SECTION I (Con' t.)
on the charge side of the 0.
The hourmeter (8-Fig.8) is integral with the tacho-
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
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
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.
(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.