wsm Kubota L4100 Workshop Manual page 111

L4100, WSM
Crankshaft
NOTE
• Before disassembling, check the side clearance of
crankshaft. Also check it during reassembling.
1. Remove the main bearing case screw 2 (1).
2. Pull out the crankshaft assembly, taking care not to damage the
crankshaft bearing 1.
(When reassembling)
IMPORTANT
• Install the crankshaft sub assembly, aligning the screw
hole of main bearing case 2 with the screw hole of cylinder
block.
• When tightening the main bearing case screw 2, apply oil to
the screw and screw by hand before tightening the specific
torque.
If not smooth to screw by hand, align the screw holes
between the cylinder block and the main bearing case.
Tightening torque Main bearing case screw 2
(1) Main Bearing Case Screw 2
Main Bearing Case Assembly
1. Remove the two main bearing case screws 1, and remove the
main bearing case assembly (2) being careful with thrust
bearing (3) and crankshaft bearing 2.
2. Remove the main bearing case 1, 2 and 3.
(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, C) from the gear case side.
• Match the alignment numbers (4) and mark (5) on the main
bearing case.
• When installing the main bearing case 1, 2 and 3, face the mark
"FLYWHEEL" to the flywheel.
• Install the thrust bearing with its oil groove facing outward.
• Confirm that the main bearing case moves smoothly after
tightening the main bearing case screw 1 to the specified
torque.
Tightening torque Main bearing case screw 1
(1) Main Bearing Case Assembly 1, 2
and 3
(2) Main Bearing Case Assembly
1-S39
ENGINE
69 to 73 N·m
7.0 to 7.5 kgf·m
51 to 54 lbf·ft
9Y1210278ENS0055US0
46 to 50 N·m
4.7 to 5.2 kgf·m
34 to 37 lbf·ft
(3) Thrust Bearing
(4) Alignment Number
(5) Alignment Mark
9Y1210278ENS0056US0
KiSC issued 08, 2012 A
(EU)