Buick LeSabre 1965 Service Manual page 832

ACCESSORIES OPTIONAL HEATER-AIR CONDITIONER SYSTEM 1 1 - 9 9
Figure 11-135-Checking Selected
Feeler Gauge with Spring Scale
selected for a satisfactory "feel"
between the rear ball and swash
plate as instructed in Step (a),
attach a spring scale to end of
feeler leaf. Spring scale must be
calibrated in ounces, such as Gen-
erator brush tension scale J-5164
or spring scale used for checking
distributor point spring tension.
Insert the selected feeler leaf
between rear ball and swash plate,
then pull straight out on spring
scale with a steady, even pull be-
ing sure feeler does not bend or
kink. See Figure 11-135. Record
reading on scale. Spring scale
must be read while feeler is mov-
ing. If selected feeler is correct
size, spring scale will read be-
tween 4 and 8 ounces (the higher
reading is desired). If reading is
not within limits, select the next
.0005" smaller or larger feeler
leaf and repeat spring scale check
until proper reading is obtained.
Then proceed with Steps (c), (d),
(e), (f), and (g) checking selected
feeler leaf drag with spring scale
at each location. The cylinder
parts and feeler leaves must be
very clean and coated with 525
viscosity compressor oil.
NOTE: By using the spring scale
to check the selected feeler leafs,*
a standard may be set up as to the
amount of feeler leaf drag re-
quired to properly rebuild the
compressor. Also, the size of the
numbered shoe discs and thrust
bearing races for service has"
been determined by using the
spring scale method of checking
feeler leaf drag.
(c) Rotate the shaft approximately
120° and make a second check
with feeler gauge between same
ball and plate.
(d) Rotate shaft again approxi-
mately 120° and repeat check with
feeler gauge between these same
parts.
(e) From this total of three
checks between the same ball and
swash plate at 120° increments on
swash plate, use the minimum
feeler gauge reading to select a
numbered shoe to correspond to
this reading. See Example below.
Example:
Posi- Posi- Posi-
tion tion tion
1 2 3
Piston #1 .019 .020 .019
Select and use a No. 19 Shoe
Piston #2 .020 .020 .020
Select and use a No. 20 Shoe
Piston #3 .021 .020 .021
Select and use a No. 20 Shoe
SHOE DISC CHART
Service
Part Number
6557000
6556175
6556180
6556185
6556190
6556195
6556200
6556205
6556210
6556215
6556220
Identification No.
Stamped on
Shoe Disc
0
17-1/2
18
18-1/2
19
19-1/2
20
20-1/2
21
21-1/2
22
(f) Mark piston number " 1 , " "2"
or "3" on selected shoe package
and place in corresponding posi-
tion in parts tray.
(g) Repeat the above procedure on
the other two pistons.
14. The next gauging operation is
to determine space between REAR
thrust bearing and rear outer
thrust race.
Figure 11-136—Gauging Clearance
Between Rear Needle Thrust
Bearing Rear Outer Race
(a) Use a suitable combination of
feeler gauge leaves to get a satis-
factory "feel" between these two
parts. See Figure 11-136.
(b) The spring scale method
should also be used to check the
drag of the feeler leaf that has
been selected for clearance be-
tween rear thrust bearing and
rear outer race. See Figure
11-137. The reading on the spring
scale when pulling feeler leaf be-
tween these parts also should be
between 4 and 8 ounces (the high-
er reading is desired). If reading
is not within limits, select the
next smaller or larger feeler leaf
and repeat spring scale drag
check until proper reading is
obtained.
(c) Select from stock a numbered
thrust race that corresponds to
FEELER G A U G E
(BETWEEN REAR
THRUST BRG. A N D
REAR OUTER RACE)
Figure 11-137-Checking Selected
Feeler Gauge with Spring Scale