Gear-To-Body Clearance - Jeep 1979 CJ-5 Technical & Service Manual

1B-56 Eli
(0.008 Inch preferred) [0.102 mm to 0.203 mm (0.203 mm
preferred)].
N O T E : Make certain gears are up into body as far as
possible.
If gear end clearance is excessive, measure gear
length. If gear length is correct, install thinner gasket. If
gear length is incorrect, replace gears and idler shaft.
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4 1 9 3 9 *'
Fig. 1B-86 Oil Pump Gear End Clearance Measurement—
Feeler Gauge Method
Gear-to-Body Clearance
(1) Insert feeler gauge between gear tooth and
pump body inner wall directly opposite point of gear
mesh. Select feeler gauge which fits snugly but freely
(fig. 1B-87).
(2) Rotate gears to check each tooth in this manner.
Correct clearance is 0.0005 to 0.0025 inch (0.0005 inch
preferred) or 0.013 mm to 0.064 mm (0.013 mm
preferred).
(3) If gear-to-body clearance is more than specified,
measure gear diameter with micrometer. If gear diame-
ter is correct, check gear end clearance and correct. If
gear clearance is acceptable and relief valve is function-
ing properly, replace timing case cover. If gear diameter
is incorrect, replace gears and idler shaft.
N O T E : If oil pump shaft or distributor drive shaft has
broken, inspect for loose oil pump gear-to-shaft fit or
worn front cover. Oversize pump shafts are not
available.
Installation
(1) Install oil pressure relief valve in pump cover
with spring and retaining cap.
(2) Install idler shaft, idler gear and drive gear
assembly.
4 1 9 4 0
Fig. 1B-87 Gear-to-Body Clearance Measurement
N O T E : To ensure self-priming of the oil pump, fill
pump with petroleum jelly prior to the installation of
the oil pump cover. Do not use grease of any type.
(3) Install pump cover and oil filter assembly with a
replacement gasket. Tighten retaining screws to 55 inch-
pounds (6 N»m) torque.
Oil Pan
Removal
(1) Drain engine oil.
(2) Remove starter.
(3) On CJ models:
(a) Remove frame cross bar.
(b) Remove automatic transmission cooler
lines, if equipped.
(c) Cut corner of engine mount on right side
with hacksaw to provide clearance for pan removal, if
required.
(4) On all models, bend tabs down on dust shield, if
equipped with manual transmission.
(5) Remove oil pan attaching screws. Remove oil
pan.
(6) Remove oil pan front and rear neoprene oil
seals.
(7) Thoroughly clean gasket surfaces of oil pan and
engine block. Remove all sludge and dirt from oil pan
sump.
Installation
(1) Install replacement oil pan front seal to tim-
ingcase cover. Apply generous amount of Jeep Gasket-
in-a-Tube (RTV silicone), or equivalent, to end tabs.