----------
PART
1 - ENGINE
SYSTEMS----------
46
R1-43
Piston Ring Assembly
Naturally Aspirated
1. 1st Compression Ring
2. 2nd Compression Ring
3. Oil Control Ring
PISTON
ASSEMBLY
INSTALLATION
INTO
BLOCK
1 . Select the correct bearing liners
as
in the
following crankshaft section
and
install in
the rod
and
cap, ensure the liner tang lo-
cates in the slots
of
the rod and cap.
Piston and Connecting Rod Installation
1. Soft
Drive
2.
Ring Compressor
2. Turn the crankshaft, to position
No.1
crankpin at the bottom of the stroke and
lubricate all parts with new engine oil. Us-
ing a ring compressor and a soft drive,
slide pistons into bores, ensuring grade
letter on pistons is towards the front
of
the
engine, Figure 47.
3. Ensure the connecting rod bearing liner,
seats on
the
crankpin with the bearing
cap
fitted to the connecting rod as a
matched assembly. Fit new bolts lubri-
cated with oil and tighten to a torque value
of
110 lbf ft (149N m) 15 Kgf m.
26
Turbocharged
1.
1st Compression Ring
2.
2nd Compression Ring
3.
Oil Control Ring
Connecting Rod Bearing Side Clearance
1 . Feeler Gauges
4. Using feeler gauges, check the side
clearance
of
each connecting rod to
crankshaft, Figure 48:
0.005-0.013
in
(0.13-0.33mm)
and
con-
tinue for remaining assemblies.
5. Refit the oil
pump
tube/screen, balancer
and oil pan as previously described, refill
engine oil
and
coolant
and
run the engine
checking for leaks.
BALANCER, MAIN BEARINGS,
FLYWHEEL
AND
CRANKSHAFT
NOTE: Replaceable bearing liners
are
in-
stalled in production to ensure correct crank-
shaft journal to bearing clearance is main-
tained in service. The main bearings can
be
overhauled with the engine in the tractor. The
crankshaft can
only
be serviced after removal
from the tractor.
To
remove the flywheel, the engine requires
to
be
split from the transmission housing
or
removed from the tractor totally.
Refer
to
"SE
PARA
TING
THE UNIT".
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