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2.6. Diagnostics of malfunctions of coupling

Coupling revolves

The free wheeling of a pedal of coupling is insufficient. Check, make adjustment.

The coupling switching off mechanism is faulty. Check, make necessary repair.

It is faulty the main or executive cylinders of coupling. Check, execute capital repairs of hydraulic system of the drive of coupling.

The working surface of the conducted clutch plate is worn-out. Check, replace a disk if its frictional slips are worn-out to less than 0.3 mm of an eminence over heads of rivets (see an accompanying illustration).

The servo-driver block (model of 4.2 l) is faulty. Check, in case of need replace.

Usually the first sign of pro-slipping of coupling is noticeable causeless increase in turns of the engine at capture of steep slopes. For check of a condition of coupling firmly cock the parking brake, prop up car wheels wedges and establish transmission in the provision of the highest transfer, then at average turns of the engine slowly release coupling. If the engine at the same time does not decay, coupling pro-slipping takes place. In order to avoid more serious damages of coupling it is necessary to execute immediately check and to make necessary repair or replacements.

Breakthroughs and vibrations of coupling take place

Working surfaces of the conducted disk are polluted by oil. Check, in case of need replace a disk. Find a source of leak and remove its cause.

Weakened, or the nave of the conducted disk is damaged. Check, replace a disk.

Fastening of frictional overlays of the conducted disk weakened. Check, replace a disk.