Kubota WSM L3560, Workshop Manual

Page: 273 / 801

CLUTCH
L3560, L4060, L4760, L5060, L5460, L6060, WSM
2-S28
7. SERVICING
[1] MANUAL TRANSMISSION AND GST
Backlash between Clutch Disc Boss and Gear Shaft
1. Mount the clutch disc to the gear shaft.
2. Hold the gear shaft so that it may not turn.
3. Rotate disc lightly and measure the displacement around the
disc edge.
4. If the measurement exceeds the allowable limit, replace the
disc.
9Y1210824CLS0029US0
Thrust Ball Bearing
1. Remove the thrust ball bearing from release hub with a puller.
2. Check for abnormal wear on contact surface.
3. Hold bearing inner race and rotate outer race, while applying
pressure to it.
4. If the bearing rotation is rough or noisy, replace the bearing.
NOTE
• Do not depress outer race, while installing thrust ball
bearing.
9Y1210824CLS0030US0
Clutch Disc Wear
1. Measure the depth from clutch disc surface to the top of 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.
In this case, inspect transmission gear shaft oil seal, engine rear
oil seal and other points for oil leakage.
9Y1210824CLS0031US0
Checking Pressure Plate Assembly and Flywheel
1. Wash the disassembling parts except clutch disc with a suitable
cleaning solvent to remove dirt and grease before making
inspection and adjustment.
2. Check friction surface of pressure plate and flywheel for scoring
or roughness.
• Slight roughness may be smoothed by using fine emery
cloth.
• If these parts have deep scores or grooves on their surface,
they should be replaced.
3. Check the surface of the diaphragm spring for wear.
If excessive wear is found, replace clutch cover assembly.
4. Inspect thrust rings (wire ring) for wear or damage. As these
parts are invisible from outside, shake pressure plate assembly
up and down to listen for chattering noise, or lightly hammer on
rivets for a slightly cracked noise. Any of these noises indicates
need of replace as a complete assembly.
9Y1210824CLS0032US0
Displacement around
disc edge
Allowable limit
2.0 mm
0.079 in.
Disc surface to rivet top
(Depth)
Allowable limit
0.3 mm
0.01 in.
Diaphragm spring mutual
difference
Allowable limit
0.5 mm
0.02 in.
KiSC issued 03, 2016 A