Kubota GR1600EC2, Workshop Manual, Page: 100 / 241

1-S33
GR1600EC2, WSM ENGINE
Main Bearing Case Assembly
1. Remove the two main bearing case screws 1 (1), and remove the
main bearing case assembly 1 (2), being careful with crankshaft
bearing 3 (4), (5).
2. Remove the main bearing case assembly (3) as above. Keep in
mind, however, that the thrust bearing (8) is installed in the main
bearing case assembly (3).
(When reassembling)
• Clean the oil passage in the main bearing cases.
• Apply clean engine oil on the bearings.
• Install the main bearing case assemblies in original positions.
Since diameters of main bearing cases vary, install them in order
to marking (b) from the gear case side. (Refer to the figure.).
• Match the alignment numbers (a) on the main bearing case
assembly 1.
• Do the same for the main bearing case assembly (3) too.
• When installing the main bearing case 1, face the mark
“FLYWHEEL” to the flywheel.
• Install the thrust bearing (8) 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.
W1034602
Tightening torque Main bearing case screw 1
12.7 to 15.7 N·m
1.3 to 1.6 kgf·m
9.4 to 11.6 ft-lbs
(1) Main Bearing Case Screw 1
(2) Main Bearing Case Assembly 1
(3) Main Bearing Case Assembly
(4) Crankshaft Bearing 3
(Upper, with oil groove)
(5) Crankshaft Bearing 3 (Lower)
(6) Crankshaft Bearing 2
(Upper, with oil groove)
(7) Crankshaft Bearing 2 (Lower)
(8) Thrust Bearing
(a) Alignment Number
(b) Marking
(c) Oil Groove
KiSC issued 07, 2006 A