TM 5-4930-218-14
OPERATING INSTRUCTIONS
WARNING
If equipment fails cooperate, refer to
troubleshooting procedure in Chapter
Section I. OPERATING PROCEDURES
2-1. General
Before attempting cooperate the lubricating and
This section contains information and guidance
servicing unit, you must become familiar with all
for the personnel responsible for operation of the
controls and instruments provided on the unit. Refer
lubricating and servicing unit, This section gives in-
to table 2-1 for a complete description and iden-
tification of all controls and instruments used on the
structions on starting and stopping the engine and
lubricating and servicing unit. The controls and in-
struments are illustrated in figures 2-1 through 2-6.
basic operations of the unit.
Fig.
Index
Description
No.
No.
1
OIL PRESSURE GAGE. Indicates engine oil pressure. With engine at normal operating temperature, gage must indicate
between 20 and 35 psi.
2
FUEL LEVEL GAGE. Indicates the level of fuel in the tank. F indicates full tank. E indicates empty tank.
3
PANEL LIGHT SWITCH. Controls the operation of panel lights.
4
AIR PRESSURE GAGE. Indicates pressure of air reservoir. Working pressure of air system is between 150 and 175 psi.
5
AMMETER. Indicates the rate of charge or discharge of the battery in amperes. Immediately after you start the engine,
ammeter will show high rate of charge and will then taper off to near zero. Battery charge is replenished after starting.
6
OIL PRESSURE OVERRIDE SWITCH. When pressed and held, this pushbutton closes the starting circuit through the
low oil pressure switch to allow starting during a low oil pressure condition. After starting, you can release switch
when oil pressure gage shows more than 10 psi.
7
CHOKE CONTROL. Controls the operation of the engine choke. Pull out to aid starting of cold engine. When engine
starts and warms up, push in choke control to maintain smooth engine operation, Make sure you have control fully in
when engine is warmed to operating temperature.
8
THROTTLE CONTROL. Controls maximum engine operating speed. When you pull out on the control, engine speed in-
creases. To lock speed setting, turn throttle control clockwise. During operation, engine speed will reduce to idle when
preset air pressure of air system is attained.
9
STARTER SWITCH. Controls cranking of engine. When pressed and held while low oil pressure switch is held, it causes
the starting motor to crank the engine. You must turn ignition switch on to start engine.
CAUTION
Do not crank the engine for more than 30 seconds at a time or you will burn
out the starting motor. Allow a minimum of 2 minutes between cranking at-
tempts to permit starting motor to cool. Notify organizational maintenance
if you cannot start the engine after four or five attempts.
IGNITION SWITCH. Controls starting and stopping of engine by grounding the magneto. When moved to the ON
10
position, switch allows engine to be started. When moved to the OFF position, engine stops.
1
ALCOHOL DISPENSER NEEDLE VALVE. Controls flow of alcohol into air system to prevent freezing during operation
in subfreezing conditions. Normal setting is one-fourth turn counterclockwise from fully closed position.
2
ALCOHOL DISPENSER SIGHT GAGE. Indicates if supply of alcohol is available during operation.
3
ALCOHOL DISPENSER PLUG HANDLE. Facilitates plug removal to fill alcohol dispenser. Turn counterclockwise to
remove.
AIR PLUNGER VALVE. Controls flow of air from air reservoir to air system. Pull out plunger to allow air flow to air
4
system. Push in plunger to stop air flow.
CONDENSATE VALVE. Enables moisture to be drained from air pump motor. One valve is provided on each of three
5
motors. Open valve while air pressure is applied to dispel moisture.
6
CIRCULATING VALVE. Permits lubricants to be circulated through pump and back into lubricant compartment. Open
