Compressor HVAC: Testing and Inspection

INSPECTION

1. Check the plated parts of the disc & hub assembly for color changes, peeling or other damage. If there is damage, replace the clutch set.




2. Check the pulley bearing play and drag by rotating the pulley by hand. Replace the clutch set with a new one if it is noisy or has excessive play/drag.




3. Measure the clearance between the pulley (A) and the disc & hub assembly (B) all the way around. If the clearance is not within specified limits, remove the disc & hub assembly and add or remove shims as needed to increase or decrease clearance.

Clearance: 0.5 ± 0.15mm (0.020 ± 0.006 in.)

NOTE: The shims are available in eight thicknesses: 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm and 1.4mm




4. Check operation of the magnetic clutch.
Connect the compressor side terminals to the battery (+) terminal and the ground battery (-) terminal to the compressor body.
Check the magnetic clutch operating noise to determine the condition.