Isuzu N-Series. Manual — part 857
MANUAL TRANSMISSION 7B-89
Counter Shaft (6MT)
Components
Disassembly
1. Remove the bearing fixing snap ring using snap
ring pliers.
2. Remove the bearing; counter front using the bear-
ing remover 5-8840-2587-0.
3. Remove the anti-lash plate fixing snap ring using
snap ring pliers.
4. Remove the anti-lash plate using the flange holder
5-8840-4056-0.
5. Remove the three coil springs from the 5th gear.
6. Remove the straight pin from the 5th gear.
7. Remove the collar and thrust washer with a press
using a bearing remover.
Legend
1. Snap ring
6. Straight pin
2. Bearing; Counter front
7. Counter shaft assembly
3. Snap ring
8. Bearing; Counter rear
4. Anti-lash plate
9. Thrust washer
5. Coil spring
10. Collar
1
2
3
7
8
9
10
4
6
5
N7A0403E
N7A1253E
N7A0397E
7B-90 MANUAL TRANSMISSION
8. Remove the bearing; counter rear using the bear-
ing remover 5-8840-2587-0.
If any wear, damage or other abnormality is found
on the disassembled parts, repair or replace the
parts.
9. Inspect the surface of each gear for damage or
wear. If any abnormality is found, replace the gear.
10. Inspect each bearing with respect to the following
items. If any abnormality is found, replace with a
new one.
• Smoothness of rotation
• Noise
• Abnormal external appearance, including dam-
age, rust, etc.
• Abnormal free play in thrust direction
Assembly
1. Insert the bearing; counter rear with a press using
the installer 5-8840-2244-0.
2. Insert the collar and thrust washer with a press us-
ing the installer 5-8840-2244-0.
3. Install the straight pin within the range of protru-
sion.
N7A1259E
N7A1254E
N7A1255E
N7A1262E
MANUAL TRANSMISSION 7B-91
4. Assemble the three coil springs to the groove on
the side of the 5th gear, while these springs have
to touch the left side of the pin viewing from the
center of the gear.
5. Set the springs between the folded protrusion of
the anti-lash plate and the straight pin. Using the
flange holder 5-8840-4056-0, align the set hole of
the anti-lash plate with the set hole of the 5th gear,
and install.
6. Install the anti-lash plate fixing snap ring using
snap ring pliers.
Caution:
Replace deformed or damaged snap rings with new
ones. Check that the parts are securely installed.
7. Install the bearing: counter front with a press using
the installer 5-8840-2244-0.
8. Install the bearing fixing snap ring using snap ring
pliers.
• Select the thickest snap ring installable from
the following three types.
N7A0400E
N7A0401E
Thickness, mm (in)
Color
1.9 (0.0748)
Blue
2.1 (0.0826)
Yellow
2.3 (0.0905)
Pink
N7A0397E
N7A1256E
7B-92 MANUAL TRANSMISSION
Caution:
Replace deformed or damaged snap rings with new
ones. Check that the parts are securely installed.
Special Tools
Illustration
Tool Number /
Description / Remarks
5-8840-2587-0 / Bearing
Remover
5-8840-4056-0 / Flange
Holder
5-8840-2244-0 / Bearing
Installer
5884025870
5884040560
5884022440
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