Jeep UNIVERSAL CJ-2A - Page 80

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
E
E-71 A. Flywheel· Pilot Bushing
Inspect the flywheel pilot 'bushing in the flywheel.
For procedure on replacing the bushing, refer to
Par. J-14.
E-72. 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 opem-
ing in the rear of the housing, which serves as a
pilot for the transmission, must be concentric with
the crankshaft. The flywheel housing sho~ld ·be
checked for alignment after it is installed on the
engine. Refer to Par. E-89.
E-73. Core Hole Expansion Plug
Any evidence of coolant leakage around any of
the core hole expansion plugs will require replace-
ment of the plug. The expansion plug at tile 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
block. The other core hole expansion plugs in the
cylinder block and cylinder head can be removed
by piercing the center with a sharp tool and prying
them out. Before attempting to install a new plug,
clean the hole thoroughly. Apply a thin coat of
seaier on the new plug and install the plug ·:with a
driver.
E-74. Cylinder Head
Be sure that water passages are open and that
all carbon is removed. Inspect all tapped openings.
Repair any damaged threads or broken studs. Run
a tap in the threaded holes to clean up rough or
damaged threads. Before using ·a tap, squirt
penetrating oil on the threads. Discard or repair
cracked cylinder heads, also those warped .010"
[0,254
mm.] or m6re over the full length of the head.
FIG. lOOA-VACUUM TEE
The right side o£ the cylinder head has a vacuum
tee positioned at a 17° angle. When installing a
vac~um-operated heater, remove the Yij" pipe
plug from the tee, replacing it with a connector
and vacuum tube for heater hook-up. See Fig. 100A.
E• 75. Rocker Arms
The rocker arms and their related parts are
/mounted on the top of the cylinder head and en-
closed
by the rocker arm cover. The rocker arm
shaft, supported in four rocker arm shaft brackets,
carries the rocker arms and the rocker arm shaft
springs. The intake valve adjusting screws and
locknuts provide the means for adjusting these
valves.
E-76. Rocker Arm Shaft Disassembly
a. Remove the two studs in the rocker arm shaft
brackets at the ends of the rocker arm shaft.
b. Slide the rocker arm shaft brackets, the four
rocker arm assemblies, and the two rocker arm
shaft springs off the rocker arm shaft. Remove the
two rocker arm shaft lock screws from the two re-
maining rocker arm shaft brackets and slide the
brackets off the shaft.
c. Insert a screwdriver under the edge o( the
rocker arm shaft plugs at each end of the rocker
arm shaft, and pry the plugs out of the shaft.
d. Remove the intake valve adjusting screw lock-
nuts from each of the rocker arm valve lash ad-
justing screws. Rem6ve the screws from the rocker
arms.
E-77. Inspection and Repair
Run a round wire brush through the bore of the
rocker arm shaft and clean out the drilled oil holes.
Clean out the oil holes in the rocker arm shaft
brackets, and the oil holes and grooves in the bores
of the rocker arm.
Inspect the diameter of the shaft at the rocker arm
bearing areas. Replace the shaft if there are scores
or abrasion marks along the length of the shaft.
Check the shaft for alignment by rolling it across
a
smooth level surface. If the shaft will not roll
freely,
or if it rolls with a bumping motion, th~
shaft is out of alignment and must be replaced.
Inspect the threads of the adjusting screw hole in
the rocker arms and if necessary clean with a
proper size tap. Replace the adjusting screw lock-
nut or the adjusting screw if either part is damaged
or deformed.
Inspect the threads in the tapped hole in the top
of the rocker arm shaft brackets and if necessary
clean
with a proper size tap. Replace the bracket
if either side is worn or scored.
E-78. Assembly
a. Install two rocker ann shaft plugs, one in each
end of the shaft. Slide two rocker arm shaft brackets
onto the center of the shaft. Align the tapped holes
in the brackets with the drilled holes in the top of
the shaft and install the rocker arm shaft lock
screws,
making sure the points of the screws enter
the drilled holes in the shaft.
b. Screw the intake valve adjusting screws into
the rocker arms and install the locknuts.
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