4.2.1. Check of technical condition

Before survey of a detail of the transmission carefully clear. Remove with a brush or a scraper all deposits and clear openings and vents of possible pollution; then wash out to eliminate and dissolve all remains of oil.
Of a detail a stream of compressed air and accurately wipe with Obduyte them. Especially carefully blow bearings, directing a stream of compressed air so that there was no bystry rotation of rings.
Case and covers
On a case there should not be cracks, and on the surface of boring for bearings of wear or damages.
On the surfaces of interface to a coupling case, with back and lower covers there should not be damages to prevent a divergence of axes and the insufficient tightness causing oil leak. Smooth insignificant damages a file. If details are too damaged or worn-out, replace new.

Fig. 4-15. Coupling case interior. Red shooters specified nuts of fastening of a case of coupling to the transmission; the white arrow specified an opening in a forward cover for production of oil from a transmission case that there was no oiling of clutch plates

Check a condition of a forward cover and be convinced that the main shaft at rotation does not concern it. If not coaxiality of a shaft and cover is established, replace the damaged details. Check whether the drain opening of oil in a cover of a main shaft is littered (it is shown by an arrow in fig. 4-15). Clear a stopper of a drain opening.
Check epiploons and be convinced of absence of damage, unacceptable wear and roughnesses on working edges of epiploons. Wear of working edges of epiploons on width is allowed no more than 1 mm. At detection even of insignificant defect replace epiploons new.
On working surfaces and vents of a secondary shaft damages and excessive wear are not allowed; the flange of the elastic coupling has to slide freely without jammings on vents. On the surfaces of swing of needles on the forward end of a shaft there should not be roughnesses and zadir.
Check a condition of surfaces of swing of needles in an opening of a main shaft.
Check an intermediate shaft at which the vykrashivaniye or excessive wear of teeths is not allowed.
The surface of an axis of a gear wheel of a backing has to be absolutely smooth, without jamming traces. The size of an assembly gap between an axis and the plug of an intermediate gear wheel of a backing of 0,056-0,09 mm, a maximum permissible gap of 0,15 mm. Check the size of a gap, having measured diameters of an axis and the plug of a gear wheel. At new details diameters are equal: a gear wheel axis — 19,9+0,094 +0,079 mm, the internal diameter of the pressed plug — 20+0,07+0,05 mm.
Eliminate insignificant roughnesses on surfaces with a small emery cloth, at big damages and deformations replace a shaft new.
Gear wheels
On gear wheels damages or excessive wear of teeths are not allowed. Pay special attention to a condition of end faces of teeths on wreaths of synchronizers.
The spot of contact of gearing of teeths of gear wheels has to settle down on all working surface which has to be smooth and without wear tracks. Check a gearing gap between gear wheels which assembly size has to be 0,10 mm; extreme wear — a gap of 0,20 mm.
The assembly gap between the plug and a gear wheel of the I transfer and between a secondary shaft and gear wheels II and III transfers has to be 0,05–0,10 mm; extreme wear — a gap of 0,15 mm.
At the wear exceeding admissible limits, replace gear wheels new.
Ball or roller bearings have to be in a perfect state. Their radial gap should not exceed 0,05 mm.

Fig. 3-11. Vypressovyvaniye of the transmission shaft bearing from a bent shaft a pusher of A.40006

Having pressed fingers an internal ring to external, turn one of them in both directions, swing at the same time has to be smooth. On a surface of balls or rollers and paths of swing of rings damages are not allowed. Replace the damaged bearings new. When replacing the forward bearing of a main shaft use a pusher of A.40006 (see fig. 3-11); at the same time the flywheel can be not removed.
Rods and forks
Deformation of forks of gear shifting is not allowed. Rods have to slide freely without considerable gap in case openings.
Check a condition of blocking crackers of rods, springs and balls of clamps. Replace the details having traces of jamming or wear new.
Naves, couplings and the blocking rings of synchronizers
Check whether there are no jamming traces on naves of couplings of inclusion I–II and III–IV transfers, especially on the surfaces of sliding of couplings.
Pay special attention to a condition of end faces of teeths of couplings.
Excessive wear of a surface of the blocking rings is not allowed. They should be replaced if they rest an end face against the synchronizer coupling. Eliminate the possible roughnesses interfering free sliding velvet with a file. Replace the details which are worn out more admissible limits new.