Kubota WSM User Manual

1-S43
ZD18(F) · ZD21(F) · ZD28(F), WSM
ENGINE
Main Bearing Case Assembly
1. Remove the two bearing case screws 1 (4), and remove the main
bearing case assembly (3), being careful with the thrust bearing
(2) and crankshaft bearing 2.
2. Remove the main bearing case assemblies 1 (5), 2 (1).
(When reassembling)
• Clean the oil passage in the main bearing case.
• Apply clean engine oil on the crankshaft bearing 2 and thrust
bearings.
• Install the main bearing case assemblies in the original positions.
Since diameters of main bearing case vary, install them in order
of makings (1, 2) from the gear case side.
• When installing the main bearing case assemblies 1 (5), 2 (1),
face the mark “FLYWHEEL” to the flywheel.
• Be sure to install the thrust bearing (2) with its oil groove facing
outward.
• Do not change the combination of crankshaft bearing and main
bearing case.
• Confirm that the main bearing case moves smoothly after
tightening the main bearing case screw 1 to the specified torque.
W1031597
Tightening
torque
Main bearing case
screw 1
D722
23.5 to 27.5 N·m
2.4 to 2.8 kgf·m
17.4 to 20.3 ft-lbs
D782
12.7 to 15.7 N·m
1.3 to 1.6 kgf·m
9.4 to 11.6 ft-lbs
D1105
29.4 to 34.3 N·m
3.0 to 3.5 kgf·m
21.7 to 25.3 ft-lbs
(1) Main Bearing Case Assembly 2
(2) Thrust Bearing (D782 and D1105)
(3) Main Bearing Case Assembly
(4) Bearing Case Screw 1
(5) Main Bearing Case Assembly 1
KiSC issued 04, 2009 A

Kubota WSM Specifications

General

Brand	Kubota
Model	WSM
Category	Lawn Mower
Language	English