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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C Compressor Overhaul >> HARRISON R-4 Shaft Seal R & I >> Installation

HARRISON R-4 Shaft Seal R & I: Installation

  1. Lubricate new "O" ring with refrigerant oil and install "O" ring on "O" Ring Installer (J-33011). Insert "O" ring installer in compressor until it bottoms.
  2. Move slide on "O" ring installer downward until "O" ring is released into groove. Rotate installer to seat "O" ring.
  3. Coat shaft seal with refrigerant oil. Install seal on shaft seal remover/installer. Expand seal using shaft seal remover/installer.
  4. Install Shaft Seal Protector (J-34614) through seal. Seal must be installed on shaft seal protector so seal lip will be installed toward compressor. Remove shaft seal remover/installer.
  5. Install shaft seal protector over end of compressor shaft. Push shaft seal into compressor until it bottoms. Install NEW shaft seal retaining snap ring with flat side against seal.
  6. Install crankshaft key, allowing key to protrude approximately 3/16" from rear of clutch plate. Install clutch plate on compressor crankshaft.
  7. Using Clutch Plate Installer (J-9401-B), press clutch plate on compressor to achieve a clearance between clutch plate and rotor of .020-.040" (.50-1.00 mm).
  8. Using spanner, install NEW crankshaft nut and tighten to 10 ft. lbs. (14 N.m). Check components for proper rotation. Install compressor. Evacuate and recharge system. Check for leaks.
Fig 1: Exploded View of Harrison R-4 4-Cylinder Compressor
G104026Courtesy of GENERAL MOTORS CORP.
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