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1. Screw pressure relief screw into
relief valve insert just enough to
start threads.
2. Apply washer and install relief
valve insert with pressure relief
screw. Tighten insert, do not
tighten relief screw.
3.
Cap and lock pressure relief
screw with dome nut and
washer
B. OIL PUMP DISASSEMBLY
1. Remove oil pump assembly and
filter from main housing cover
by removing capscrews and
hoses.
2.
Remove capscrews and
lockwashers securing pump cover,
pump body and adapter.
3.
Using as soft hammer, separate
cover, body and adapter from
spring pins. NOTE: FOR
REASSEMBLY, PUNCH MARK
ALONG SIDE OF COVER, BODY
AND ADAPTER.
4.
Remove pump gears resting in
adapter
5.
Remove dome nut and relief valve
insert. NOTE: PRESSURE RELIEF
SPRING IS UNDER TENSION.
6.
Unscrew and separate pressure
relief screw from relief valve insert.
Remove pressure relief spring and
plunger.
C. CLEANING AND INSPECTION
1.
Remove all permatex and clean all parts
with good grade cleaning solvent or
diesel fuel. Blow dry with compressed
air
2.
Inspect gears and oil pump for damage
or excess wear. See replacement wear
limits chart.
3.
Inspect cover and adapter for wear
caused by gears. Note: if grooving does
not exceed .030, grinding smooth can
repair both surfaces. (.030" max cut).
4.
Inspect bushings in cover for wear (see
wear limits p.23), out of round condition
or burrs. If they are worn, damaged or
loose, replace and ream to size (see
p.23).
5.
Inspect bushings (2) in adapter for wear,
out-of-round condition burrs. If bushings
are damaged, replace as necessary,
and ream to size (see p.23).
6.
Check relief plunger for free movement
in adapter bore. Replace if necessary
7.
Inspect all mating surfaces for
smoothness
8.
Check to see that each oil passage is
free from obstruction.
D. ASSEMBLY
1.
Generously lubricate pump gears with
lubriplate, Vaseline, or engine weight oil
and position them in adapter. NOTE: BE
SURE SPLINED ENDS (INSIDE
DIAMETER OF PUMP GEARS) ARE
TOWARD COVER.
2.
To both mating surfaces of body,
sparingly apply a very thin coat of
'SUPER 300' permatex or equivalent.
Too much sealer can prevent pump
from functioning.
3.
Place body on adapter and cover on
body following punch marks. Note: If
new body is used make sure sharp
inside corners are filed smooth.
4.
Secure cover and body to adapter with
capscrews and lock-washers, finger
tight.
5.
Drive spring pins (2) down through
cover into body and adapter until they
bottom in adapter. Drive 2 more spring
pins into body until flush with top of
cover.
6.
Insert pump shaft through adapter into
pump gear and revolve shaft to check
ease of operation.
7.
Tighten all 6 capscrews to 16 foot-
pounds torque.
8.
Remove any excess permatex from
seams with solvent
9.
Recheck for ease of operation
23
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