GMC 1976 ZEO 6083 Maintenance Manual page 110

Figure 91-Installing Second Piston
front AND ball and NUMBERED shoe disc on the
rear, over the axial plate. Hold front thrust bearing
pack tightly against axial plate hub while lifting hub.
Insert the Piston Assembly into the front cylinder
half (figure 90).
4. Repeat this operation for Pistons No . 2 and
No . 3 (figure 91).
5 . Without installing any 0-rings or bushings,
assemble one end of the new Service discharge cross-
over tube into the hole in the front cylinder half
(figures 92 and 93).
Be sure the flattened portion of this tube faces the
inside of the compressor to allow for axial plate
clearance (figure 93) .
6. Now rotate the shaft to position the pistons in
a stair-step arrangement; then carefullyplace the rear
Mr
O-Ring
Discharge
Bushing
Crossover Tube
Figure 92-Service Type Discharge Cross-Over Tube
AIR CONDITIONING SYSTEM 1- 93
Figure 93-Installing Discharge Cross-Over Tube
cylinder half over the shaft and start the pistons into
the cylinder bores (figure 94).
7. When all three Piston and Ring assemblies are
in their respective cylinders, align the end of the
discharge cross-over tube with the hole in the rear
half of the cylinder .
Figure 94-Pistons Postioned in Stair-Step
Arrangement