GMC 1989 Light Duty Truck, Руководство по ремонту, Страница: 862 / 998

7B1-24 HM-290 MANUAL TRANSMISSION
I?
1.
2 .
3.
Inspect (Figure 34)
Shaft (53), for cracks, replace if these
conditions exist.
Gear teeth (53) for scuffed, nicked, burred,
broken teeth or high spots (a small shinny
spot on the gear teeth mating surface) that
could cause gear noise.
Bearings (203) for roughness of rotation,
burred or pitted condition, replace if these
conditions exist (Figure 1).
Bearing races (202) for scoring, wear or
overheating (Figure 1).
Important
If scuffed, nicked, burred or scoring
conditions cannot be removed with a soft
stone
or crocus cloth, replace the
component.
Fifth gear CANNOT be pressed off the
countershaft assembly (53), replace as an
assembly only.
D IS S A S S E M B LY A N D A S S E M B LY OF REVERSE
IDLER GEAR
❖
1.
2
.
3.
4.
5.
6
.
Disassemble (Figure 35)
Snap ring (47).
Thrust washer (48).
Ball (40).
Reverse gear (49).
Bearing assemblies (50) (THREE).
O-ring (52).
Clean
All parts in a suitable solvent and air dry.
1 ?
3.
Inspect
Gear teeth (49), for scuffed, nicked, burred,
broken teeth or high spots (a small shinny
spot on the gear teeth mating surface) that
could cause gear noise.
Bearing assemblies (50) for roughness of
rotation, burred or pitted condition and
gage damage, replace if these conditions
exist.
Shaft (51), for scoring, wear or overheating.
*
Important
If scuffed, nicked, burred or scoring
conditions cannot be removed with a
soft stone or crocus cloth, replace the
component.
Assemble (Figure 43)
• Lubricate all components as assembly
progresses. Use lubricant 5W-30 GM P /N
1052931 or equivalent.
1. Three bearing assemblies (50).
2. Reverse gear (49).
• Extended part of the hub faces thrust
washer.
3. Thrust washer (48) and ball (4mm) (40).
• Retain ball with petroleum jelly.
4. NEW snap ring (47)
5. NEW o-ring (52).
5 2
4 0 B A L L , 4 m m
4 6 ID LE R A S S E M B L Y , R E V E R S E
4 7 R IN G , S N A P
4 8 W A S H E R , T H R U S T
4 9 G E A R , R E V E R S E
5 0 B E A R I N G A S S E M B L Y , N E E D L E
51 S H A F T , R E V E R S E IDLER
5 2 O - R I N G
J H 0 0 2 8 - H M 2 9 0
Figure 3 5 Reverse Idler A s s e m b ly
D IS A S S E M B LY A N D A S S E M B LY OF FRONT
HOUSING A S S E M B LY
❖
Disassemble (Figure 36)
Tools Required:
J6125-1B Slide Hammer
Figure 3 4 C o u n te rs h a ft
5 3
5 3 C O U N T E R S H A F T A S S E M B L Y
K H 0 0 2 6 -H M 2 9 0