A/c Compressor Servicing GMC Pickup R1500

HARRISON A-6 6-CYLINDER

Removal

1. Using Compressor Fixture (J-9396), mount compressor in a vise. Using Clutch Plate Spanner (J-25030), remove crankshaft nut. Using Clutch Plate Remover (J-9401), remove clutch plate. Remove clutch plate key.
2. Remove pulley assembly snap ring. Using Shaft Protector (J-9395) and commercial puller (if necessary), remove pulley assembly. Remove snap ring, disconnect electrical wiring and remove clutch coil. Inspect all parts for damage.

Installation

1. Install clutch coil and snap ring. Install pulley assembly and snap ring. Install clutch plate key in clutch plate, allowing key to protrude about 3/16" out rear of clutch plate.
2. Install clutch plate on compressor crankshaft aligning key. Using Clutch Plate Installer (J-9480-B), press clutch plate on compressor to achieve a clutch assembly clearance of .022-.057" 56-1.34 mm). Using spanner, install crankshaft nut and tighten to 20 ft. lbs. (27 N.m). Turn pulley and clutch plate by hand to check for free rotation.

Exploded View of Harrison A-6 6-Cylinder Compressor. Scheme 29

1. Remove clutch plate and shaft key. Pry out dust seal (if equipped). Remove seal seat snap ring.
2. Using Seal Seat Remover (J-23128-A) for ceramic type or (J-9393-A) for steel type, remove seal seat. Using Seal Remover (J-9553-01), remove "O" ring seal.
3. Using Shaft Seal Remover/Installer (J-9392-01), remove shaft seal by turning remover/installer slightly clockwise to disengage tangs and pull out shaft seal. Clean all surface areas.

1. Coat new shaft seal with refrigerant oil and install shaft seal on remover/installer. Align compressor shaft machine surface with shaft seal and install. Turn remover/installer slightly counterclockwise to secure shaft seal tangs.
2. Using Seal Installer (J-33011), install "O" ring and coat with refrigerant oil. Coat seal seat with refrigerant oil and install using seal seat remover/installer. Install snap ring. Install dust seal (if supplied in seal kit). To complete installation, reverse removal procedure.

1. Using Clutch Plate Spanner (J-33027), hold clutch plate and remove nut. Thread Clutch Plate Remover/Installer (J-33013-B) into clutch plate and remove clutch plate.
2. Remove clutch plate key. Remove snap ring and remove pulley assembly. Disconnect clutch coil electrical wiring. Scribe marks on compressor and clutch coil for installation reference. Using Puller Adapter (J-33023-A) and 2-jaw puller, remove clutch coil. Inspect all parts for damage and replace as necessary.

1. Align scribe marks. Using Puller Adapter (J-33024), Puller Bar (J-8433-1) and Compressor Fixture (J-34992), Compressor Fixture (J-33026) on HR-6, press clutch coil on compressor. Restake clutch coil inner ring in 3 places. Install pulley assembly and install snap ring. Install clutch plate key in clutch plate, allowing key to protrude approximately 1/8" out rear of clutch plate.
2. Install clutch plate on compressor crankshaft aligning key. Using remover/installer, press clutch plate on compressor to achieve a clutch assembly clearance of .015-.025" (.38-.64 mm). Using spanner, install crankshaft nut and tighten to 12 ft. lbs. (17 N.m). Turn pulley and clutch plate by hand to check for free rotation.

Exploded View of Harrison HR-6 6-Cylinder Compressor. Scheme 30

Exploded View of Harrison V5 5-Cylinder Compressor. Scheme 31

Remove clutch plate. Using Snap Ring Pliers (J-5403), remove shaft seal snap ring. Install Shaft Seal Protector (J-34614) on crankshaft. Insert Shaft Seal Remover/Installer (J-23128-A) into shaft lip seal, tighten handle and remove shaft seal. Using "O" Ring Remover (J-9553-01), remove "O" ring. Clean and inspect all parts.

1. With shaft seal protector in place, lubricate new "O" ring with refrigerant oil and install "O" ring on "O" Ring Installer (J-33011). Insert installer in compressor until it bottoms. Lower installer slide until "O" ring is released into groove. Rotate installer to seat "O" ring.
2. Dip lip seal in refrigerant oil and place on remover/installer. Push lip seal into compressor until bottomed. Release seal. Install snap ring with flat side against lip seal. To complete installation, reverse removal procedure.

