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(69)
ENGINE
OIL PUMP
2-47
hole throughout length. Check spring to see
that it is not collapsed, worn on its side, or
broken. Replace with a new spring if in doubt.
3. Check position of gear on
shaft.
The
measurement should be same as shown
·
in
figure 2-44.
4. Install gear and shaft assembly in pump
body and install idler gear with the rounded
end of teeth placed inward or away from the
pump cover.
5. Check for clearance between gears and
cover by using a steel straight edge as shown
in figure
2-45.
The clearance between straight
edge and gears should be such that the gears
turn freely and must not be more than .004".
6. Install pump cover and tighten all cover
screws,
then'
turn pump shaft to check for
bind.
Shaft and gears must turn freely and a very
slight amount of end play should also exist.
7. Attach screen and float assembly to pump
cover and make sure that it is securely retained
.
by the cotter pin, that it swings freely, and
that the stops permit full range of vertical
movement.
8. Attach pump assembly to crankcase, using
the proper gasket which is of thin fiber.
Tight-
CHECK FOR
CLEARA
~ j C E
B
ETIN EEN GEAR
S
STRA
I GHTEDGE
\ NOT MORE TH
AN
.004 I
Figure 2-4S-Checking Clearance of Gears at Cover
en the two attaching screws
evenly.
9. Test pump alignment by twisting the
pump shaft with fingers; shaft should turn
freely within the limits of gear
backlash.
-Make
this test every 180
0
through two complete revo-
lutions of crankshaft.
If
pump shaft is not free
in all positions, loosen attaching screws and
shift pump to such a
position'
as to relieve all
binding.
10.
If
tightness still exists, it may be due to
the limits to which the pump body was ma-
chined, or to a rebuilt distributor assembly,
01'
both.
In this case it will be necessary to remove
pump assembly and the distributor and grind a
slight amount from ends of pump and
distribu-
tor shafts to provide a slight end
clearance.
See
figure 2-46. The distributor gear must be re-
moved, and when reinstalled both ends of
retaining pin must be securely riveted. See
paragraph 10-51 for removal and proper in
-
stallation of distributor.
11.
If
low oil pressure persists after
check-
ing through oil pump, look for loose bearing
fits at crankshaft and camshaft.
Figure 2-46-Parts to be Ground for Shaft End Clearance
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