Servicing - Kubota B1830 Workshop Manual

B1830,B2230,B2530,B3030, WSM

[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.
Displacement around
Allowable limit
disc edge
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.
Disc surface to rivet top
Allowable limit
(Depth)
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.
Clearance between
pressure plate and Allowable limit
straight edge
A: Inside
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.
Checking Clutch Release Bearing
1. Check the clutch release bearing. If surface is worn excessively,
or abnormal sounds occur, replace it.
2-S12
CLUTCH
2.0 mm
0.079 in.
9Y1210003CLS0017US0
0.3 mm
0.012 in.
9Y1210003CLS0018US0
0.2 mm
0.008 in.
B: Outside
9Y1210003CLS0019US0
9Y1210003CLS0020US0
9Y1210003CLS0021US0
KiSC issued 05, 2012 A