Removal (Poly-Groove & "V" Groove Drive)

1. Mount compressor to Holding Fixture (J-25008-A) and secure in a vise. Using Clutch Plate Spanner (J-33027), remove crankshaft nut. Using Clutch Plate Remover (J-37707), remove clutch plate. Remove pulley assembly retaining ring.
2. On "V" groove drive, remove pulley rim mounting bolts and washers. Install Puller Guide (J-25031) on compressor. Using internal-jaw puller, remove pulley assembly from compressor.
3. On poly-groove drive, install Clutch Plate Puller (J-33021) over Puller Guide (J-25031). Pull clutch plate from compressor. Using internal-jaw puller, remove pulley assembly from compressor.
4. Remove clutch coil electrical wiring. Scribe marks on compressor and clutch coil for installation reference. Using Puller Guide (J-25031) and 2-jaw puller, remove clutch coil. Inspect all parts for damage and replace as necessary.

1. Using Puller Adapter (J-33024), Puller Bar (J-8433-1) and Compressor Fixture (J-25008-A), press clutch coil on compressor. Restake clutch coil inner ring in 3 places and connect electrical wiring.
2. Use Pulley Assembly Installer (J-26271-A), Installer Handle (J-29886) and hammer to drive pulley assembly on compressor. On "V" groove drive, use thread sealant on pulley rim mounting bolts. On all models, ensure clutch coil terminals are aligned correctly and locating tabs is aligned with front head locator holes. Install retaining ring.
3. Install clutch plate key in clutch plate, allowing key to protrude approximately 3/16" out rear of clutch plate. Install clutch plate on compressor crankshaft aligning key. Using Clutch Plate Installer (J-9480-B), press clutch plate on compressor to achieve a clutch assembly clearance of .020-.040" (.50-1.00 mm). Using spanner, install crankshaft nut and tighten to 10 ft. lbs. (14 N.m). Turn pulley and clutch plate by hand to check for free rotation.

Remove clutch plate. Using Snap Ring Pliers (J-5403), remove shaft seal snap ring. Install Shaft Seal Protector (J-34614) on crankshaft. Insert Shaft Seal Remover/Installer (J-23128-A) into shaft lip seal, tighten handle and remove shaft seal. Using "O" Ring Remover (J-9553-01), remove "O" ring. Clean and inspect all parts.

1. With shaft seal protector in place, lubricate new "O" ring with refrigerant oil and install "O" ring on "O" Ring Installer (J-33011). Insert installer in compressor until it bottoms. Lower installer slide until "O" ring is released into groove. Rotate installer to seat "O" ring.
2. Dip lip seal in refrigerant oil and place on remover/installer. Push lip seal into compressor until bottomed. Release seal. Install snap ring with flat side against lip seal. To complete installation, reverse removal procedure.

Scheme 32

1. Using Clutch Plate Spanner (J-33027) and a thin-wall socket, remove crankshaft bolt. Using Clutch Plate Remover (J-37252), remove clutch plate. Remove clutch plate shims. (Scheme 33)
2. Remove pulley assembly snap ring. Using a plastic hammer, tap pulley assembly off compressor. Remove snap ring and remove clutch coil. Inspect all parts for damage.

Scheme 33

Install clutch coil and snap ring. Install pulley assembly and snap ring. Install clutch plate shims. Install clutch plate and bolt. Hold clutch plate with spanner and tighten bolt to 10 ft. lbs. (14 N.m). Using a feeler gauge, check clutch assembly clearance. Proper clearance is .014-.026 (.36-.66 mm). If clearance is not correct, remove or add shims.

1. Remove clutch plate, pulley assembly and clutch coil. Using a 6 mm Allen wrench, remove 5 compressor through bolts. Pull front head from compressor using care not to scratch sealing surface.
2. Reach down inside front head and remove felt seal and retainer. Remove "O" ring. Remove shaft seal snap ring. Push shaft seal from head. Inspect front head for damage to sealing surface. Replace if necessary.

1. Lubricate new "O" ring with refrigerant oil and install. Press seal into front head. Install felt seal and retainer.
2. Install a well lubricated Shaft Seal Protector (J-34614) on crankshaft. Install a new front head "O" ring on compressor housing and coat with refrigerant oil.
3. Position front head on compressor aligning dowel pins. Use care when guiding shaft seal protector through seal opening. Remove shaft seal protector. Install 5 compressor through bolts using new brass washers. Diagonally tighten bolts to 18 ft. lbs. (24 N.m). To complete installation, reverse removal procedure.