2-S13
L4400 , WSM
CLUTCH
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 clutch disc.
In this case, inspect transmission gear shaft oil seal, engine rear
oil seal and other points for oil leakage.
W1024724
Checking Pressure Plate Assembly and Fluwheel
1. Wash the disassembling parts except clutch disc with a suitable
cleaning solvent to remove dirt and grease before making
inspection and adjustment.
2. Inspect the 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. Inspect the surface of diaphragm spring for wear.
If excessive wear is found, replace the 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
W1025142
Pressure Plate Flatness
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 the allowable limit.
W1018116
Disc surface to rivet top
(Depth)
Allowable limit
0.3mm
0.012 in.
Diaphragm spring
mutual difference
Allowable limit
0.5 mm
0.020 in.
A : Inside
B : Outside
Clearance between
pressure plate and
straightedge
Allowable limit
0.2 mm
0.008 in.
A : Inside
B : Outside
KiSC issued 07, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland