Check Air Conditioner Condenser; Check Air Conditioner Compressor Belt; Compressor Belt Tension Adjustment Procedure - Hitachi ZW 550-6 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 foreign material from fins of condenser (1)
using tap water. In case the condenser has been severely
contaminated, use a soft brush or a plastic fin comb tool.
Do not use a hard brush, which may damage the fins.

Check Air Conditioner Compressor Belt

--- every 6 months
Check the belt for abnormal deflection and damage. Check
HVAC belt tension by using tension gauge.
Belt tension: 412±49 N (42±5 kgf, 93±11 Ibf )
f
NOTE: The belt tension should be 588±98 N (60±10 kgf,
132±22 lbf) when the belt is replaced with new one.

Compressor Belt Tension Adjustment Procedure

1. Loosen lock nuts (2, 6) of tension pulley (4).
2. Remove plate (5) and tension pulley (4) to adjust belt
tension by turning belt tension adjustment bolt (3).
3. After adjustment, securely tighten lock nuts (2, 6) and
mount plate (5).
Nut (2): 52.5 N·m (5.35 kgf·m, 38.7 lbf·ft)
MAINTENANCE
7-102
1
115Z7B-7-102-1
95Z7-7-92-2