Jeep UNIVERSAL CJ-2A - Page 45

D
L4-134 ENGINE
on later models, and 20 lb. [1,406 kg-cm2) at 2000
rpm. (32 mph. [51 kph.]).
NOTE: Safe minimum pressure of the earlier type
pump is 10 psi. [0,7 kg-cm2) at idle speed. Normal
gauge reading will be. 50 at 30 mph. [48 km-hr.]
FIG. SS~CHECKING OUTER ROTOR TO
OIL PUMP BODY
FIG. 56~CHECKING OIL PUMP COVER
D-63. Oil Pan
Examine the oil pan carefully for evidence of' cor-
rosion, dents, or other damage. Special attention
should be given to the mounting flange to be sure
of proper alignment and a tight seal at the cylinder
block, oil pan, and engine front plate. Whenever
the oil pan is removed, it is best to install a new
oil pan gasket. ·
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D-64. Flywheel
The flywheel is mounted on the rear flange of the
crankshaft. The crankshaft, flywheel, and clutch
assembly are statically and dynamically balanced
separately and as a unit; therefore, these com-
ponents should be assembled in their original rela-
tive positions to maintain this balance.
D-65. Flywheel Inspection
Clean the flywheel thoroughly with cleaning sol-
vent. Inspect the clutch face of the flywheel for
a burned or scuffed condition or rivet grooves.
Check the flywheel for run-out or improper mount-
ing according to the installation procedure given
in Par. D-79.
If the inner ends of the flywheel ring gear teeth are
only slightly burred or snubbed, remove the burrs
and reshape the teeth using a small emery wheel.
If, however, the teeth are broken, cracked, or
seriously burred, the ring gear should be replaced.
D-66. Ring Gear Replacement
The ring gear is secured on the flywheel by a shrink
fit. Before starting the operation of replacing the
ring gear, place the new ring gear against the old
gear to make certain both have the same number of
teeth.
To remove the ring gear from the flywheel, drill a
%" [9,5 mm.] hole through the ring gear and cut
through any remaining metal with a cold chisel.
Remove the ring gear from the flywheel. Thorough-
ly clean the ring gear surface of the flywheel. Heat
the new ring gear evenly to a range of 650°F. to
700°F. [343°C. a 371 °C.] and place it on the cold
flywheel, making certain that the chamfer on the
teeth is on the crankshaft side of the flywheel. Be
sure that the ring gear is firmly seated on the fly-
wheel. Allow the ring gear to cool slowly to shrink
it onto the flywheel. Do not quench the ring gear;
allow it to slowly air cool.
D-67. Flywheel Housing
The flywheel housing, which encloses the flywheel
and clutch is bolted to the engine rear plate and
cylinder block. The rear of the housing provides
the front support for the transmission. Examine
the housing for cracks and distortion of the
machined surfaces. The front face must seat evenly
against the engine rear end plate without evidence
of warpage. The rear face must be parallel to the
front face. Improper alignment may cause trans-
mission gear disengagement. In addition, the open-
ing in the rear of the housing, which serves as a
pilot for the transmission, must be concentric with
the crankshaft. The flywheel housing should be
checked for alignment after it is installed on the
engine.
D-68. Core Hole Expansion Plugs
Any evidence of coolant leakage around any of
the core hole expansion plugs will require replace-
ment of the plug. The expansion plug at the rear
end of the cylinder block can be driven out with a
24" [60 em.] length of half-inch bar stock carefully
inserted through the camshaft bore in the cylinder