Check Air Conditioner Condenser; Check Air Conditioner Drive Belt - Hitachi ZW 310-6 Operator's Manual

Check Air Conditioner Condenser

--- every 6 months
If condenser (1) is covered with dirt and/or insects, air
conditioner cooling performance will be reduced.
Remove dirt or stain from fins of condenser (1) using tap water.
If the condenser has been severely contaminated, use a soft
brush. Do not use a hard brush, which may damage the fins.

Check Air Conditioner Drive Belt

--- every 6 months
Check the belt for abnormal deflection and damage.
Check drive belt tension by depressing the midpoint shown
with  mark in the illustration by using tension gauge.
Belt tension: 343±49 N (35±5 kgf )
f
NOTE: The belt tension should be 490±98 N (50±10 kgf,
110±22 lbf) when the belt is replaced with new one.
Belt Tension Adjustment Procedure
1. Loosen lock nut (2) of tension pulley (4).
2. Remove plate (5) and move tension pulley (4) to adjust
belt tension by turning belt tension adjustment bolt (3).
3. Securely tighten lock nut (2) and install plate (5).
Tightening torque: 30.4 to 31.4 N·m (3.1 to 3.2 kgf·m)
MAINTENANCE
7-117
1
4 2 3
90Z7B-7-103-1
5
90Z7B-7-103-2