Kubota WSM 05-E4B Series - Removing Main Bearing Case Assembly; Removing Alternator

(When reassembling)
• Clean
the
oil
passage of the crankshaft with
compressed air.
• Install the crankshaft assembly, aligning the screw
hole of main bearing case screw 2 with the screw
hole of crankcase.
• When tightening the main bearing case 2, apply oil
to the main bearing case screw 2 and screw by
hand before tightening the specific torque. If not
smooth to screw by hand, align the screw holes
between the crankcase and the main bearing case.
• Tighten to the specified tightening torque.
Tightening tor-
que
Main bearing case
screw 2
49 to 53 N⋅m
5.0 to 5.5 kgf⋅m
37 to 39 lbf⋅ft
5.28 Removing main bearing case
assembly
1. Remove the two
main bearing case screws 1 (2) of
each main bearing cases.
(1) Main bearing case assembly
1
(2) Main bearing case screw 1
(a) Alignment number
(b)
Marking (A, B, C)
2. Remove the main bearing case from crankshaft.
(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 the
original positions. Since diameters of main bearing
cases vary, install them in order of makings (b) (A,
B, C) from the gear case side.
• Match the alignment numbers (a) on the main
bearing case assembly 1.
• When installing the main bearing case 1 and 2, face
the mark "FLYWHEEL" to the flywheel.
• Install the thrust bearing (3) with its oil groove
facing outward.
(1) Main bearing case assembly
1
(2) Main bearing case screw 1
(3) Thrust bearing
• Make
sure that the main bearing case moves
smoothly
after
tightening the main bearing case
screw 1 to the specified torque.
• Tighten to the specified tightening torque.
Tightening tor-
que
Main bearing case
screw 1
30 to 34 N⋅m
3.0 to 3.5 kgf⋅m
22 to 25 lbf⋅ft
5.29 Removing alternator
1. Remove the pulley (1).
2. Remove the rear end cover (12).
3. Remove the brush holder (1
1).
4. Remove the IC regulator (10).
5. Remove the four screws holding the stator lead wires.
6. Remove the rectifier (9).
7. Remove the rear end frame (8).
8. Press out the rotor (6) from drive end frame (2).
9. Remove the retainer plate (5).
10. Press out the bearing (4) from drive end frame (2) with a press and jig.
SERVICING
5. Disassembling and assembling 4. ENGINE
05-E4B SERIES,05-E4BG SERIES
4-45
KiSC issued 03, 2023 A