Hold spring seat (85) with pilot valve wrench and
remove nut (84).
Remove spring seat (85) while holding pilot valve
plunger (121) stationary.
Remove thrust bearing (86).
Remove retaining ring (87) from bushing (120)
and lift flyweight assembly (87 through 91) out of
Disassembly right (89) and ball arm (90) from ball
Remove needle valve and packing (92 and 93).
Remove screw and packing (94 and 95).
Remove ring (96) and pull out buffer cap (97) with
smooth jaw pliers. Remove packing (98).
Remove retaining ring (99) and buffer system
(100 through 103). Thread a base bolt into plug
(100) to ease removal.
Turn actuator over on its top with base up and
remove drive coupling (104).
Remove screws and lockwashers (105 and 106).
Place two screwdrivers into the slots provided on
each side of the base. Carefully work base off by
twisting and prying to free taper pins and remove
base. When separating the base from case be
careful of parts falling out and becoming
Remove oil seal ring (118), packing (119), plug
(111), and packing (112).
Remove relief valve parts (113 through 116).
(32) Remove rotating bushing (120), pilot valve plunger
(121), compensation bushing (122) and retaining
ring (123) from case.
Remove idler gear (124).
Remove bushing (126, pilot valve plunger (127)
and retaining ring (128).
Disengage magnet spring (129) from pilot valve
plunger (127) and remove compensating bushing
Remove cotter pin (27), pin (131) and push power
piston (133) out of case from top.
Remove pushrod pin (134).
Remove nut (135) and pivot washer (136), and
push linkage return piston (137) out of case from
top. Count number of turns when removing the
nut for reassembly.
Lift free end of floating lever (142) and turn it to a
position where pin (138) can be driven out.
Remove floating lever (142), terminal lever (146),
terminal lever link (147) and pivot link (148).
Remove snap ring (149).
Remove power piston (152) through top of case.
Pull sleeve (153) out of case using a hook-shaped
b.Ball Head Repair. Use an arbor press
and tool T93163 to disassemble the ball
head. See figure 12-6. Press the drive cup
and ball head out of the cover.
Disassemble the drive cup, ball head,
bearing and flyweights. Note which side of
the bearing is "up" in the drive cup and
reassemble it with the same side up.
12-6. OVERHAUL. Check all parts for wear, cracks,
nicks, corrosion, or other damage. Check threads and
serrations for tooth damage. Check the electrical
connector for cracks or damage and wiring connections
for breaks. Check all bearings for wear and damage.
Replace flyweights if worn areas on the toes are greater
than 3/64 inch wide.