Kubota L3540, Workshop Manual

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1-S54
L3540, L4240, L5040, L5240, L5740, WSM ENGINE
Crankshaft
NOTE
Q
• Before disassembling, check the side clearance of
crankshaft. Also check it during reassembling.
For V2203-M
1. Remove the main bearing case screw 2 (1).
2. Pull out the crankshaft assembly, taking care not to damage the
crankshaft bearing 1 (3).
For D1803-M
1. Remove the main bearing case screw 2 (1).
2. Turn the crankshaft to set the crank pin of the third cylinder to the
bottom dead center. Then draw out the crankshaft until the crank
pin of the second cylinder comes to the center of the third
cylinder.
3. Turn the crankshaft by 2.09 rad (120
°
) counterclockwise to set
the crank pin of the second cylinder to the bottom dead center.
Draw out the crankshaft until the crank pin of the first cylinder
comes to the center of the third cylinder
4. Repeat the above steps to draw out all the crankshaft.
For V2403-M
1. Remove the main bearing case screw 2 (1).
2. Turn the crankshaft to set the crank pin of the 4th cylinder to the
horizontal directions (Right or Left). Then draw out all the
crankshaft, holding the crank pins to the horizontal directions
(Right or Left).
(When reassembling)
IMPORTANT
Q
• Install the crankshaft sub assembly, aligning the screw hole
of main bearing case 2 (2) with the screw hole of cylinder
block.
• When tightening the main bearing case screw 2 (1), 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.
W1066311
Tightening torque
Main bearing case screws
2
69 to 73 N·m
7.0 to 7.5 kgf·m
51 to 54 lbf·ft
(1) Main Bearing Case Screw 2
(2) Main Bearing Case 2
(3) Crankshaft Bearing 1 (a) Cut place for removing and
installing the crankshaft
[A] D1803-M
KiSC issued 04, 2010 A