4-2
4.2 PRIMING THE FUEL SYSTEM
The engine is equipped with a mechanical fuel lift
pump, 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, the follow-
ing steps are recommended:
1. Turn bleed valve (Red) counter---clockwise until ful-
ly opened.
2. Turn the top of the manual plunger counter-clock-
wise to unlock it. Then rapidly hand pump the hand plung-
er until positive pressure (resistance) is felt, which will in-
dicate fuel flow.
3. Depress and turn the top of the manual plunger
clockwise to lock it in place.
4. Start engine.
5. When engine is running properly, turn bleed valve
clockwise until fully closed.
4.3 ENGINE SERVICE AND COMPONENTS
4.3.1 Cooling System
Air flows through the radiator by using the electric
fans. The radiator, externally and internally must be clean
for adequate cooling. The water pump V-belt must be ad-
justed periodically to provide maximum efficiency. (Refer
to section 4.4.1)
Do the following service to the cooling system
CAUTION
Use only ethylene glycol coolant (with inhibitors)
in system as glycol by itself will damage the
system. Always add pre-mixed 50/50 coolant and
water to radiator/engine. Never exceed more
than 50% concentration of coolant. Use a low
silicate coolant meeting GM specification GM
6038M or equal.
1. Remove all foreign matter from the radiator coil by
reversing the normal air flow. Compressed air or water
may be used as a cleaning agent. It may be necessary to use
warm water mixed with any good commercial detergent.
Rinse with fresh water if a detergent is used.
2. Drain coolant completely by removing lower radia-
tor hose and radiator cap.
3. Install hose and fill system with clean, untreated wa-
ter to which three to five percent of an alkaline base radia-
tor cleaner should be added (6 oz. dry to one gallon)
4. Run engine 6 to 12 hours and drain system while
warm. Rinse system three times after it has cooled down.
Refill system with water.
5. Run engine to operating temperature. Drain system
again and fill with treated water/coolant. (see Caution
Note and refer to section 1.2) NEVER POUR COLD
WATER INTO A HOT ENGINE, however hot water can
always be added to a cold engine.
4.3.2 Lube Oil Filter
After warming up the engine, stop engine, remove
drain plug from the reservoir and drain engine lube oil.
Lightly oil gasket on filter before installing.
CAUTION
When changing oil filter, the new filter should be
primed with clean oil, if the filter is not primed,
the engine may operate for a period with no oil
supplied to the bearings.
Replace filter and add lube oil. (Refer to section 1.4)
Warm up engine and check for leaks.
4.3.3 Servicing the Speed Control Solenoid and Linkage
1
2
3
5
4
1. Solenoid
2. Bolt
3. Solenoid Bracket
4. Linkage (Speed)
5. Clip
Figure 4-1. Speed Control Solenoid
1. Disconnect wiring to solenoid. Disconnect linkage
arm (item 4) from solenoid. Remove mounting hardware
from solenoid and then remove solenoid.
2. Install replacement solenoid and mounting hard-
ware. Do not tighten at this time.
3. Attach linkage to solenoid and install the clip to the
solenoid arm.
4. Hold the speed lever against the high speed stop and
check the rpm (refer to section 1-2) Adjust the low speed
stop screw stop if necessary.
5. Check engine speed. With the engine stopped, place
a mark on the crankshaft sheave (white paint for exam-
ple). Speed may be verified by a Strobette model 964
(strobe tachometer) Carrier Transicold P/N 07-00206.
6. Hold the speed lever against the high speed stop and
check the rpm (refer to section 1-2). Adjust the high speed
stop screw if necessary.
7. Energize the speed solenoid. Push the solenoid so
that the speed arm rests against the high speed stop screw
and tighten the solenoid mounting bolts. Connect wires to
solenoid.
