Page 1185 of 4264

ENGINE MECHANICAL 6A – 45
4JA1L
RTW46ASH001001
4. EGR Valve
1) Remove four nuts and remove the EGR valve
assembly from the intake manifold.
2) Remove four bolts and remove the adapter from the
EGR valve assembly.
4JA1TC RTW46ASH000901
5. Oil Level Gauge
1) Disconnect PCV hose.
2) Remove two bolts and remove the engine oil level
gauge.
6. Fuel Filter Assembly (Except EURO III model)
1) Disconnect fuel hose.
2) Remove two bolts and remove the fuel filter.
7. Fuel Filter Bracket (Except EURO III model)
Remove three bolts and remove the fuel filter bracket with
leak pipe.
4JH1TC RTW36ASH001201
8. Fuel Injection Pipe with Clip
1) Loosen the injection pipe sleeve nuts at pump side
and nozzle side.
Do not apply excessive force to the injection pipes.
2) Loosen the injection pipe clips.
3) Remove the injection pipe.
NOTE:
Plug the delivery holder ports with the caps to prevent the
entry of foreign material.
9. Power Steering Oil Pump Bracket
RTW36ASH000701
10. Intake Manifold
1) Disconnect the PCV hose from the cylinder head
cover.
2) Remove the intake manifold with gasket.
11. Engine Mounting Bracket and Foot
12. Injection Pump Cover
Page 1186 of 4264
6A – 46 ENGINE MECHANICAL
13. Injection Pump
Rrefer to secton 6C-19 (Injection Iump)
14. Starter Motor
15. Oil Pressure Warning Switch
16. Fuel Leak Off Pipe
17. Oil Cooler Water Pipe
18. Cooling Fan Pulley
19. Heat Protector
20. Catalytic Converter
21. Turbocharger
1) Disconnect the water hose between thermostat
housing cover and turbocharger.
2) Disconnect the water hose between water inlet pipe
and turbocharger.
3) Remove the oil feed pipe.
4) Remove the oil return pipe.
5) Remove the turbocharger and the gasket.
NOTE:
Plug the turbocharger body oil ports and water ports after
removing the turbocharger assembly to prevent the entry
of foreign material.
22. Compressor Bracket
23. Vacuum Pump Oil Return Hose
24. Generator and Adjusting Plate
25. Water Inlet Pipe
26. Generator Bracket
27. Oil Cooler with Oil Filter
28. Exhaust Manifold
027R100007
037RY00001
Page 1187 of 4264
ENGINE MECHANICAL 6A – 47
1
DISASSEMBLY
INTERNAL PARTS
MAJOR COMPONENTS
Disassembly Steps-1
1.
Water bypass hose 5.
Rocker arm shaft and rocker
2.
Thermostat housing with thermo arm
switch 6. Push rod
3.
Cylinder head cover 7.
Cylinder head
4.
Injection nozzle and bracket 8.
Cylinder head gasket
011R300001
Page 1188 of 4264
6A – 48 ENGINE MECHANICAL
RTW46ALF000101
Disassembly Steps-2
9. Crankshaft damper pulley
10. Timing gear case cove
11. Water pump
12. Idle gear "B" and shaft
13. Idle gear "A"
14. Idle gear shaft
15. Crankshaft timing gear
16. Injection pump
Page 1189 of 4264
ENGINE MECHANICAL 6A – 49
014R300005
Disassembly Steps-3
17. Flywheel 27. Piston and connecting rod with
18. Crank case upper bearing
19. Oil pump with oil pipe 28. Crankshaft bearing cap with
20. Camshaft timing gear lower bearing
21. Camshaft thrust plate 29. Crankshaft thrust bearing
22. Camshaft 30. Crankshaft
23. Timing gear case 31. Crankshaft upper bearing
24. Cylinder body rear plate 32. Tappet
25. Piston cooling oil jet 33. Crankshaft rear oil seal
26. Connecting rod bearing cap with 34. Cylinder body
lower bearing
Page 1190 of 4264
6A – 50 ENGINE MECHANICAL
Disassembly
1. Water Bypass Hose
2. Thermostat Housing with Thermo Switch
3. Cylinder Head Cover
4. Injection Nozzle and Bracket
1. Remove the injection nozzle bracket bolts.
2. Use the injection nozzle remover and the sliding
hammer to remove the injection nozzle together.
Injection Nozzle Remover: 5-8840-2723-0
Sliding Hammer: 5-8840-0019-0
5. Rocker Arm Shaft and Rocker Arm
Loosen the rocker arm shaft bracket bolts in numerical
order a little at a time.
Note:
Failure to loosen the rocker arm shaft bracket bolts in
numerical order a little at a time will adversely affect the
rocker arm shaft.
6. Push Rod
7. Cylinder Head
Loosen the cylinder head bolts in numerical order a little at
a time.
Note:
Failure to loosen the cylinder head bolts in numerical
order a little at a time will adversely affect the cylinder
head lower surface.
8. Cylinder Head Gasket
9. Crankshaft Damper Pulley
011R100002
011RY00005
011RY00006
011RY00007
Page 1191 of 4264

ENGINE MECHANICAL 6A – 51
10. Timing Gear Case Cover
The timing gear case is tightened together with the
injection pump at the 6 points indicated by the arrows in
the illustration.
11. Water Pump
12. Idle Gear B and shaft
Before removing the idle gear B, install bolt (M6,L=30) to
the hole marked with an arrow in the illustration to hold the
scissor gear in place.
13. Idler Gear "A"
1. Measure the camshaft timing gear backlash and the
crankshaft timing gear backlash before removing the
idler gear.
2. Measure the idler gear end play before removing the
idler gear.
NOTE:
Refer to the following items for details on the backlash
and end play measurement procedures.
Timing Gear Backlash Measurement
1. Set a dial indicator to the timing gear to measured.
Hold both the gear to be checked and the adjusting
gear stationary.
2. Move the gear to be checked as far as possible to
both the right and the left.
Take the dial indicator reading.
If the measured value exceeds the specified limit, the
timing gear must be replaced.
Timing Gear Backlash mm (in)
Standard Limit
0.10 - 0.17 (0.0039 - 0.0067) 0.30 (0.012)
020L200006
020L200020
020RY00019
020RY00020
Page 1192 of 4264
6A – 52 ENGINE MECHANICAL
RTW36ASH000801
Idler Gear "A" End Play Measurement
Insert a feeler gauge between the idler gear and the thrust
collar to measure the gap and determine the idler gear
end play.
If the measured value exceeds the specified limit, the
thrust collar must be replaced.
Idler Gear End Play mm (in)
Standard Limit
0.07 (0.0028) 0.2 (0.0079)
4JA1T(L)
040R300009
14. Idle Gear Shaft
15. Crankshaft Timing Gear
4JA1TC/4JH1TC RTW36ASH001301
16. Injection Pump
1. Remove the injection pump cover (4JA1TC/4JH1TC
only).
2. Remove the injection pump bracket.
3. Pull the injection pump along with the injection pump
timing gear free toward the rear of the engine.
NOTE:
Plug the injection pump delivery ports with the caps to
prevent the entry of foreign material.
17. Flywheel
Loosen the flywheel bolts in numerical order a little at a
time.
Use the gear stoper to stop the flywheel gear.
Gear stoper: 5-8840-0214-0
18. Crank Case
19. Oil Pump With Oil Pipe
015RY00001