Kubota B1830, Workshop Manual

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CLUTCH B1830,B2230,B2530,B3030, WSM
2-S12
[3] 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
the disc edge.
4. If the measurement exceeds the allowable limit, replace the
clutch disc.
9Y1210003CLS0017US0
Clutch Disc Wear
1. Measure the depth from clutch disc surface to the top of the rivet
at least 10 points with a depth gauge.
2. If the depth is less than the allowable limit, replace the disc.
3. If oil is sticking to clutch disc, or disc surface is carbonized,
replace the disc.
9Y1210003CLS0018US0
Pressure Plate Flatness
1. Place a straight edge 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 straight edge, replace
it even if the clearance is within the allowable limit.
9Y1210003CLS0019US0
Checking Pressure Plate and Diaphragm
1. Check the pressure plate and if scratched on its surface, correct
with sandpaper or replace.
2. Check the diaphragm for crack and scratches. If defects are
found, replace it.
9Y1210003CLS0020US0
Checking Clutch Release Bearing
1. Check the clutch release bearing. If surface is worn excessively,
or abnormal sounds occur, replace it.
9Y1210003CLS0021US0
Displacement around
disc edge
Allowable limit
2.0 mm
0.079 in.
Disc surface to rivet top
(Depth)
Allowable limit
0.3 mm
0.012 in.
Clearance between
pressure plate and
straight edge
Allowable limit
0.2 mm
0.008 in.
A: Inside B: Outside
KiSC issued 05, 2012 A