Front Servo (Neutral Only) - Buick LeSabre 1965 Service Manual

SUPER TURBINE "400'
DISASSEMBLY & ASSEMBLY 5 - 1 1 7
Figure 5-569
due to foreign material causing
i m p r o p e r operation. In such
cases, proceed as follows:
a. Disassembly
1. Cut off one end of each gover-
nor weight pin and remove pins,
governor thrust cap, governor
weights, and springs. Governor
weights are interchangeable from
side to side and need not be iden-
tified. See Figure 5-569.
2. Remove governor valve from
governor sleeve. Be careful not
to damage valve.
3. Perform the following inspec-
tions and replace governor driven
gear, if necessary.
CAUTION: EXTREME CARE
MUST BE EXERCISED NOT
TO DAMAGE THESE
MACHINED SURFACES
Figure 5-570
b. Inspection
1. Wash all parts in cleaning sol-
vent, air dry and blow out all
passages.
2. Inspect governor sleeve for
nicks, burrs, scoring or galling.
3. Check governor sleeve for free
operation in bore of transmission
case.
4. Inspect governor v a l v e for
nicks, burrs, scoring or galling.
5. Check governor valve for free
operation in bore of governor
sleeve.
6. Inspect governor driven gear
for nicks, burrs, or damage.
7. Check governor driven gear
for looseness on governor sleeve.
8. I n s p e c t governor weight
springs for distortion or damage.
9. Check governor w e i g h t s for
free operation in their retainers.
10. Check valve opening at entry
and exhaust (.020 inch minimum.)
c. Governor Driven
Gear Replacement
To facilitate governor repair in
the field, a governor driven gear
and replacement pins are avail-
able for service use. The service
package contains a nylon driven
gear, two governor weight re-
taining pins ana one governor
gear retainer split pin. Replace-
ment of gear must be performed
with care in the following manner:
1. Drive out governor gear re-
taining split pin using small
punch. See Figure 5-570.
2. Support governor on 3/16 inch
plates installed in exhaust slots
of governor sleeve, place in arbor
press, and with a long punch,
press gear out of sleeve.
3. Carefully clean g o v e r n o r
sleeve of chips that remain from
original gear installation.
4. Support governor on 3/16 inch
plates, install in exhaust slots of
sleeve, position new gear in
sleeve and, with a suitable socket,
press gear into sleeve until nearly
seated. Carefully r e m o v e 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 governor in p r e s s ,
drill new hole through sleeve and
gear using a standard (1/8 inch)
drill.
6. Install retaining pin.
7. Wash g o v e r n o r assembly
thoroughly to remove any chips
that may have collected.
d. Assembly
1. Install governor valve in bore
of governor sleeve.
2. Install governor weights and
springs, and thrust cap on gover-
nor sleeve.
3. Align pin holes in thrust cap,
governor weight assemblies and
governor sleeve, and install new
pins. Crimp both ends of pin to
prevent them from falling out.
4. Check governor weight assem-
blies for free operation on pins.
5-16 FRONT SERVO
INSPECTION
a. Inspection
1. Inspect servo pin for damaged
snap ring groove. See Figure
5-571.
2. Inspect piston for damaged oil
ring groove, check freedom of
ring in groove.