Sanden AC Compressor Service Operations Clutch and Shaft Seal
This page explains the service operations in the clutch and shaft seal of a Sanden AC Compressor.
Service Operations Clutch
Armature Assembly Installation
1. Install the shaft key with pliers.
2. Install the clutch shims.
NOTE: The clutch air-gap is determined by the thickness of the shim. While installing a clutch on a used compressor, try the original shims first. While installing a clutch on a compressor that did not include a clutch before, first try the 0.04", 0.02", and 0.004" (1.0, 0.5, 0.1 mm) shims.
3. Align the keyway in the armature assembly to the shaft key. Using a driver and hammer, or an arbor press, drive the armature assembly down over the shaft until it bottoms on the shims. A distinct sound change will be heard if you are using a hammer to drive the armature assembly.
4. Replace the retaining nut and torque to the requisite specification:
1/2-20: 20-25 ft·lb (27-34 N·m, 270-350 kg·cm)
M8: 11-15 ft·lb (15-21 N·m, 150-210 kgf·cm)
5. Check the air-gap with a feeler gauge. The specification is 0.016" - 0.031" (0.4 - 0.8mm). If the gap is not even around the clutch, gently tap down at the high spots. If the overall gap is out of spec, remove the armature assembly and change the shims as necessary.
6. Replace the armature dust cover (if used) and torque 3 or 6 bolts to the specifications mentioned below:
3 - 1/4-20 bolts (SD-5):
2-4 ft•Ib (2-5 N•rn, 25-50 kgf•cm)
6 - M5 bolts (SD-7): 5-8 ft•Ib
(7-11 N•rn, 70-110 kgf•cm)
Note: Over-torquing SD508/SH14 dust cover bolts will cause the air-gap to become out-of-spec.
Service Operations - Shaft Seal
Replacement of Lip Type Shaft Seal (SD5H14, SD7B10, SD7H13, SD7H15)
NOTE: A lip seal assembly and felt ring must never be reused. Always replace these components.
You can find a detailed description on this specific topic in this link: Sanden AC Compressor Service Operations Shaft.
If you are looking for some other repair or install procedures related to the Sanden Compressor, you can refer to this link.
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Why buying a quality AC Compressor is important
A properly functioning air-conditioning system keeps the passenger compartment cool by circulating cool air. Without an AC in your vehicle, especially during summer, your driving experience will be stuffy and uncomfortable. The AC system includes the compressor, condenser and evaporator. The AC compressor compresses the refrigerant and this is the first step for any AC cycle to start. Only when the compressor pumps the refrigerant at the right pressure, the remaining components in the AC loop will function up to their optimum. Therefore, any problem with the compressor will degrade the entire performance of your AC system.
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