2.3. Diagnostics of malfunctions of the transmission

(Malfunctions of other systems are also mentioned in this section, they are designated by a symbol •)

Cause of defect

Elimination method

Noise in the transmission Noise decreases or disappears if to squeeze out coupling. In the transfer case neutral transfer is included.

Insufficient level of oil in a transmission case

Check level, if necessary add oil. Check whether there is no leak. Clean сапун

Wear or damage of bearings, teeths of gear wheels

Replace worn-out bearings, gear wheels

Shaft of the transmission are displaced in the axial direction

Tighten nuts, replace the broken fixing details

Transfers join hardly, extraneous noises are absent

Too dense oil in the transmission

Use oil according to climatic conditions (see Appendices)

Wear or deformation of the lever of gear shifting

Correct or replace the lever

Jamming of the spherical hinge of the lever of gear shifting

Replace the deformed details, put LSTs-15, Litol-24 or SHRUS-4 lubricant in the hinge

Hardly rods of forks go (blocking crackers, agnails on rods, dirt in nests are jammed)

Clear the details which are worn out and deformed – replace

Hardly the sliding coupling on nave vents moves

Clear vents of dirt, cut agnails a file, replace details with the crumpled vents

Gear shifting forks are deformed

Replace forks

Transfers are spontaneously switched off

Springs of clamps lost elasticity, balls and/or nests of rods are worn-out

Replace worn-out details

Damage or wear of the blocking synchronizer rings

Replace rings

Damage or wear of teeths of the coupling or gear wreath of the synchronizer

Replace the coupling or a gear wheel

The synchronizer spring is broken

Replace a spring

Noise, crash, squeal of gear wheels at the time of transfer inclusion

• Coupling is switched off not completely

See Diagnostics of malfunctions of coupling

It is not enough oil in a transmission case

Add oil. Check whether there is no leak. Clean or replace сапун

Wear or breakage of teeths of gear wheels and/or synchronizers

Replace details

Wear or deformation of a ring of the synchronizer of the included transfer

Replace a ring

Axial side play of shaft of the transmission

Tighten fastenings of bearings, replace worn-out bearings

Oil leak

Wear of epiploons

Replace epiploons. If necessary clean or replace сапун transmissions

Strong wear, zaboina on surfaces of shaft on which epiploons work

Smooth out small damages a fine-grained skin and a zapoliruyta. Establishing a new epiploon, it is possible to nedopressovat a little it, without allowing a distortion (if necessary having enclosed under it remote laying up to 1 mm thick) that the edge of an epiploon worked by not worn-out part of a shaft. At considerable damages – replace shaft and epiploons

Elevated pressure in the transmission because of a contamination of a sapun

Clean or replace сапун transmissions

Fastenings of covers of a case of the transmission, coupling case weakened. Damage of laying

Tighten threaded connections. Replace laying (at their installation it is possible to use sealant)

Traffic jams are leaky wrapped

Tighten traffic jams (it is possible to put them on sealant)