Big-End Bearings
Inspection / Disassembly
A5.05. 02.04.01.01
15000, 30000
M20
en / 30.05.2000 IB021371 1/3
02
Ĺ
See also: 02.03.09.nn
Spare parts list: B1.05.02.2.2601
Time requirement: 1 Pers./ 0,50 h
Personnel qualification: Chief engineer, skilled engine hand
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Operating medium: Heavy fuel
Inspection:
a) of a big-end bearing after 15,000 h
b) exchange of all big-end bearings after 30,000 h
Tools:
Piston suspension equipment W1 2.9226-A
Torque wrench 60 - 420 Nm 3/4" W2 * 1.9454-060
Tightening angle gage big-end bolts W3 2.9180-A
Turning rod W4 * 2.9100-380
* not available as figure
Auxiliary material:
Molykote paste “G-Rapid Plus” **
** or a product of equal standard
Note:
Coat threads and contact surfaces of
the bolts with Molykote paste “G-Rapid
Plus”. Before removing the big-end
bearing, measure clearance “K”.
Sequence of operations:
1. Clearance measurement
1.1 Turn crankpin approx. 20° before TDC
to camshaft side.
1.2 Loosen all big-end bolts.
1.3 Pretighten bolts 3 and 4 with a torque
M = 160 Nm
and measure dimension x
1
between the
bore holes on the camshaft side with
caliper gage (Fig. 1).
Y
Y
4
x
1
Fig. 1
3
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