Clutch Drive Hub

R-4 Compressor Component View:

Clean
^ The compressor with solvent and blow dry with air

Remove or Disconnect

Tools Required:
J 9399 Thin Wall Socket
J 25008-A Holding Fixture
J 25030 Clutch Hub Holding Tool
J 34019 Clutch Plate and Hub Assembly Remover

Compressor In J 25008-A Holding Fixture:

^ Clamp J 25008-A to the compressor.
^ Mount J 25008-A and the compressor in a vise.

Removing The Shaft Nut:

1. Shaft nut (1) with J 9399.
^ Hold the clutch plate and hub assembly (3) with J 25030.

Clutch Plate And Hub Removal:

2. Clutch drive hub (3).
^ Thread J 34019 into the clutch plate and hub assembly (2).

Important
^ Do not drive or pound on the clutch hub or the shaft. This may cause internal damage.
^ Make sure the contact surfaces of the clutch plate and the pulley are clean.
^ Align the shaft key with the shaft key way and place the clutch plate and hub assembly onto the compressor shaft.

^ Hold the body of J 34019 with a wrench and turn the center screw into the remover body.
3. Shaft key (2).
^ Retain the shaft key (2) if usable.

Inspect
^ All parts and replace if necessary.

Install or Connect

Tools Required:
J 9399 Thin Wall Socket
J 9408-B Clutch Plate and Hub Installer
J 25030 Clutch Hub Holding Tool

Installing The Shaft Key:

1. Shaft key (2).
^ Allow the shaft key (21) to extend 4.8 mm (3/16-inch) out of the key way.
^ The shaft key (2) is curved slightly to give an interference fit in the groove.

Installing The Clutch Plate & Hub Assembly:

2. Clutch drive hub (3).
^ Install J 9480-B.
^ Hold the hex portion of J 9480-B with a wrench and tighten the center screw to press the hub onto the shaft until there is a 0.5-1.0 mm (0.20-.040-inch) air gap between the frictional surfaces of the clutch plate and clutch rotor.
^ Remove J 9480-B.

2. Shaft nut (1) with J 9399.
^ Use J 25030 to hold the clutch plate and hub assembly.

Tighten
^ Shaft nut (1) to 17 N.m (13 ft. lbs.). Hand spin the pulley (11) to check for free rotation.