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CRANKSHAFT MAIN BEARINGS MAINTENANCE
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TM-10-3930-660-24-2 Truck Forklift; 6 000 lb. Variable Reach Rough Terrain Manual
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CLEANING -832450403
TM 10-3930-660-24-2
CRANKSHAFT MAIN BEARINGS MAINTENANCE - CONTINUED
0272 00
REMOVAL - CONTINUED
NOTE
If main bearing position number on bearing cap is missing or hard to read, etch the correct number on the
bearing cap so that it is facing the oil cooler side of the engine.
Remove one main bearing set at a time.
4.
Remove two capscrews (1) and bearing cap (2) from main bearings (2 thru 7) only. DO NOT remove bearing caps from
main bearings 1 and 7 at this time.
CAUTION
If crankshaft is turned in the wrong direction, the tab on the upper bearing half will be pushed between the
crankshaft and main bearing bore in the block. This could cause damage to the block and the crankshaft.
5.
Install bearing removal/installation tool into oil hole in crankshaft journal for main bearing being removed.
6.
Slowly turn crankshaft so the bearing removal/installation tool pushes against the end of the bearing opposite the tab,
and upper bearing half (3) is out of the cylinder block.
7.
Remove bearing removal/installation tool from crankshaft oil hole.
8.
Remove lower bearing half (4) from bearing cap (2). Keep bearing caps (2) and upper and lower bearings (i.e. 3 and 4)
together as a set.
NOTE
When bearings are reused, each bearing must be installed in its original location because the bearing sur-
faces have a wear pattern matched to the crankshaft journals.
9.
Repeat steps 6 thru 8 for remaining main bearings and thrust bearing (5) at main bearing position no. 6.
CRANKSHAFT
JOURNAL
3
5
BEARING REMOVAL/
INSTALLATION TOOL
409-4108
2
4
1
409-1930
0272 00-2

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