transfer case ISUZU KB P190 2007 Workshop Workshop Manual

TRANSFER CASE 7D-19
• Breather hose (Between the transfer case and the
transfer actuator assembly)
• Transfer actuator assembly
• Switch bracket
• 2-4 switch assembly (Gray harness cover)
• Neutral switch assembly (Black harness cover)
• Detent plugs, detent springs, and detent balls (2
parts each)
4. Use a flange holder (5-8840-0133-0) to remove the
end nut from the front companion flange.



RTW 77DSH000201

5. Remove the bolts attaching the rear cover to the
transfer case.

6. Strike the area around the front output shaft head and
the rear cover bolt holes with a plastic hammer to
remove the rear cover.

220R300022


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ISUZU KB P190 2007

7D-20 TRANSFER CASE
7. Remove the parts listed below from the rear cover.
• H-L sleeve
• H-L shift assembly
• 2-4 sleeve, synchronizer key, and front
synchronizer spring (do not remove the rear
spring)
• 2-4 shift assembly
• Shift drum and shift shaft
• Sun gear needle bearing

260R300001












8. Remove the oil pump strainer fixing bolts from the
rear cover.
9. Compress the retaining ring at the rear of the chain.
Strike the rear end of the main shaft with a plastic
hammer to remove the main shaft, transfer chain, and
front output shaft assembly from the rear cover. Be
careful not to damage the oil pump strainer.

226R30001

Legend

(1) Sun Gear Needle Bearing
(2) H-L Sleeve
(3) 2-4sleeve, synchronizer key, and front synchronizer spring
(4) 2-4 Shift ASM
(5) Shift Shaft
(6) H-L Shift ASM
(7) Shift Drum

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ISUZU KB P190 2007

TRANSFER CASE 7D-21
10. Remove the transfer chain and the front output shaft
from the main shaft.
11. Remove the main shaft snap ring.
12. Remove the speedometer drive gear, the ball
bearings, the retaining ring, and the oil pump
assembly.
13. Remove the sprocket snap ring.
14. Remove the thrust washer, the drive sprocket, the
inside ring, the outside ring, the block ring, and the
rear synchronizer spring.


RTW 37DMF000101
Legend
(8) Thrust W asher
(1) Rear synchronizer spring
(9) Sprocket Snap Ring
(2) Block Ring
(10) Oil Pump ASM
(3) Outside Ring
(11) Oil Pump Retaining Ring
(4) Inside Ring
(12) Retaining Ring
(5) Drive Sprocket
(13) Ball Bearing
(6) Transfer Chain (14) Speedometer Drive Gear
(7) Front Output shaft (15) Main Shaft Snap Ring


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ISUZU KB P190 2007

7D-22 TRANSFER CASE
15. Remove the snap ring from the main shaft.
16. Use a press to remove the 2-4 hub from the main
shaft.





17. Spread the edges of the retaining ring (1) while lightl
y
tapping on the sun gear input shaft end. Remove the
carrier and gear assembly from the transfer case.

226R300020

18. Remove the dog teeth snap ring from the carrier and
gear assembly.
19. Remove the planetary dog teeth and the sun gear
input shaft together with the thrust needle bearing.

2260R300021










20. Remove the carrier snap ring.
21. Use a press to remove the ball bearings.





22. Use a sliding hammer (5-8840-0084-0) and a needle
bearing replacer (5-8840-0027-0) to remove the
needle bearing from the center of the carrier and gea
r
assembly.
Legend

(1) Outer Retaining Ring
(2) Carrier and Gear ASM
(3) Thrust needle Bearing
(4) Sungear Input Shaft
(5) Planetary DogTeeth
(6) Dog Teeth Snap Ring

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ISUZU KB P190 2007

TRANSFER CASE 7D-23


23. Remove the retaining ring (spiral type) together with
the internal gear and the damper ring.

226R300004






24. Remove the snap ring.
25. Use a press to remove the front output shaft ball
bearings.
26. Remove the oil pump wire snap ring from the rear
cover.

27. Use a sliding hammer (5-8840-0084-0) and a needle
bearing replacer (5-8840-2788-0) to remove the
needle bearing from the front output shaft.


P1010023
Legend
(1) Dumper Ring
(2) Internal Gear
(3) Retaining Ring

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ISUZU KB P190 2007

7D-24 TRANSFER CASE
Internal Component Disassembly and Reassembly

226R300017















H-L Shift Disassembly
1. Remove the guide roller.
2. Use a vise to compress the H-L shift spring (inside the
assembly)





3. Remove the outer snap ring.
4. Remove the shift block assembly from the shift rod.





5. Use a socket and a vise to compress the shift block
spring (inside the assembly)
6. Remove the inner retaining ring.
7. Remove the collar (rear)
8. Remove the shift block spring.
9. Remove the collar (front)
10. Remove the shift block assembly
11. Remove the spring pin.
12. Remove the shift arm.

Legend

(1) Shift Arm
(2) Shift Block Assembly
(3) Inner Retaining Ring
(4) Collar (Front)
(5) Shift Block Spring
(6) Collar (Rear)
(7) Shift Rod
(8) Outer Snap Ring
(9) Guide Roller
(10) Spring Pin

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ISUZU KB P190 2007

TRANSFER CASE 7D-25
H-L shift reassembly
1. Install the shift arm to the shift rod.
2. Install the spring pin. The top of the pin must be flush
with the surrounding surface (no projection).
3. Install the front collar, the spring, and the rear collar to
the shift block in that order.
4. Use a socket and a vise to compress the shift block
spring.
5. Install the inner retaining ring. Be sure that the arm
aperture width is within the specified limit.

