HIGH PRESSURE PUMP.

TM 55-4920-335-14

Gasoline Engine

Low Pressure Filter

High Pressure Pump

Control Panel

Engine Oil Filter

Pump Volume Control

10.

Battery

High Pressure Filter

11.

Air Cleaner

Pump Compensator Control

12.

Hand Book Compartment

Figure 1-3. Test Stand - Left Side

Engine speed is held automatically at the selected rpm by a

1-11. HIGH PRESSURE PUMP. The high pressure pump (8,

centrifugal flyball governor which adjusts the throttle to

figure 1-3) is bracket mounted to the rear of the engine and

compensate for changes in engine load. A 12 volt battery (10,

driven by it through a flexible coupling. The pump incorporates

figure 1-3) is employed to power the starting system. The

the following features : a fluid volume control (4, figure 1-3)

engine may also be started by a hand crank.

providing regulation of pump delivery from 0 to 10 gpm at

operating pressures ranging from 800 to 5000 psi; an

a. Air Cleaner. The engine air cleaner (11, figure 1-3)

adjustable pressure compensator (6, figure 1-3) which, at a

filters the air entering the carburetor, prolonging the life of the

predetermined pressure, reduces pump delivery to the

engine. The air cleaner is equipped with a pre-cleaner at the

minimum requirement to maintain pressure in the system, and

top.

a compensator shut-off valve which permits isolating the

compensator from the system when adjusting the high

b. Engine Oil Filter. The engine oil filter (9, figure 1-3) is

pressure relief valve.

a disposable cartridge type unit built to MIL-E-11275

specifications.

1-12. CONTROL PANEL. The control panel (3, figure 1-3)

contains all switches, gages, fault indicators, and controls used

c. Muffler. A muffler (2, figure 1-3) is provided at the top

in the operation of the Test Stand.

of the engine for noise and exhaust control.

1-5