Yanmar YM155d Service Manual page 150

Remedy
Replace.
Replace.
Replace.
Adjust o r replace.
Replace.
4.
CLUTCH AND RELATED ITEMS
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Oil adhered t o f r i c t i o n disc.
1
Clean
Probable cause
1. Faulty brake shoe springs; excessive
wear; uneven wear.
2.
Uneven brake drum wear; foreign
matter infiltrated i n t o drums.
3.
Excessive wear of brake shaft rod.
1. Faulty parking brake lever, claws
worn.
1. Return spring.
1. Return sprlng worn or damaged.
Trouble
3. Release sleeve bearing seized.
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Friction disc worn.
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Replace.
3 .
4.
5 .
6.
Remedy
Replace.
Adjust.
Replace.
N o clearance between release
lever and release bearing.
2.
Clutch rod:
1. Return spring worn or damaged.
Vibration can be
f e l t through the
brake pedals.
Parking brake does
n o t work.
Parking brake does
n o t return when re
leased.
Brake pedals d o n o t
return.
Probable cause
1. Friction disc scored or burned.
2. N o effective clutch rod stroke.
Trouble
2.1 c l u t c h slius.
I
I. clutch:
Adjust.
7.
Adjust.
Replace.
Clutch does n o t
disengage.
n o t reNrn.
4.
/
Power transmission
1
1. Friction
late:
I I
isenough.
I
unevenwear of facings.
/
Replace.
5.
Pedals are loose.
I - - -
Torsion springs worn o r damaged.
2. Flywheel:
Face is rough and uneven.
1. Rod shaft " 0
rings worn:
Rod is bent.
1. Main drive shaft o r s ~ l i n e s worn. 6.
2. Friction disc loose (from rivet
sections.
3.
Flywheel and n u t loose.
Strange noises heard
f r o m the vicinity of
clutch (when em
gaged)
Replace.
Replace.