Figure 2-4. Fuel tank and related parts.

Table 2-1-Continued

Fig. &

index No.

Name

Operation and use

2-2

Suction gage

Compound gage indicates either vacuum or pressure condition at suction port when

suction gage valve is open. Indication depends upon specific operating conditions.

2-2

Tachometer-

Indicates the engine speed in hundreds of rpms. Normal governed speed rating

hourmeter

is 2450 rpm. Engine speed at full load should not go beyond this level. Hour-meter

indicates engine running time based on operating speed (engine revolutions x 100,

000).

2-2

Discharge pres-

Indicates pump discharge pressure when discharge pressure gage valve is open.

sure gage

High pressure indicates high discharge head or discharge line restriction. Normal

discharge pressure varies with operating conditions.

2-2

Starter push-

When the battery disconnect switch and ignition switch are ON, the starter button

pushbutton, when pressed, energizes the engine starter to turn over the engine for

starting. Safety bypass switch (15) must be held closed during starting to bypass oil

pressure safety switch.

2-2

Battery discon-

In the ON position, it closes circuits to the starting system and ignition switch.

nect switch

In the OFF position, it interrupts these circuits.

2-2

Ignition switch

In the ON position, it energizes the oil pressure and water temperature gage circuits and

removes the ground from the ignition circuit to permit engine ignition. Battery

disconnect switch must be in ON position to make this switch operative. When moved

to OFF, ignition switch stops the engine by grounding the magneto, regardless of the

position of battery disconnect switch.

2-2

Low oil pressure

When pressed, it resets the low oil pressure safety circuit to allow engine starting.

reset

2-3

Air eliminator

When open, the air eliminator valve releases air in the discharge piping. Normally

valve

closed during operation after starting.

2-3

Air cleaner re-

Indicates red when air cleaner is clogged, preventing free air passage. Requires

striction

reset after air cleaner service.

indicator

2-3

Engine primer

When operated, it pumps raw fuel into the intake manifold to facilitate starting.

pump

2-3

Suction gage

When open, the suction gage valve applies suction port pressure to suction gage.

valve

2-3

Discharge pres-

When open, the discharge pressure gage valve applies discharge pressure to discharge

sure gage valve

pressure gage.

2-4

3-way fuel source

This valve has three positions as follows:

selector valve

OFF position shuts off fuel supply to engine.

TANK position opens tank-to-engine fuel supply line.

AUX position opens the line between the auxiliary fuel supply and engine.

2-4

Fuel tank gage

Indicates level of fuel in fuel tank

1. Fuel source selector

3. Fuel tank filler cap

valve

4. Autofill connector

2. Fuel tank level gage

5. Auxiliary fuel line

connector

Figure 2-4. Fuel tank and related parts.

2-5