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2
Check Fan Belt --- every 10 hours
Check the fan belt for any abnormality. If any cracks are found,
replace the belt with a new one.
3
Check Fan Belt Tension --- every 250 hours
ZW220 and ZW250
IMPORTANT: Loose fan belt may result in insufficient bat-
tery charging, engine overheating, as well as
a rapid abnormal belt wear. An excessively
tight belt, however, can damage both water
pump and alternator bearings and fan belts.
Check fan belt tension by depressing the midpoint between
tension pulley (1) and alternator pulley (2) with the thumb.
Deflection must be 8 to 12 mm with a depression force of ap-
proximately 98 N (10 kgf ).
ZW180 and ZW310:
Fan belt tension on ZW180 and ZW310 is automatically ad-
justed.
4
Adjust Fan Belt Tension --- every 500 hours (or when-
ZW220 and ZW250
1. Loosen the adjustment plate of alternator (3) and the
mounting bolt of alternator (4).
2. Move alternator (5) backward or forward until belt ten-
sion is correct.
3. Securely tighten the bolt.
NOTE: When a new belt is installed, be sure to readjust the
tension after operating the engine for 3 to 5 minutes
at slow idle speed to be sure that the new belt is seated
correctly.
ZW180 and ZW310
Fan belt tension on ZW180 and ZW310 is automatically ad-
justed.
MAINTENANCE
ever the slack is found)
2
4
7-68
1
M4GB-07-082
5
M4GB-07-083
3
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