Onan MJA Series Service Manual page 85

PISTONS. CONNECTING
ROn..s.
." .. ,
AN.D CYLINDERS 83
o
.1
with the"V"mark on the
piston toward the front of
the. engine.
5. Position each connecting
rod On the crankshaft and
oil the journal and instan
its rod cap with bearing
half. When installing the
rod cap, position so the
raised witness mark on
the forging matches the
mark on the connecting
rod (Fig 3. 8. D).
1
('i
1
.~
6 . Tighten the cap screws to
the specified torque.
7.
Crank the engine over by
hand to see that all bearings
FIG 3.8.D - CONNECTING ROO,
are free.
WITNESS MARK
8.
Reinstall the oil base with a newgaskeL
9.
Reinstall the cylinder heads, sect
3. 7.3.5.
10. Replace oil and coolant.
3.B.9 BREAK-IN PERIOD
Whenever new rings or pistons are installed or the cylinder refinished"
the engine must be run-in before .regular operation can be resumed.
Run the engine for 15-20 minutes at no load, about 1/2 hour at 1/3 ·loal
and 2 - 3 hours at 2/3 load. Then regular operation can be resumed.