Nanni 5.280HE Workshop Manual page 85

03-M Series, WSM
Main Bearing Case Assembly
1. Remove the two main bearing case screws 1 (8), and remove the
main bearing case assembly being careful with thrust bearing
and crankshaft bearing.
2. Remove the main bearing case 1, 2 as above.
(When reassembling)
• Clean the oil passage in the main bearing case.
• Apply clean engine oil on the bearings.
• Install the main bearing case assemblies in the original positions.
Since diameters of main bearing cases vary, install them in order
of makings (A, B for 3 cylinders and A, B, C for 4 cylinders) from
the gear case side.
• Match the alignment numbers (1) and mark (2) on the main
bearing case.
• When installing the main bearing case 1 and 2, face the mark
"FLYWHEEL" to the flywheel.
• Install the thrust bearing with its oil groove facing (7) outward.
• Confirm that the main bearing case moves smoothly after
tightening the main bearing case screw 1 (8) to the specified
torque.
Tightening torque Main bearing case screw 1
(1) Alignment Number
(2) Alignment Mark
(3) A
(4) B
S-68
DIESEL ENGINE
46.1 to 51.0 N·m
4.7 to 5.2 kgf·m
34.0 to 37.6 ft-lbs
(5) C
(6) No Mark
(7) Oil Groove
(8) Main Bearing Case Screw 1
W1027366
KiSC issued 08, 2012 A