4---2
4.2 PRIMING THE FUEL SYSTEM
The unit is equipped with a mechanical fuel lift pump
(Also, refer to paragraph 4.3.5), it is mounted on the
engine next to the injection pump. This pump has a
manual plunger for bleeding fuel when the fuel tank has
been run dry.
Since the unit employs a closed fuel circuit, it is
recommended to use the following steps:
1. Turn bleed valve (Red) counter---clockwise until
fully opened (see Figure 1---5).
2. Turn the top of the manual plunger counter---
clockwise to unlock it. (see Figure 4---3) Then, rapidly
hand pump the manual plunger until a positive pressure
(resistance) is felt, which will indicate fuel flow.
3. Depress and turn the top of the manual plunger
clockwise to lock in place.
4. Start engine. (refer to section 2.3.)
5. When engine is running properly, turn bleed valve
clockwise until fully closed.
4.3 ENGINE SERVICE AND COMPONENTS
4.3.1Cooling System
The radiator, externally and internally, must be clean
for adequate cooling. The fan belt must be adjusted
periodically to provide maximum air flow. (Refer to
paragraph 4.5)
Do the following to service the cooling system:
a. Remove all foreign material from the radiator coil
by reversing the normal air flow (Force air in thru the
front of the radiator and discharge thru the radiator
toward the engine.) Compressed air or water may be
used as a cleaning agent. It may be necessary to use warm
water mixed with any good commercial dishwasher
detergent. Rinse coil(s) with fresh water if a detergent is
used.
b. Drain coolant completely by opening drain---cock
and removing radiator cap.
CAUTION
Use only ethylene glycol, anti---freeze (with
inhibitants) in system as glycol by itself will
damage the cooling system.
Always add pre---mixed 50/50 anti---freeze and
water to radiator/engine. Never exceed more
than a 50% concentration of anti---freeze. Use a
low
silicate
anti---freeze
meeting
GM
specifications GM 6038M or equal.
c. Close drain---cock and fill system with clean,
untreated water to which three to five percent of an
akalined based radiator cleaner should be added; six
ounces --- dry = 151 grams to one gallon (3.8 litre) of
water.
d. Run engine 6 to 12 hours and drain system while
warm. Rinse system three times after it has cooled down.
Refill system with water.
e. Run engine to operating temperature. Drain
system again and fill with treated water/anti---freeze.
(See Caution note and refer to paragraph 1.3.c.)
NEVER
POUR COLD WATER INTO A HOT ENGINE,
however
hot water can always be added to a cold engine.
4.3.2Lube Oil Filters
The full flow filter is located near the run solenoid as
shown in Figure 1---1.
After warming up the engine, stop engine, remove
drain plug from oil reservoir and drain engine lube oil.
Lightly oil gasket on filter before installing.
Replace filters and add lube oil. (Refer to paragraph
1.4.j.) Warm up engine and check for leaks.
4.3.3Servicing the Fuel Solenoid and Linkage
NOTE
Periodically grease (P/N 07---00245---00) Fuel
Solenoid plunger.
1. Remove spring linkage from injection pump run
lever (item 3, Figure 4---1).
1
2
3
4
5
6
RUN
CONTROL
LEVER
2.47
(6.27cm)
(8.18cm)
3.22
ENERGIZED
DE--ENERGIZED
1. Solenoid
4. Clip
2. Solenoid bracket
5. Linkage rod
3. Spring
6. Boot
Figure 4---1. Fuel Solenoid Assembly
2. Disconnect wiring to solenoid. Remove clip (item
4) from linkage rod (item 5). Remove mounting hardware
from solenoid and then remove solenoid.
3. Install new solenoid and mounting hardware,
connect wiring. Place ignition (Start---Run---Off) switch
in the START position to energize solenoid. Check
energized dimension as shown in Figure 4---1. Turn
switch OFF. Check de---energized dimension. If ener-
gized dimension needs adjusting, loosen solenoid mount-
ing bolts and move solenoid.
4. Energize solenoid and check clearance.
5. If the engine does not shut off when the fuel
solenoid is de---energized, loosen the four (4) mounting
bolts and move the solenoid toward the lever until it shuts
off. Tighten the mounting bolts.
