Piston And Connecting Rod - Kubota SM-E4B Series Workshop Manual

SM-E4B SERIES, WSM

(5) Piston and Connecting Rod

Connecting Rod Cap
1. Remove the connecting rod caps (1) using a bihexagonal 8 mm
socket.
(When reassembling)
• Align the marks (a) with each other. (Face the marks toward the
injection pump.)
• 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.
Tightening torque Connecting rod screw
(1) Connecting Rod Cap
Piston
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.
3. Draw out the other pistons after the same method as above.
(When reassembling)
• Before inserting the piston into the cylinder, apply enough
engine oil to the cylinder.
• When inserting the piston into the cylinder, face the mark on the
connecting rod to the injection pump.
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 of the piston rings as shown in the figure.
• Carefully insert the piston using a piston ring compressor
(1). Otherwise, their chrome-plated section may be
scratched, causing trouble inside the cylinder.
Models
Z482-E4B, D722-E4B
D782-E4B
Z602-E4B, D902-E4B
-1
(3200 min (rpm) spec.)
Z602-E4B, D902-E4B
-1
(3600 min (rpm) spec.)
(1) Piston Ring Compressor
(A) Top Ring Gap
(B) Second Ring Gap
(C) Oil Ring Gap
(D) Piston Pin Hole
1-S41
ENGINE
27 to 30 N·m
2.7 to 3.1 kgf·m
20 to 22 lbf·ft
(a) Mark
9Y1210785ENS0049US0
Mark
3
B
1C
2D
(a) 0.79 rad (45 °)
(b) 0.79 rad (45 °)
(c) 1.6 rad (90 °)
(d) Mark
9Y1210785ENS0050US0
KiSC issued 01, 2013 A