Pontiac tempest 1968 - Rear Servo

7E-26
1968 PONTIAC SERVICE MANUAL
4. Support governor on 3/16" plates installed in
exhaust slots of sleeve, position new gear in sleeve
and, with suitable socket, press gear into sleeve
until nearly seated. Carefully remove any chips that
may have shaved off gear hub and press gear in until
it bottoms on shoulder.
5. A new pin hole must be drilled through sleeve
and gear. Locate hole position 90° from existing
hole, center punch and then while supporting gover-
nor in press, drill new hole through sleeve and gear
using a standard 1/8" drill.
6. Install retaining pin.
7. Wash governor assembly thoroughly to remove
any chips that may have collected.
ASSEMBLY OF GOVERNOR
1. Install governor valve in bore of governor
sleeve.
2. Install governor weights and springs and thrust
cap on governor sleeve.
3. Align pin holes in thrust cap, governor weight
assemblies and governor sleeve and install new
pins. Crimp both end of pins to prevent them from
falling out.
4
C
Check governor weight assemblies for free
operation on pins and governor valve for free move-
ment in governor sleeve.
INSPECTION OF FRONT SERVO
1. Inspect servo pin for damage.
ACCUMULATOR PISTON
2. Inspect servo piston for damaged oil ring
groove and check freedom of ring in groove.
3. Inspect piston for cracks or porosity.
4. Check fit of servo pin in piston.
REAR SERVO
DISASSEMBLY OF REAR SERVO
1. Remove rear accumulator piston from rear
servo piston (Fig. 7E-61).
2. Remove E-ring retaining rear servo piston to
band apply pin (Fig. 7E-62).
3. Remove rear servo piston and seal from band
apply pin (Fig. 7E-63).
4. Remove washer, spring and retainer.
INSPECTION OF REAR SERVO
1. Inspect freedom of accumulator rings in piston.
2. Inspect fit of band apply pin in servo piston.
3. Inspect band apply pin for scores or cracks.
4. Inspect accumulator and servo pistons for
cracks or porosity.
ASSEMBLY OF REAR SERVO
1. Install spring retainer, spring and washer on
band apply pin.
2. Install band apply pin, retainer, spring and
washer into bore of servo piston and secure with
E-ring.
E - RING SERVO PISTON
Fig. 7E-61 Removing Rear Accumulator Piston
from Rear Servo
Fig. 7E-62 Removing Retaining E-Ring from Rear Servo Pin