(5) Snug tighten screws (24) at four corners.
(6) Finish tightening oil pan screws. Torque to
20 to 25 foot-pounds (27 to 34 joules).
(7) Install two screws and washers securing
battery cables and clamps to engine.
(8) Install support brackets (31) with screws (1),
lockwashers (2), washers (3), screws (29),
and lockwashers (30).
(9) Install six screws securing bypass oil filter
support bracket to engine block, then
connect bypass oil filter inlet hose coupling
at top of rear bypass oil filter.
couplings to tie on oil pan.
(11) Install ether lines with six clamps and
screws and attach ether line fittings at
manifolds and solenoid valve.
(12) Connect fuel inlet hose coupling at fuel
(13) Connect engine preheat hose coupling on
radiator line and two couplings on preheat
assembly. Install preheat hose support
brackets, screws, and washers.
connector, then connect cable and secure
with clamp, screw, and washer.
(15) Refill engine with proper lubricating oil in
accordance with the Operator/Crew and
Organizational Maintenance manual.
13-21. OIL PUMP. To inspect, test, replace, and repair
the oil pump, remove the oil pan in accordance with
paragraph 13-20, refer to figure 13-35, and proceed as
Disassembly and Inspection. To inspect the
components of the lubricating oil pump, the
pump must first be removed and disassembled.
Proceed as follows:
(1) Remove suction tube and discharge tube
from oil pump and lift off pump.
(2) Remove screws (16, 20, and 21) and
lockplates (17) securing pump body (38) to
(3) Carefully drive cover (25) (with soft hammer
or brass punch) from body (38) and remove
(4) Remove idler gears (29) from shafts (26);
remove shafts from pump body (38).
(5) Remove nut (6), spacer (7), intermediate
drive gear (8) and thrust washer (11). Press
out shaft (14).
(6) Press drive gear (15) from drive shaft (30).
Remove drive shaft assembly from body.
(7) Press internal gear (31) from shaft (30), if
shaft or gear is worn or damaged.
(8) Remove plunger cap (33); remove spring
(34) and plunger (35) from body (38).
(9) Inspect and replace all bushings and shafts
if worn or damaged.
(10) Replace cover, or body if finished surfaces
in gear pockets are scored or visibly worn.
(11) The drive and idler gears must be replaced
if worn, scored or damaged. Check all
hardware for worn or damaged threads.
Replace as necessary.
Test. Following reassembly, crank gears by
hand; they should turn smoothly and freely.
Reassembly and Repair. Repair by replacing
any worn or damaged parts and proceed as follows: