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 (3) Bar the engine over to assure pump has
(2) Remove bearing (4) and seal (12).
free rotation.
(3) Remove the 5 capscrews from cover plate
(4) Turn engine over with starting air until
(9) and remove head (23) and gasket (18). Tag gasket
pump is primed. It may be necessary to open pump
for installation identification.
discharge line slightly, to aid in priming the pump.
(4) Remove pin (21), seal (20), rotor (19),
When primed, tighten discharge line.
and bushing (22).
g. Adjustment.
(5) Loosen packing gland (3).
(6) Remove shaft (15), then remove packing
(1) Check the packing gland. If leaking, draw
(2) and packing gland (3).
it up tight, then back it off one-quarter turn.
(7) Remove two plugs (5) and gaskets (6).
(2) Start the engine and run AHFAD, then
(8) Remove valves (7 and 8). Tag valves for
check packing gland. Tighten if leaking.
installation identification.
(3) Reverse the engine to ASTERN. Check
d. Inspection, Cleaning, and Repair.
for leaks. Tighten if necessary.
(1) Clean all parts 'n clean fuel oil and wipe
NOTE
dry with a lint free cloth.
There is a pressure relief valve near
(2) Check the clearance between rotor (19)
the pump discharge (set for 15 psi)
and bushing (22). If the clearance exceeds 0.005 in.,
that will by-pass the fuel oil back to
replace rotor (19), oil seal (20), and bushing (22).
the day tank if the pressure becomes
(3) Use a straight edge along rotor shaft (15).
too high.
If bent, replace shaft.
CAUTION
(4) Use a wire brush to remove clinging
Tighten packing gland just tight
gasket material then wash in clean fuel oil, and wipe dry
enough to allow an occasional drip.
with a lint free cloth.
Excessive tightening of gland nut
NOTE
will score the shaft.
Use new gaskets at assembly and
installation.
3-10. Fuel Priming Pump
(5) Remove all packing (2) then use a wire
a. General. The fuel injection pumps are used as
brush to clean threads of the packing gland (3).
a priming pump for fuel line and fuel injector (nozzle) of
(6) Check the discharge and suction valves
each cylinder. To remove all air from line and injector,
(7 and 8) for wear or corrosion. Replace a defective
proceed as follows:
valve.
(1) Shut off the starting air valve to engine.
(7) Inspect oil seals (12 and 20) for wear or
(2) Open the fuel oil supply valve to the
deterioration. Replace a defective oil seal.
engine.
e. Assembly.
(3) Turn the ASTERN/AHEAD handwheel (6,
NOTE
Measure the thickness of the head
move clockwise back to START.
gasket (18) tagged at disassembly.
(4) Remove the cover (15, fig. 3-11) from
The new head gasket must be exactly
the injection pump housing, then loosen vent plug (2,
the same thickness.
(1) Assemble fuel transfer pump in reverse
order of disassembly.
KEY to fig. 3-11
(2) Place key on shaft (15), slide drive arm
1. Delivery stop
15. Cover housing
over key, then tighten capscrew (11).
2. Holder
16. Adjusting screw
(3) Install packing in packing gland. Use new
3. Spring
17.
Adjusting nut
packing cut into individual rings with a small end gap.
4. Nut
18.
Adjusting nut
Position the gaps 90 degrees apart to assist in
5. Stud
19.
Adjusting shim
preventing leaks. Tighten packing gland finger tight.
6. Valve
20.
Plug
f. Installation.
7. Gasket
21.
Push rod
(1) Position pump into camshaft housing, so
8. Gasket
22.
Socket
that arm on pump shaft engages drive (10) on camshaft,
9. Plunger
23.
Guide (lower)
then secure with lockwashers and capscrews (fig. 3-9).
10. Pinion
24.
Tappet
(2) Reconnect fuel lines to pump. Open fuel
11. Washer
25.
Spring
oil supply valve to transfer pump (34, table 2-4).
12. Control rack
26.
Barrel
13. Guide (upper)
27.
Setscrew
14. Control lever
28.
Valve seat
3-36
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