Check And Adjust Fan Belt Tension - Hitachi Zaxis 33U-5A Operator's Manual

Check and Adjust Fan Belt Tension

--- every 100 hours (first time after 50 hours)
IMPORTANT: Loose fan belt may result in insufficient
battery charging, engine overheating, as well as
premature belt wear. Belts that are too tight, however,
can damage both bearings and belts.
Inspect
Check fan belt tension by depressing the midpoint between
fan pulley (1) and alternator pulley (2) by your thumb with
a depressing force of approximately 98 N (10 kgf, 22 lbf ).
Deflection : 7 to 9 mm
Visually check the belt for wear. Replace if necessary.
Adjust Fan Belt Tension
ZX33U-5A, 38U-5A
1. Remove bolts (4) from the right side of the seat. Remove
covers (3) to open the checking port.
2. Loosen adjusting bolt (6) and mounting bolt (7) of
alternator (5).
3. Adjust belt tension by moving alternator (5) forward or
backward.
4. Securely tighten bolts (6) and (7).
IMPORTANT: When a new belt is installed, be sure to re-
adjust 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.
MAINTENANCE
7-64
7 to 9 mm
1
3
5
98 N (10 kgf)
2
M589-07-014
4
MADB-07-030
MADB-07-031
6
5
7
MADB-07-032