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2.3. Diagnostics of malfunctions of the transmission

Cause of defect

Elimination method

Noise in the transmission Noise decreases or disappears if to squeeze out coupling
Insufficient level of oil in a transmission case Check level, if necessary add oil. Check whether there is no leak. If necessary clean or replace сапун

Wear or damage of bearings, teeths of gear wheels

Replace worn-out bearings, gear wheels

Transfers join hardly, extraneous noises are absent

Wear of the lever of gear shifting, spherical washer, screw of restriction of the cross course of the lever, deformation of the lever

Replace the worn-out and deformed details

Jamming of the spherical hinge of the lever of gear shifting

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

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

Replace the worn-out and deformed details

Hardly the sliding coupling on nave vents moves

Clear vents of dirt, cut agnails a file

Gear shifting forks are deformed

Replace forks

Coupling is not switched off

See Diagnostics of malfunctions of coupling

There is no fixing of the lever in situation "neutral" between III and IV transfers

The ottyazhny spring of the lever came off or is broken

Establish a spring into place

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 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 cuffs

Replace cuffs. If necessary clean or replace сапун transmissions

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

Smooth out small damages a fine-grained skin and a zapoliruyta. Establishing a new cuff, 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 a cuff worked by not worn-out part of a shaft. At considerable damages – replace shaft and cuffs

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 of discharge and filling of oil are leaky wrapped

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