5.1.2
Main bearing
The main bearings hold the crankshaft (007,
) and transmit the forces through the
bearing girders (008) into the bedplate.
The bottom bearing shell (006) is installed in the bearing girder (008) of the bedplate and the top
bearing shell (004) in the bearing cover (003). The screws (005) engage and hold the top bearing
shell and bottom bearing shell in position. The spring dowel pin (009) helps to get the bearing
cover (003) in position.
The elastic studs (001) have a non-hardening locking compound applied to the threads. Hydraulic
tension is applied to the elastic studs during the install procedure. The round nuts (002) keep the
bearing cover (003) against the bearing girder.
Oil flows from the bedplate through the oil inlet (011) to the main bearings. The oil flows through
the grooves (012) and bores to the running surface of the main bearing.
Fig 5-2
Main bearing (generic)
001
002
003
004
005
005
011
006
007
008
005
005
009
009
012
013
014
010
Legend
001
Elastic stud
008
Bearing girder
002
Round nut
009
Spring dowel pin
003
Bearing cover
010
Plug
004
Top bearing shell
011
Oil inlet
005
Screw
012
Oil groove
006
Bottom bearing shell
013
Oil bore
007
Crankshaft
014
White metal
X52
AA00-1132-00AAA-043A-A
Operation Manual
Main bearing
Winterthur Gas & Diesel Ltd.
- 116 -
Issue 002 2018-11