CLUTCH
KUKJE MACHINERY CO., LTD.
46
4. CHECKING, DISASSEMBLEING AND SERVICING
<4>SERVICING
< Backlash between clutch disc and clutch shaft >
1. Mount the clutch disc onto the propeller shaft.
2. Hold the propeller shaft so that it does not
rotate.
3. Slightly move the disc and measure the
displacement around disc edge.
4. If the measurement exceeds the allowable limit,
replace clutch disc.
Displacement around
disc edge
Allowable
limit
2.0 mm
0.079 in.
< Clutch disc wear >
1. Measure the depth from clutch disc surface to
the top of rivet at least 10 point with a depth
gauge.
2. If the depth is less than the allowable limit,
replace the disc.
3. If oil is sticking to the clutch disc, or disc surface
is carbonized, replace the clutch disc.
Disc surface to
rivet top (Depth)
Allowable
limit
0.3 mm
0.012 in.
< Clutch disc wear >
1. Place a straightedge on the pressure plate and
measure clearance with a feeler gauge at several
points.
2. If the clearance exceeds the allowable limit,
replace it.
3. When the pressure plate is worn around its
outside and its inside surface only is in contact
with the straightedge, replace even if the
clearance is within allowable limit.
Clearance between
pressure plate and
straightedge
Allowable limit
0.2 mm
0.008 in.
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