wsm STW37 Workshop Manual page 139

STW34, STW37, STW40, WSM
Crankshaft
NOTE
• Before disassembling, check the side clearance of
crankshaft. Also check it during reassembling.
For D1703-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.
(When reassembling)
IMPORTANT
• 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.
Main bearing case screws
Tightening torque
2
(1) Main Bearing Case Screw 2
(2) Main Bearing Case 2
(3) Crankshaft Bearing 1
1-S60
ENGINE
69 to 73 N·m
7.0 to 7.5 kgf·m
51 to 54 lbf·ft
(a) Cut place for removing and
installing the crankshaft
[A] D1803-M
9Y1211109ENS0087US0
KiSC issued 11, 2014 A