engine ISUZU TF SERIES 2004 Workshop Manual

ENGINE MECHANICAL 6A – 127

OIL PUMP AND OIL FILTER




RTW46ALF001501

The 4J series engine is equipped with a gear type oil pump.
The oil filter and the water cooled oil cooler integrated a single unit to increase the cooling effect.

6A – 128 ENGINE MECHANICAL
OIL PUMP
DISASSEMBLY



















Disassembly Steps
1.
Oil pipe 5.
Driven gear
2.
Strainer 6. Relief valve assembly
3. Pump cover 7. Pinion gear
4. Driven gear with bushing 8. Oil pump body
Disassembly procedure is shown in the illustration above numerical order.
051R100005

ENGINE MECHANICAL 6A – 129

INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during
inspection.
Gear Teeth and Body Inner Wall Clearance
Use a feeler gauge to measure the clearance between the
gear teeth and the body inner wall.
If the clearance between the gear teeth and the body inner
wall exceeds the specified limit, either the gear or the body
must be replaced.
Gear Teeth and Body Inner Wall Clearance mm (in)
Standard Limit
051RY00001 0.14 (0.0055) 0.20 (0.0079)

Gear and Body Clearance
Use a feeler gauge to measure the clearance between the
body and the gear.
If the clearance between the gear and the body exceeds
the specified limit, the body must be replaced.
Gear and Body Clearance mm (in)
Standard Limit




RTW46ASH002701
0.06 (0.024) 0.15 (0.0059)

Drive Shaft and Oil Pump Body Clearance
Use a micrometer to measure the drive shaft outside
diameter.
Use an inside dial indicator to measure the pump body
inside diameter.
If the clearance between the drive shaft and the oil pump
body exceeds the specified limit, the oil pump assembly
must be replaced.
Drive Shaft and Oil Pump Body Clearance mm (in)
Standard Limit
0.04 (0.0016) 0.20 (0.0079)
051RY00003

6A – 130 ENGINE MECHANICAL

REASSEMBLY

























Reassembly Steps
1.
Oil pump body 5.
Pinion gear
2.
Drive gear 6. Strainer
3. Driven gear 7. Relief valve assembly
4. Pump cover 8.
Oil pipe
Reassembly procedure is shown in the illustration above numerical order.
Pump cover fixing bolts torque: 16 N·m (1.6 kg·m/12 lb ft)
051R100006

ENGINE MECHANICAL 6A – 131

OIL FILTER AND OIL COOLER
DISASSEMBLY






























Disassembly Steps
1.
Oil filter cartridge 5.
Body
2.
Bolt 6. Oil cooler relief valve
3. Gasket 7. Regulating valve
4. Oil cooler
Disassembly procedure is shown in the illustration above numerical order.
050R300004

6A – 132 ENGINE MECHANICAL


INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during
inspection.
Oil Cooler
Water Leakage at Water Passage
1. Plug one side of the oil cooler water passage.
2. Submerge the oil cooler in water.
3. Apply compressed air (200kPa (2kg/cm
2 / 28psi)) to
the other side of the oil cooler water passage.
If air bubbles rise to the surface, there is water leakage.
Should be replaced oil cooler assembly.
050RY00002

ENGINE MECHANICAL 6A – 133

REASSEMBLY































Reassembly Steps
1.
Body 5.
Gasket
2.
Regulating valve 6. Bolt
3. Oil cooler relief valve 7. Oil filter cartridge
4. Oil cooler
Reassembly procedure is shown in the illustration above numerical order.
050R300003

6A – 134 ENGINE MECHANICAL


RTW46ASH001701












1. Body
2. Oil Filter Safety Valve
3. Oil Cooler Safety Valve
Tighten the oil filter
A and oil cooler B relief valve to the
specified torque.
Regulating Valve N·m(kg·m/lb ft)
A 64 (6.5/48)













4. Oil Cooler
5. Gasket
6. Bolt
Tighten bolt with gasket and oil cooler to the specified
torque.
Bolt Torque N·m(kg·m/lb ft)
40 (4.1/30)





7. Oil Filter Cartridge
1) Apply engine oil to the O-ring.
2) Tighten the oil filter cartridge to the specified torque.
Filter wrench: 5-8840-0201-0
Oil Filter Cartride Torque N·m(kg·m/lb ft)
18 (1.8/13)

050R300006
050RY00004

ENGINE MECHANICAL 6A – 135


INTER COOLER
REMOVAL AND INSTALLATION





RTW46ALF001001

Removal Steps
1. Radiator grille
2. Front bumper fascia
3. Front bumper inpact support assembly
4. Inter cooler

Installation Steps
4. Inter cooler
3. Front bumper inpact support assembly
2. Front bumper fascia
1. Radiator grille

6A – 136 ENGINE MECHANICAL





RTW36ASH000601
Removal
1. Radiator Grille

Refer to removal procedure in Sheet Metal section.







RTW36ASH000501
2. Front Bumper Fascia

Remove the nine clips and four screws.

Disconnect the fog light harness connectors.
















RTW46ASH002101
3. Front Bumper Impact Support Assembly

Remove the nut and two bolts.



4. Inter Cooler

Remove the nut and two bolts.

Disconnect the air hose.




Installation
4. Inter Cooler

Tighten the nut and two bolts.


3. Front Bumper Impact Support Assembly

Tighten the nut and two bolts.



2. Front Bumper Fascia

Install the nine clips and four screws.

Connect the fog light harness connectors.


1. Radiator grille

Refer to installation procedure in Sheet Metal section.