Kubota L4400 Workshop Manual page 157

L4400 , WSM
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
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.
Disc surface to rivet top
(Depth)
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
Diaphragm spring
mutual difference
A : Inside
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.
Clearance between
pressure plate and
straightedge
A : Inside
2-S13
0.3mm
Allowable limit
0.012 in.
0.5 mm
Allowable limit
0.020 in.
B : Outside
0.2 mm
Allowable limit
0.008 in.
B : Outside
CLUTCH
W1024724
W1025142
W1018116
KiSC issued 07, 2007 A