um UXPW125 User Manual

UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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6.2. Clutch (technical specifications)
Clutch Unit：mm
Item
Standard Value
Service Limit
Clutch
Clutch Spring Free Length
41.1-41.9
40
Friction Plate Thickness
2.92-3.08
2.6
Flatness of clutch driven plate
0.20
Driven gear inner hole diameter
Φ23.000～φ23.021
φ23.08
Shaft sleeve
Collar diameter
Φ22.960～φ22.975
Φ22.93
Bushing aperture
Φ16.990～φ17.008
φ17.04
The spindle diameter
Φ16.966～φ16.984
Φ16.95
6.3. Tightening torque requirements
Clutch Locking Nut: 74N.m
Crankshaft Locking Nut: 64N.m
Balance tooth locking nut: 64N.m
Five-star plate fastening bolts: 12N.M
Positioning plate fastening Bolts: 12N.M
Clutch lid fastening Bolts: 12N.m
Pump impeller fastening Torque: 12N.m
6.4. Troubleshooting
6.4.1. Clutch does not release or not fully release.
• Control arm improper free travel.
• Damaged control arm, declutch bearing or pushing rod.
• Severely deformed drive friction plate of clutch.
• Lock-up of separate shaft sleeve, separate washer and driven gear.
• Severely worn outer case of clutch.
6.4.2. Clutch skids:
• Severely worn friction plates.
• Seizure of clutch mechanism.
• Control arm Improper free travel.
6.4.3. Gearshift becomes difficult and seized.
• Clutch does not disengage thoroughly.
• Gearshift arm bends, deforms and severely wears.
• Fork plate of gearshift arm deforms and doesn’t return; Break of spring of
locating plate.

um UXPW125 Specifications

General

Brand	um
Model	UXPW125
Category	Engine
Language	English