Yanmar 3YM30, Service Manual

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4. Disassembly and reassembly
86
(26)Removing the lube oil pump
Remove the lube oil pump from the gear case cover.
(27)Removing the idle gear
Loosen the three bolts holding the idle gear and pull out
the idle gear and shaft.
(28) Removing the camshaft
1) Push up tappet by turning a camshaft to remove it
from the cylinder block easily.
2) Loosen the thrust metal bolts through the holes of
the camshaft gear, and remove.
3) Pull out the camshaft gear and camshaft assembly
from the cylinder block.
NOTE:
The camshaft gear and camshaft are shrunk fit. They
must be heated to 180-200
°C
to disassemble.
(29) Removing the pistons and connection rods
1) Loosen the rod bolts and remove the large end
cap.
2) Push the connecting rod and pull out the piston &
connecting rod assembly.
Cover
Control
valve
Outer rotor
Inner rotor
Gear case cover
Bolt
Idle gear shaft
Idle gear
Gear case
Piston
Connecting rod
Rod bolt
Large end cap
Crankpin bearing
Gear case
(Removing piston and connecting rod)