TM 55-4920-384-13&P
x. Low Pressure Relief Valve. The low pres-
t. Filter Pressure Gage. The filter pressure
sure relief valve, located between the low pressure
gage (1, Fig. 1-9) mounted on the instrument con-
filter inlet and the reservoir, protects the pump
trol panel, is a needle-indicating, direct-reading
from excessive return pressure.
pressure and vacuum actuated, compund-type gage.
When used in conjunction with the pressure selec-
tor valve, the filter pressure gage indicates pressure
Lights. A low pressure filter warning light (3, Fig.
1-9) and a hi pressure filter warning light (4, Fig. 1-
indicated pressure drop of 20 psi necessitates re-
9) are provided to indicate requirement for filter
placement of the low pressure filter element.
change when actuated by their respective differ-
ential pressure switches. A "Pressure to Test" func-
u. Filter Pressure Select Valve. The pressure
tion is provided to test circuit condition.
selector valve (12, Fig. 1-9) located directly below
the filter pressure gage, is a two-way plug type
valve utilized to switch the filter pressure gage con-
z. Fuel Level Gage. A fuel quantity level gage
(8, Fig. 1-9) in conjunction with a transmitter pro-
nection from the inlet to the outlet side of the low
vides an indication of available reservoir fuel.
pressure filter, thereby determining the condition
of the filter element.
aa. Fuse. An
accessory fuse (25, Fig. 1-9) is
pro-
vialed to reenergize the electrical system in the
v. Return Selector Valve. The return selector
valve (20, Fig. 1-9) mounted on the control panel, is
event short circuit occurs and is corrected.
a 4-way plug-type valve, providing a means of se-
lecting return through the reservoir or return, by-
ab. Engine Compartment. Engine compart-
ment showing location of components not shown in
passing the reservoir.
w. Fluid Temperature Gage. The fluid tem-
perature gage (2) located at the top of the instru-
ac. Accessory Side View. Accessory Side View
ment control panel, is a needle-indicating direct-
of test stand showing location of Battery, Air-
reading, temperature gage graduated from -40 to
cleaner and hydraulic pump (Fig. 1- 11).
200 degrees F. in increments of 2 degrees, from 100
ad. Electrical Schematic. Showing relation of
to 200 degrees range. The gage indicates the tem-
perature of the circulating fluid. During operation
magneto to ignition to alternator to battery (Fig. 1-
the indicated fluid temperature should never exceed
12).
160 F.
1-14