Removing Connecting Rod; Removing Pistons - Kubota WSM 05-E4B Series Workshop Manual

SERVICING
5. Disassembling and assembling

5.21 Removing connecting rod

1. Remove the connecting rod cap.
(When reassembling)
• Align the marks (a) with each other. (Face the
marks toward the injection pump.)
(a) Mark
• Apply engine oil to the connecting rod screws and
lightly screw it in by hand, then tighten it to the
specified torque.
If the connecting rod screw won't be screwed in
smoothly, clean the threads.
If the connecting rod screw is still hard to screw in,
replace it.
• The polished connecting rod screw with no marking
on the screw head has possibly used.
In this case, tighten this screw to the same torque
as normal one.
Tightening tor- Connecting rod
que screw

5.22 Removing pistons

1. Turn the flywheel and bring the piston to top dead
center.
2. Draw out the piston upward by lightly tapping it from
the bottom of the crankcase with the grip of a
hammer.
05-E4B SERIES,05-E4BG SERIES
42 to 46 N⋅m
4.3 to 4.6 kgf⋅m
31 to 33 lbf⋅ft
3. Draw out the other piston in the same method as
above.
(When reassembling)
IMPORTANT
• Do not change the combination of cylinder and
piston. Make sure of the position of each piston
by marking. For example, mark "1" on the No.1
piston.
• When installing the piston into the cylinder,
place the gaps of all the piston rings as shown
in the figure.
(A) Top ring gap
(B) Second ring gap
(C) Oil ring gap
(D) Piston pin hole
• Carefully insert the pistons using a piston ring
compressor (1). Otherwise, their chrome-plated
section may be scratched, causing trouble
inside the cylinder.
4. ENGINE
(a) 0.79 rad (45°)
(b) 0.79 rad (45°)
(c) 1.6 rad (90°)
4-41
KiSC issued 03, 2023 A