Kubota B1830, Workshop Manual, Page: 148 / 548

ENGINE B1830,B2230,B2530,B3030, WSM
1-S47
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 piston in the same method as above.
(When reassembling)
• Before inserting the piston into the cylinder, apply enough
engine oil to the piston.
• 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 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.
9Y1210003ENS0069US0
(1) Piston Ring Compressor
(A) Top Ring Gap
(B) Second Ring Gap
(C) Oil Ring Gap
(D) Piston Pin Hole
(a) 0.785 rad (45 °)
(b) 0.785 rad (45 °)
(c) 1.57 rad (90 °)
KiSC issued 05, 2012 A