GMC T Series 1994 Repair Manual page 737

J 25025-1
219 RING, OIL SEAL (2)
220 BOLT, M8 X 1.25 X 40 (5)
Figure 73 Assem bling Pump Body and Pump Cover
THICKNESS (INCH)
.057 - .061
.073 - .077
.089 - .093
.1 0 5 - .109
.121 - .125
Figure 74 Output/Case Selective Thrust Washer (674)
FRONT SERVO ASSEMBLY
Figure 75
Clean
All components.
^1 Inspect
1. Front servo piston (58) for:
• Porosity or damage.
• Seal and seal ring groove for damage.
2. Piston pin (55) for:
• Wear.
3. Spring (60) for:
• Distortion.
4. Servo bore for:
• Wear or scoring.
-A-l Assemble
1. New seal (57) onto piston (58).
2. Front servo piston spring (60) and retainer (59).
3. Ring (56), piston pin (55) and piston (57).
219
REAR SERVO ACCUMULATOR
Figure 76
3
MH0074-4L80-E-R1
2
STRIPE
3.
BLUE
RED
BROW N
GREEN
PLAIN
5.
6
RH0113-4L80-E
•
I-&-I Assemble
4.
Disassemble
Retaining clip (64) from rear band apply pin
(73) and inspect.
Inspect
Rear Accumulator piston (68) and Rear Servo
1.
piston (65) for:
• Porosity or damage.
• Ring groove damage.
Seals (66, 67 and 69) for:
.
• Nicks or cuts.
Cover (62) for:
• Porosity.
• Scored or damaged.
Springs (71 and 74) for:
• Distortion.
• Damage.
Pin (73) for wear.
Servo bore for wear or scoring.
.
Clean
All components.
Rear servo spring retainer (72), rear servo spring
(71) and servo washer (70) on rear band apply
pin (73).
Reverse servo piston seal (66) on rear servo
piston (65) and press onto rear band apply pin
(73).
Retaining ring (64).
3.
Lube seals, inner (69) and outer (67) before
installing accu m u lator piston
accumulator piston (68). Place in rear servo
piston.
seals on