Specifications
4M41 ENGINE -
Crank Shaft and Crank Case
11B-25-2
Removal steps
1. Bolt
"
F
A 2. Front plate
3. Stiffener
4. Stiffener RH
5. Stiffener LH
6. Bolt
7. Rubber spacer
8. Dust cover
9. Rear plate
10. Bolt
"
E
A 11. Rear oil seal
"
E
A 12. Rear oil seal case
13. Bolt
14. Main cap bolt
A
A
""
D
A 15. Lower crankcase assembly
"
A
A 16. Lower main bearing
17. Lower crankcase
"
B
A 18. Lower thrust plate
19. Crankshaft assembly
A
B
""
C
A 20. Crankshaft gear
21. Key
22. Crankshaft
"
B
A 23. Upper thrust plate
24. Upper crankcase assembly
"
A
A 25. Upper main bearing
26. Check valve
27. Oil jet
28. O-ring
29. Upper crankcase
Caution
1. The lower crankcase 17 and upper crankcase 29 have been machined in a pair. Therefore,
replacing either one of the pair is not allowed.
2. The front plate 2 is held in position with the idler shaft, in addition to locating pin.
3. The main cap bolt 14 is tightened to a plastically deformed point. If it shows the evidence
of having been tightened three times, replace it.
4. Do not remove the crankshaft gear 20 unless absolutely necessary.
PRE-REMOVAL INSPECTION
CRANKSHAFT
Before removing the lower crankcase assembly
15
, measure
the end play of the crankshaft assembly
19
. If the reading
exceeds the specified limit, replace the thrust plate
18
,
23
with an oversize one.
Standard value: 0.10 - 0.28 mm
Limit: 0.4 mm
<Available oversize thrust plates>
+0.15 mm, +0.30 mm, +0.45 mm
REMOVAL SERVICE POINTS
A
A
"
LOWER CRANKCASE ASSEMBLY CREMOVAL
(1) Gradually loosen the bolts
13
in the sequence of numbers
1 - 16 shown in the illustration.
(2) Then, gradually loosen the main bearing cap bolts
14
in the sequence of numbers 17 - 26 shown, and remove.
A
B
"
CRANKSHAFT GEAR REMOVAL
Using the special tool, remove the crankshaft gear
20
.
Caution
1. Before attaching the special tool, install a protective
bolt A (M16 x 1.5 mm ; 30 mm long) to the crankshaft
end so that the crankshaft will not be damaged by
the special tool.
2. Do not tap on the crankshaft gear 20 to remove it.
PWEE9409-D
E
Feb. 2000Mitsubishi Motors Corporation Added
1
5
2
3
4
6
7
8
9
10
11
12
13
18
16
14
17
15
19
20
24
22
25
26
21
23
MH062469
A
20