
|
Replace spring |
Noise, crackle, squeal of gears
at the time of transmission
| |
Clutch does not fully disengage
| |
Too little oil in the gearbox housing
| Add oil. Check for leaks. Clean or replace breather |
Worn or broken gear teeth and/or synchronizers
|
Replace Parts |
Wear or deformation of the gear synchronizer ring
|
Replace ring |
Axial play of gearbox shafts
|
Tighten bearing mounts, replace worn bearings |
Oil leak
| |
Wear of oil seals
|
Replace seals. Clean or replace transmission breather if necessary |
Severe wear, nicks on the surfaces of the shafts on which the seals work
|
Clean up minor damage with fine-grained sandpaper and polish. When installing a new oil seal, you can underpress it a little, avoiding distortion (if necessary, placing spacers up to 1 mm thick under it), so that the lip of the stuffing box works on the unworn part of the shaft. In case of significant damage - replace the shafts and seals |
Increased pressure in the gearbox due to clogged breather
|
Clean or replace transmission breather |
The fastenings of the covers of the gearbox housing, clutch housing have loosened. Gasket damage
|
Tighten screw connections. Replace gaskets (when installing them, you can use a sealant) |
Corks not tightly closed
|
Pull up the plugs (you can seal them)
|