Check Drive Belt - Hitachi ZW 370-6 Operator's Manual

Check Fan Drive Belt
--- every 10 hours (daily)
Adjust, Replace --- as necessary
Press the center of the belt with a hand, and check whether
the belt deflects only slightly.
Also, check the belt for a damage.
Measurement of Deflection Amount and Vibration
Frequency
1. Press the middle of the belt with a force of 98 N (approx.
10 kgf/22 lbf ), and check whether the amount of
deflection is within the following range.
Fan belt deflection value: 6~8 mm (0.2~0.3 in)
2. When the value is not within the range, adjust the
tension.
3. Check the belt for a damage such as a scratch and crack.
4. When the belt adjusting allowance is no longer
available, when crack, damage or abnormal wear is
found, or when the belt squeaks during driving even
after the belt tension has been adjusted, replace the
belt.
Adjusting Fan Belt
1. Loosen idler pulley's lock nut (1).
m (1): 137~157 N·m (14~16 kgf·m, 101~116 lbf·ft)
2. Turn the generator and idler pulley adjusting bolts (2,
3) to adjust the belt tension to be within the standard
value range.
3. After the adjustment, firmly tighten loosened lock nut
(1) to the specified torque.
MAINTENANCE
7-73
Generator
95Z7-7-68-1
95Z7-7-68-2