TM 55-4920-394-13&P
d.
Press FILTER BLEED valve (5) to free system of entrained air.
e.
Observe output pressure gauge (2) for reading of 100 to 500 psig.
f.
Check condition of flow in flowmeter (1). If air is still present, bleed system per preceding step (d).
g.
Adjust VOLUME CONTROL (29) to desired rate of flow.
h.
Slowly close FLOW CONTROL valve (22) to check or reset HIGH PRESSURE RELIEF valve (27)
and/or set COMPENSATOR CONTROL.
CAUTION
Before hydraulic fluid passes through high pressure filter, warm fluid to 80
degrees F minimum by circulating fluid within the test stand. HIGH
PRESSURE RELIEF valve shall be open and FLUID BYPASS VALVE
shall be closed. When the fluid temperature reaches 80 degrees F, flow
fluid through filter at not more than gallon per minute until filter housing
is warmed. At fluid temperatures below 80 degrees F, the high viscosity of
the hydraulic fluid will cause excessive differential pressure which actuates
the differential pressure switch and may rupture the primary filter element.
i.
Reset HIGH PRESSURE RELIEF valve (27) setting to 200/250 psig above desired
COMPENSATOR CONTROL setting.
j.
Adjust COMPENSATOR CONTROL setting to desired value. Readjust flow if necessary.
k.
Shut down test stand and stop motor (para. 2-7).
2-7. Stopping The Test Stand. To stop the test stand:
a.
Reduce volume control setting to minimum.
b.
Open FLUID BYPASS valve (24, fig. 2-1).
c.
Close FLOW CONTROL valve (22).
d.
Position RESERVOIR SELECTOR valve (28) to test stand reservoir.
e.
Push pump motor stop button (18).
f.
Disconnect hoses and place on hose retainer hooks.
Cap all external connections.
Do not
disconnect hoses from test stand, unless necessary.
2-8. Emergency Stop.
a.
Open FLUID BYPASS valve (24).
2-8
