Chevrolet 1988 Light Duty Truck Repair Manual page 31

feeler gage is sliding out (figure 32). The
reading should be between 1.1 and 2.2 N (4
8
and ounces).
d. If the reading in step c above is under
ounces) or over 2.2 N
increase the thickness of the feeler gage
leaves and repeat steps a through c to obtain
a reading of 1.1 N to 2.2 N (4 to
Record the clearance between the ball and
axial plate that results in the 1.1 N to 2.2 N (4
8
to ounces) pull on the spring scale.
2. Rotate the shaft 120 degrees and repeat for the No.
2 cylinder.
• If the shaft is hard to rotate, install the shaft
nut onto the shaft and turn the shaft with a
wrench.
3. Rotate the shaft another 120 degrees and repeat for
cylinder No. 3.
4. Select a numbered shoe disc corresponding to the
m inim um feeler gage reading recorded in the three
checks:
POSITION POSITION
1
PISTON NO. 1 .0 1 9 "
PISTON NO. 2
.0 2 0 "
PISTON NO. 3
.0 2 1 "
A-6 AIR CONDITIONING COMPRESSOR 1B1-15
1.1
N (4
(8
ounces), reduce or
8
ounces).
POSITION SELECT
2 3 AND USE
SHOE NO.
.0 1 9 5 " .0 1 9 " 19
.0 2 0 " 20
.0 2 1 " .0 2 2 " 21
SHOE DISC
Identification
Part No.
Ending In Stamp
0
000
171 /2
175
18
180
I 8 V 2
185
19
190
191 /2
195
200 20
20
205
' h
21
210
21 V 2
215
22
220
THRUST BEARING RACE
Part No. Identification
Ending In Stamp
000 0
050 5
1/2
055 5
6
060
6 2
065 V
070 7
7 1 /2
075
8
080
8 2
085 V
090 9
1/2
095 9
100 10
101/2
105
110 11
115 1 1 1/2
120 12
Figure 33— Service Shoes and Thrust W ashers
• Place the shoe discs in J 9402 com partm ent
with the discs corresponding to piston No. 1
and the rear ball pocket position.
• S h o e d is c s are a v a ila b le
(0.0005-inch) v a ria tio n s. Eleven size s are
available for field servicing. Shoe discs are
marked with the shoe size which corresponds
to the last three digits of the part num ber
(figure 33).
• After selecting the shoe size, the matched
com bination of the shoe disc to the rear ball
spherical cavity in the piston must be kept in
the proper relationship during disassem bly
after perform ing the gaging operation and the
final assem bly of the internal m echanism.
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
(39) and adjust to zero (figure 34).
Min. Feeler
Gage Reading
.0000
.0175
.0180
.0185
.0190
.0195
.0200
.0205
.0210
.0215
.0220
Dial Indicator
Reading
.0000
.0050
.0055
.0060
.0065
.0070
.0075
.0080
.0085
.0090
.0095
.0100
.0105
.0110
.0115
.0120
F-01398
in 0.013 mm