Isuzu KB P190. Manual — part 1170
7B1-74 MANUAL TRANSMISSION
8. Apply molybdenum disulfide type grease to the
areas shown in the figure and install the shift fork.
F07L100026
9. Pack the inside recess (A) and coat the back (B) of
the release bearing with molybdenum disulfide type
grease, as shown in the figure.
A07RW075
10. Install the release bearing on the front cover, joining
it to the shift fork.
MANUAL TRANSMISSION 7B1-75
Intermediate Plate with Gear Assembly, Detent, Shift Arm, Shift Rod, and
Interlock Pin
Disassembled View
RTW57BLF000201
Legend
(1) Detent Spring Plate and Gasket
(7) 1st-2nd Shift Rod
(2) Detent Spring
(8) 3rd-4th Shift Rod
(3) Detent Ball
(9) 3rd-4th Shift Arm
(4) Spring
(10) 1st-2nd Shift Arm
(5) Rev-5th Shift Rod
(11) Interlock Pin
(6) Rev-5th Shift Arm and Reverse Inhibitor
(12) Intermediate Plate and Gear Assembly
7B1-76 MANUAL TRANSMISSION
Disassembly
1. Remove the detent spring plate and gasket, detent
spring and detent ball.
Use a magnetic hand to remove the detent balls
from the intermediate plate.
220RS011
2. Remove the spring.
3. Remove the rev-5th shift rod, and rev-5th shift arm
and the reverse inhibitor.
Remove the 1st-2nd shift rod, 3rd-4th shift rod, 3rd-
4th shift arm, and 1st-2nd shift arm.
• Hold a round bar against the shift rod end.
230RS003
• Use a spring pin remover to remove the shift
arm spring pins from the shift arms and the shift
rods.
230RS0004
• Be careful not to lose the interlock pins, when
pulling out the shift rod rearward.
The interlock pins are located between the
shifter rods in the intermediate plate.
230RS0005
• Remove the rev-5th, 1st-2nd and 3rd-4th shift
rods carefully.
4. Remove the interlock pin from intermediate plate
and gear assembly.
MANUAL TRANSMISSION 7B1-77
Inspection and Repair
Make the necessary adjustments and part replacements
if excessive wear or damage is discovered during
inspection.
Shift Arm Thickness
• Use a micrometer to measure the shift arm
thickness.
If the measured value is less than the specified limit,
the shift arm must be replaced.
Shift Arm Thickness
Standard Limit
1st-2nd
9.60 - 9.85 mm
(0.378 - 0.388 in)
3rd-4th
Rev.5th
9.60 - 9.80 mm
(0.378 - 0.386 in)
9.0 mm
(0.354 in)
230RS006
Detent Spring Free Length
• Use a vernier caliper to measure the detent spring
free length.
If the measured value is less than the specified limit,
the detent spring must be replaced.
Detent Spring Free Length
Standard Limit
26.8 mm (1.06 in)
26.2 mm (1.03 in)
SOUTH AFRICA 5th-Rev Only
Detent Spring Free Length
Standard Limit
Outer
27.6 mm (1.09 in)
27.0 mm (1.06 in)
Inner
26.6 mm (1.05 in)
26.0 mm (1.02 in)
220RS012
Detent Spring Tension
• Use a spring tester to measure the detent spring
tension.
If the measured value is less than the specified limit,
the detent spring must be replaced.
Detent Spring Tension
Compressed height
Standard
20 mm (0.787 in)
87.2 - 97.1 N
(19.6 - 21.8 lb)
220RS013
SOUTH AFRICA 5th-RV Only
Detent Spring Free Length
Compressed Standard
Outer
20 mm (0.787 in)
93.5 – 103.3 N
(21.0 – 23.3 lb)
Inner
20 mm (0.787 in)
26.4 – 36.3 N
(5.9 – 8.2 lb)
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