GMC 1990 Light Truck Repair Manual page 35

Position
Position
1
Piston No. 1 .019" .0195"
Piston No. 2 .020" .020"
Piston No. 3 .021" .021"
SHOE DISC
Identification
Part No.
Stamp
Ending In
0
000
171 /2
175
18
180
I V
185 8
19
190
195 191 /2
20
200
205 2 0 1 /2
21
210
V
215 21
22
220
THRUST BEARING RACE
Identification
Part No.
Ending In Stamp
000 0
5
050
055 51 /2
060
6
61 /2
065
7
070
075 71 /2
080 8
085 8 V
090 9
91 /2
095
100 10
105 IOV
110 11
111 /2
115
12
120
Figure 33—Service Shoes and Thrust Washers
• After selecting the shoe size, the matched
combination of the shoe disc to the rear ball
spherical cavity in the piston must be kept in
the proper relationship during disassembly
after performing the gaging operation and the
final assembly of the internal mechanism.
5. Repeat the gaging procedure for pistons Nos. 2
and 3.
6. Mount a dial indicator on the edge of J 9397 with
J 8001.
7. Position the dial indicator on the rear of the shaft
A-6 AIR CONDITIONING COMPRESSOR
Select
Position
and Use
2 3
Shoe No.
.019"
19
.020" 20
.022"
21
T2500
Min. Feeler
Gage Reading
.0000
.0175
.0180
.0185
2
.0190
.0195
.0200
.0205
.0210
.0215
2
.0220
Dial Indicator
Reading
.0000
.0050
.0055
.0060
.0065
.0070
.0075
.0080
2 .0085
.0090
.0095
.0100
2 .0105
.0110
.0115
.0120
F1398
Play
(39) and adjust to zero (figure 34).
• From the bottom, apply full hand force at the
end of the shaft a few times before reading the
clearance. This will squeeze the oil out from
between the mating parts. Now push upward
and record the measurement. Dial indicator
increments are 0.03 mm (0.001-inch); estimate
the reading to the nearest 0.013 (0.0005-inch).
• An alternate method is to use J 9661-01 in
selecting a suitable feeler gage leaf until the
result is a 1.1 N to 2.2 N (4 to 8 ounces) pull
1B1-15