Operation
1132−1/A1
Winterthur Gas & Diesel Ltd.
1/ 1
Main Bearing
1. General
The main bearing has a lower bearing shell (7, Fig. 1) and an upper bearing shell (5).
The running surfaces of the bearing shells are lined with white metal.
The lower bearing shell (7) is installed in the bearing girder (9) of the bedplate and the
upper bearing shell (5) in the bearing cover (4). The screws (6) engage and hold the
top bearing shell and bottom bearing shell in position.
The spring dowel pin (10) helps to get the bearing cover (4) in position.
The elastic studs (2) have a non-hardening locking compound applied to the threads.
Hydraulic tension is applied to the the elastic studs (2) during the install procedure.
The round nuts (3) keep the bearing cover (4) against the bearing girder (9).
2. Lubrication
Oil flows from the bedplate side through the oil inlet (OI) to the main bearings. The oil
flows through the grooves (OG) and bores (OB) to the running surface of the main
bearing.
6
OI
1
2
3
4
6
7
5
8
9
OB
OG
10
016.778/08
WM
Fig. 1: Main Bearing
1 Column 9 Bearing girder
2 Elastic stud 10 Spring dowel pin
3 Round nut
4 Bearing cover
5 Upper main bearing shell OB Oil bore
6 Screw OG Oil groove
7 Lower main bearing shell OI Oil inlet
8 Crankshaft WM White metal
2014
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