Hourmeter

SECTION I (Con' t.)

on the charge side of the 0.

The hourmeter (8-Fig.8) is integral with the tacho-

1-25 Hourmeter.

meter which is mounted on the test stand control panel, it is an

electrically driven, direct-reading indicator with six numbered

wheels, which record engine operating time in hours and tenths of

hours. The time recorded is a guide for making operating checks,

periodic inspections, and filter cartridge replacements.

The 1/2 in. and 3/4 in. flow control

1-26 Flow Control Valves.

valves (23 & 24 Fig.8), located on the lower right of the test

stand control panel, control the flow of hydraulic fluid from the

In addition to the valve handles, locking

hydraulic test stand.

devices are provided to secure the valves in their closed or open

position.

The fluid volume control (3-Fig.3),

1-27 Fluid Volume Control.

located on the rear bulkhead, is reached through the rear access door.

This control positions the cam plate of the pump to obtain the

desired volume output.

The adjusted output is indicated by the fluid

flow indicator.

The fluid flow indicator (14-Fig.8),

1-28 Fluid Flow Indicator.

mounted on the test stand control panel, indicates hydraulic pump

delivery. The indicator dial is graduated in 1 gallon increments

from 0 to 10 gallons per minute.

1-29 High Pressure Relief Valve. The high pressure relief valve

(22-Fig8), located in the lower center of the test stand control panel,

is an adjustable, bypass-type relief valve within operating range

This valve serves as a safety device, protect-

from 400 to 5000 psi.

ing the hydraulic system under test from excessive pressure. A

knurled locknut is provided, to secure the valve In adjustment.

-24-