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Description of the clutch assembly
The clutch is disengaged by a drive unit (lever (A) and spring) positioned on clutch cover. The drive unit
directly operates on clutch control pin (B) that, in its turn, operates the pressure plate (C) positioned at the
top of plate pack (D).
Drive is transmitted from the crankshaft to the gearbox primary shaft by a gear integrated with the clutch
housing/primary drive gear pair (A).
Accommodated in the clutch housing is a set of driving and driven plate pack (D). When the clutch is
operated, the driven plates push away a drum (3) which is splined onto the gearbox primary shaft.
Before working on the internal clutch parts, check that the clutch operates correctly. Then deal with the
problem in a systematic manner.
The following is a list of possible causes of clutch malfunction.
A clutch which does not disengage may be caused by:
excessive play of the control lever;
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distorted clutch plates;
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incorrect spring tension;
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faulty clutch release mechanism;
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excessive wear of the hub or clutch housing.
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A clutch which slips may be caused by:
no backlash of the control lever;
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worn clutch plates;
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weakened springs;
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faulty clutch release mechanism;
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excessive wear of the hub or clutch housing.
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A noisy clutch may be caused by:
excessive backlash between the primary drive gears;
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damaged primary drive gear teeth;
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excessive housing between driving plate tabs and the clutch housing;
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worn gear/clutch housing bearings;
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the presence of metal particles (filings) on the gear teeth.
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