226R300014






6. Install the shift lock assembly to the shift rod.
7. Use a socket and a vise to compress the H-L shift
spring.
8. Install the outer snap ring.
9. Install the guide roller.

2-4 shift ASM

226R300016











2-4 shift disassembly
1. Remove the guide roller.
2. Compress the spring and remove the snap ring.
3. Remove the shift arm.
4. Remove the spring.
5. Remove the spring pin.
6. Remove the shift block assembly.
7. Remove the shift rod.

Legend

(1) 25.62 °
(2) 14.1mm Legend
(1) Shift Rod
(2) Shift Arm
(3) Spring
(4) Shift Block Assembly
(5) Spring Pin
(6) Guide Roller
(7) Snap Ring

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ISUZU KB P190 2007

7D-26 TRANSFER CASE
2-4 shift reassembly
1. Install the shift block assembly to the shift rod.
2. Install the spring pin. The head of the pin must not
project beyond the surface (1) of the shift block.

226R300015
3. Install the spring.
4. Install the shift arm.
5. Compress the spring and install the snap ring.
6. Install the guide roller.

Oil pump disassembly
1. Remove the clamps securing the screen.
2. Remove the screen.
3. Remove the clamps securing the hose.
4. Remove the hose.
NOTE: To maintain and protect oil pump function, the
pump is constructed so that it cannot be disassembled.
Under no conditions attempt to disassemble the pump.
Oil pump reassembly

1. Tighten the clamps to secure the hose.
2. Tighten the clamps to secure the screen.
NOTE: Be careful in the direction of clamps.

RTW 37DSH000101
Legend
(1) Oil Pump Assembly
(2) Clamp
(3) Hose
(4) Screen Assembly



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ISUZU KB P190 2007

TRANSFER CASE 7D-27
Inspection and Repair
1. Make the necessary repair or parts replacement if
wear, damage or any other abnormal conditions are
found during inspection.
2. W ash all parts thoroughly in clean solvent. Be sure all
old lubricant, metallic particles, dirt, or foreign material
are removed from the surfaces of every part. Appl
y
compressed air to each oil feed port and channel in
each case half to remove any obstructions or cleaning
solvent residue.

Inspection and Repair (Transfer Case
Assembly)
W hen wear, damage, or any other defects are observed
during the inspection, the part or parts must be repaired
or replaced. W ash all the parts with clean detergent, and
check that old oil, metallic particles, dirt, or foreign
materials are completely removed. Blow the air into oil
holes and grooves to remove foreign materials or
residual detergent.

Chain
• Check whether the face that contacts the sprocket is
free from excessive wear or damage. If defects are
observed, replace the part.
• If the chain interference mark is found on the inside
wall of the transfer cover or the chain is so slack that a
skipped engagement occurs between the chain and
sprocket, replace the chain.

Sprocket
• Check whether the sprocket tooth surface is
excessively worn or damaged, and there is evidence
of burrs, chipping, wear, or damage on the gear
spline. Remove minor flaws or scratches with oil
stone. If excessive wear or damage is observed,
replace the part.
• If excessive wear or damage is observed on the
sprocket inside sliding surface, replace the part.

Gear
• Check whether the gear tooth surface is excessively
worn or damaged, and there is evidence of burrs,
chipping, wear, or damage on the gear spline.
• Remove minor flaws or scratches with oil stone. I
f
excessive wear or damage is observed, replace the
part.

2-4 and Neutral Switch

• Check the continuity of 2-4 and Neutral switch.
If defects are observed, replace the 4H and 4L switch.




221R300001
261R300003
Switch
Stroke 2-4 Switch
Signal Neutral Switch

Signal
Terminal
1 to 2 Terminal
1 to2
1 Open Close
2 Close Open



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ISUZU KB P190 2007

7D-28 TRANSFER CASE
Oil Pump
• Remove foreign materials from the strainer. If the
strainer is damaged, replace it.
If the area into which the shaft is inserted is excessively
worn or damaged, replace the oil pump assembly.

Clutch Hub Spline Play
• Set a dial indicator to the clutch hub to be measured.
• Move the clutch hub as far as possible to both the
right and the left.
Note the dial indicator reading.
• If the measured value exceeds the specified limit, the
clutch hub must be replaced.
Clutch hub spline play
Standard: 0-0.1 mm (0-0.004 in)
Limit: 0.2 mm (0.008 in)

226RS042
Bearings
1. Inspect the condition of all the needles and ball
bearings. W ash bearings thoroughly in a cleaning
solvent. Apply compressed air to the bearings.
NOTE: Do not allow the bearings to spin. Turn them
slowly by hand. Spinning bearings may damage the
rollers.
2. Lubricate the bearings with a light oil and check them
for roughness by slowly turning the race by hand.

Ball Bearing Play

1. Use a dial indicator to measure the ball bearing play.
2. If the measured value exceeds the specified limit, the
ball bearing must be replaced.
Limit: 0.2 mm (0.008 in)

226R3043

Synchronizers
The synchronizer hubs and sliding sleeves are a selected
assembly and should be kept together as originally
assembled.
Clean synchronizer components with clean solvent and
air dry.
Inspect the components for the following:
• Teeth for wear, scuffs, nicks, burrs or breaks.
• Keys and springs for wear, cracks or distortion,
replace if these conditions are present.
• If scuffed, nicked or burred conditions cannot be
corrected with a soft stone or crocus cloth, replace the
component.


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ISUZU KB P190 2007