Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1899

7A4-28 UNIT REPAIR (JR405E)

OIL PUMP ASSEMBLY

01PUMP32

Legend

1. Oil seal

2. O-ring (small)

3. Oil pump housing

4.

Inner

rotor

5. Outer rotor

6. Oil pump cover

7. O-ring (large)

8. Seal ring (large)

9. Seal ring (small)

10.

Bearing

race

02PUMP07

Disassembly steps

1. Oil pump cover

2. Oil pump housing

•

Loosen the 8 bolts evenly a little at a time.

UNIT REPAIR (JR405E) 7A4-29

04PUMP10

•

Separate the oil pump cover from the oil pump housing

by tapping on each of the bolts with a plastic hammer.

06PUMP13

3. Inner rotor

Remove the inner rotor from the oil pump housing.

07PUMP14

4. Outer rotor

Remove the outer rotor form the oil pump housing.

15PUMP18

5. O-ring (small)

Remove the O-ring (small) from the oil pump housing.

10PUMP19

6. Oil seal

Remove the oil seal from the oil pump housing.

7A4-30 UNIT REPAIR (JR405E)

08PUMP09

7. O-ring (large)

Remove the O-ring (large) from the oil pump cover.

09PUMP05

8. Seal ring

Remove the 4 seal rings from the oil pump cover.

11PUMP43

Inspection

Oil pump cover

•

Install new seal rings to the oil pump cover.

NOTE:
The seal ring with the large inside diameter fits into the
primary mating surface of the cover.

•

Measure the gap between the seal ring and the seal ring

groove.

If the measured gap is outside the specified range, the

oil pump cover must be replaced.

Seal ring and seal ring groove gap: 0.10

∼∼∼∼

0.25 mm

(0.0039

∼∼∼∼

0.0098 in)

12PUMP45

Inner rotor

•

Install the inner rotor to the oil pump housing.

•

Use a straight edge to measure the side clearance

between the oil pump housing and the inner rotor.

If the measured clearance is outside the specified

range, the inner rotor must be replaced.

Oil pump housing and inner rotor side clearance:

0.02~0.04 mm (0.0008~0.0016 in)

UNIT REPAIR (JR405E) 7A4-31

13PUMP46

Outer rotor

•

Install the outer rotor to the oil pump housing.

•

Measure the gap between the outer rotor and the

crescent.

If the measured gap is outside the specified range, the

outer rotor must be replaced.

Outer rotor and crescent gap:

0.02~0.15 mm (0.0008~0.0059 in)

14PUMP28

Reassembly steps

Coat the parts with ATF before installing them.
1. Oil seal

•

Use the oil seal installer to install new oil seal to the oil

pump housing.

Oil seal installer: 5-8840-2761-0

15PUMP18

2. O-ring (small)

Install new O-ring (small) to the oil pump housing.

16PUMP29

3. Outer rotor

4. Inner rotor

Install the outer rotor and the inner rotor to the oil pump

housing.

17PUMP42

NOTE:
The identification mark on the inner rotor must be facing
the inside of the oil pump housing.