GMC 1989 Light Duty Truck Repair Manual page 33

fe e le r g a g e is sliding out (figure 32). T h e
reading should be betw een 1.1 and 2 .2 N (4
8
and ounces).
d. If the reading in step c above is under 1.1 N (4
ounces) or over 2 .2 N
in c re ase the th ic kn es s of the fe e le r g ag e
leaves and repeat steps a through c to obtain
a reading of 1.1 N to 2 .2 N (4 to
Record the cle ara n c e betw een 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. R otate the shaft 120 d eg ree s 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
w rench.
3. Rotate the shaft an o ther 120 d eg ree s and repeat for
cylinder No. 3.
4. S elect a n um bered shoe disc corresponding to the
m inim um feeler g ag e reading recorded in the three
checks:
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
(8
ounces), reduce or
8
ounces).
POSITION POSITION SELECT
2 3 AND USE
SHOE NO.
.0195" .0 1 9 " 19
.0 20 " .0 2 0 " 20
.02 1 " .02 2 " 21
SHOE DISC
Identification
Part No.
Ending In Stamp
0
000
171/2
175
18
180
8
I V
185
19
190
191 /2
195
200 20
201 /2
205
210 21
21
V
215
22
220
THRUST BEARING RACE
Part No. Identification
Ending In Stamp
000 0
050 5
51 /2
055
6
060
6 V 2
065
7
070
1 /2
075 7
8
080
8 V 2
085
090 9
91 /2
095
100 10
IOV
105
1 1
110
111 /2
115
120 12
Figure 33—Service Shoes and Thrust Washers
• Place the shoe discs in J 9 4 0 2 co m p artm en t
with the discs corresponding to piston No. 1
and the rear ball pocket position.
• S h o e d is c s a r e
(0 .0 0 0 5 -in c h ) v a ria tio n s .
availab le for field servicing. S h o e discs are
m arked with the shoe size which corresponds
to the last th ree digits of the part n um ber
(figure 33).
• After selecting the shoe size, the m atched
com bination of the shoe disc to the rear ball
spherical cavity in the piston m ust be kept in
th e p ro per relationship d uring d is a s s e m b ly
after perform ing the gaging operation and the
final assem b ly of the internal m ech an ism .
5. R e p e a t the gaging procedure for pistons Nos. 2 and
3.
6
. M ount a dial indicator on the ed g e of J 9 3 9 7 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
2
.0185
.0190
.0195
.0200
.0205
.0210
2
.0215
.0220
Dial Indicator
Reading
.0000
.0050
.0055
.0060
.0065
.0070
.0075
.0080
.0085
.0090
.0095
.0100
2
.0105
.0110
.0115
.0120
F-01398
a v a i l a b le in 0 .0 1 3 m m
E le v e n s iz e s a re