Chevrolet 1977 10 Series, Repair Manual, Page: 338 / 468

(400)7A-18 OVERHAUL MANUAL
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 degrees from existing hole,
center punch and then, while supporting governor in press,
drill new hole through sleeve and gear using a standard (1/8
inch) drill.
6. Install split retaining pin.
7. Wash governor assembly thoroughly to remove any
chips that may have collected.
Assembly
1. Install governor valve in bore of governor sleeve, large
end first.
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 ends of pins to prevent them from falling out.
4. Check governor weight assemblies for free operation
on pins.
5. Check governor valve for free movement in governor
sleeve.
Front Servo Parts Inspection
NOTE:
See Fig. 7A-61C. Do not remove the teflon oil
seal ring from the front servo piston unless the oil seal
ring requires replacement. For service, the oil seal ring
is aluminum.
1. Inspect servo pin for damage.
2. Inspect piston and oil ring for damage.
3. Check fit of servo pin in piston and case bore.
Fig. 7A-62C--Removing Rear Acc umulator Piston from Rear
Servo Piston
Fig. 7 A - 6 3 C - R e m o v i n g Re ta in in g "E" Ring f r o m Rear Servo Pin
Rear Servo Assembly
Disassembly
1. Remove rear accum ulator piston from rear servo
piston (Fig. 7A-62C-A).
2. Remove "E" ring retaining rear servo piston to servo
pin (Fig. 7A-63C).
3. Remove rear servo piston and seal from servo pin (Fig.
7A-64C). (Exploded view.)
4. Remove washer, spring, and spring retainer.
Inspection
NOTE:
See Fig. 7A-64C. Do not remove the teflon oil
seal rings from the rear accum ulator piston, unless the
oil seal rings require replacement. If the teflon inner oil
seal ring (small diameter) requires replacement, for
service, use the alum inum oil seal ring.
The rear accum ulator piston, large diam eter ring
groove depth, is machined shallower to take the large
teflon oil seal ring. If this ring requires replacement use
only the teflon oil seal ring.
1. Inspect freedom of accum ulator rings in piston
grooves.
2. Inspect fit of servo pin in servo piston in case bore.
3. Inspect servo pin for scores or cracks.
4. Inspect accum ulator and servo pistons for scoring,
cracks or porosity.
Assembly
1. Install spring retainer cup side down, spring and
washer on servo pin.
2. Install servo pin, retainer, spring and washer, into
bore of servo piston and secure with "E" ring.
3. Install oil seal ring on servo piston, if removed.
4. Install outer and inner oil rings on accum ulator
piston, if removed, and assemble into bore of servo piston.
SERVO PISTON
ACCUMULATOR PISTON