Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Compressor Shaft Seal: Service and Repair
Delco Air DA-6 & Hr-6 Compressor
Removal
1.
Discharge A/C system and loosen and reposition compressor in brackets.
2.
Refer to ``Compressor Clutch Plate & Hub Assembly'' procedure, and remove clutch plate and hub.
3.
Remove shaft seal retaining ring.
4.
Clean inside of compressor neck area around shaft, seal seat and shaft to prevent damage to compressor from entry of dirt.
5.
Place seal protector J-33021 over end of shaft to avoid chipping ceramic seat. Engage knurled tangs of seal seat remover/installer J-23128-A into
recessed portion of seal seat by turning handle clockwise. Remove seal seat from compressor with a rotary pulling motion and discard seat.
6.
With seal protector J-33021 over end of shaft, set seal remover/installer J-33018 down onto shaft end, turning clockwise while pressing down to
engage remover tangs with tabs on seal assembly. Then lift shaft seal assembly out and discard seal.
7.
Using O-ring remover tool J-9553 or equivalent, remove and discard seal seat O-ring.
Installation
Fig. 5 Installing seal seat O-ring
1.
Dip new seal seat O-ring in 525 viscosity refrigerant oil and place on O-ring installer J-33011, Fig. 5.
2.
Insert O-ring installer into compressor neck. When installer bottoms, lower moveable slide of installer to release O-ring into seal seat lower O-ring
groove (top groove is for shaft seal retainer ring). Rotate installer to seat O-ring and remove installer.
3.
Dip O-ring and seal face of new seal assembly into 525 viscosity refrigerant oil. Position seal assembly on seal installer J-33018 by engaging tabs
of seal with tangs of installer.
4.
With seal protector J-33021 over end of compressor shaft, slide new seal assembly onto shaft. Twist installer clockwise while pushing seal
assembly down shaft until seal assembly engages flats on shaft. Disengage installer by pressing downward and twisting counterclockwise.
5.
Attach ceramic seal to seal seat remover/installer J-23128-A and coat seal face and outer surface with clean 525 viscosity refrigerant oil. Install
seat over compressor shaft and J-33021 seal protector. Push seat into place with turning motion, being careful not to dislodge seat O-ring. Ensure
seal seat makes good contact with O-ring and remove installer and seal protector.
6.
Install new seal seat retainer ring with flat side against seal seat. Press retainer ring into position using sleeve from remover/installer J-5403.
7.
Leak test compressor and clean any excess oil resulting from seal installation.
8.
Install clutch plate and hub assembly.
9.
Install compressor, belts, and bracket.
10.
Evacuate and charge A/C system.
