System Inspection

Drive Belt Installation:

Belt Tension Gauges:

Heater Controls:

1. Check Condenser Fins For Blockage Or Damage. If the fins are clogged, clean them with pressurized water.

CAUTION: Be careful not to damage the fins.

2. Make Sure That Drive Belt Is Installed Correctly. Check that the drive belt fits properly in the ribbed grooves.
3. Check Drive Belt Tension. Using a belt tension gauge, check the drive belt tension. Belt tension gauge:
Nippondenso BTG-20 (95506-00020) or
Borroughs No. BT-33-73F

Drive Belt Tension: New belt 150-180 lb, Used belt 90-130 lb

NOTE: "New belt" refers to a belt which has been used less than 5 minutes on a running engine."Used belt" refers to a belt which has been used on a running engine for 5 minutes or more.

4. Start Engine.
5. Turn On A/C Switch. Check that the A/C operates at each position of the blower switch.
6. Check Magnetic Clutch Operation. If the magnetic clutch does not engage, check the A/C fuse.
7. Check That Idle Increases. When the magnetic clutch engages, engine revolutions should increase.

Standard idle-up: 900-1,000rpm

8. Check That Condenser Fan Motor Rotates.
9. Check The Amount Of Refrigerant. If you can see bubbles in the sight glass, additional refrigerant is needed.
10. If No Or Insufficient Cooling, Inspect For Leakage. Using a gas leak detector, inspect each component of the refrigeration system.
11. Inspect Heater Control Operation. Move the control levers right and left, and check for stiffness and binding through the levers full range of operation.