Check And Adjust Fan Belt Tension - Hitachi Zaxis 200LC Operator's Manual

Check and Adjust Fan Belt Tension

1. .
IMPORTANT: Loose fan belt may result in insufficient
battery charging, engine overheating as
well as a rapid, abnormal belt wear.
Belts that are too tight, however, can
damage both bearings and belts.
Visually check belt for wear. If necessary, replace belt.
2. Check fan belt tension by depressing the midpoint
between fan pulley and alternator pulley with the
thumb. Deflection must be 8 to 12 mm (0.32 to 0.47
in.) with a depressing force of approximately 98 N (10
kgf, 22 lbft)
Specification
Fan Belt—Deflection ....................................
Specification
Fan Belt—Force ........................................................
3. If tension is not within specifications, loosen bolts for
adjusting plate and alternator bracket. Move alternator
till tension is correct.
4. Tighten adjusting plate and alternator bracket.
NOTE: When a new belt is installed, be sure to re-adjust
tension after operating engine for 3 to 5 minutes
at slow idle speed to be sure that new belt is
seated correctly
Maintenance—Every 1000 Hours
8 to 12 mm (0.32 to 0.47 in.)
98 N (10 kgf, 22 lbft)
3-10-7
OUT1739,0000225 –19–16JUN06–1/1
081407
PN=144