Operation and maintenance manual

Section 260-0130
Operators Compartment - Air Conditioning
SM 1405 Rev 2 11-04
12
AIR CONDITIONING DIAGNOSIS
TABLE158
CONDITION PROBLEM REMEDY
1. Belt Trouble
Slipping
Excessive wear
Loose
Overcharge
Air in system
Pulley not aligned
Belt too tight
Bad idler bearing
Belt wrong width
Adjust belt to 12 mm (0.5 in)
depression
Correct the charge
Evacuate and re-charge
Align Pulley
Adjust or replace
Replace idler bearing
Replace with correct belt
2. Vibration/Noise in Compressor
area
Vibration/noise
Vibration
Noise with clutch engaged
Noise with clutch engaged or
disengaged
Noise
Chatter/Knock
Stuck compressor or clutch
Overcharge
Air in system
Compressor mounting or belts loose
Drive pulley loose
Belt tension incorrect
Faulty compressor
Faulty clutch bearing
Clutch loose
Clutch rubbing field coil
Faulty belt
Compressor oil level low
Valve plate broken
Replace
Correct the charge
Evacuate system and re-charge
Tighten
Tighten
Correct tension
Replace compressor
Replace bearing
Tighten
Align clutch
Replace belt
Add oil
Repair or replace