TM 5-3805-262-34
3-21. CHECKS AND ADJUSTMENTS AND FLOWMETER TESTS (CONT)
e. Flowmeter Tests (Cont).
TEST NO. 2 - LOADER CIRCUITS AND MAIN RELIEF VALVE (SHEET 4 OF 4)
(23) Hold LIFT ARM control lever in RAISE position and adjust flowmeter PRES-
SURE VALVE control until flowmeter PRESSURE gage indicates 2000 psi. If
necessary, adjust engine speed to 2000 rpm by further depressing acceler-
ator pedal. Record flowmeter FLOW gage reading.
(24) Hold LIFT ARM control lever in LOWER position and adjust flowmeter PRES-
SURE VALVE control until flowmeter PRESSURE gage indicates 2000 psi. If
necessary, adjust engine speed to 2000 rpm by further depressing acceler-
ator pedal. Record flowmeter FLOW gage reading.
(25) Hold CLAM control lever in CLOSE position and adjust flowmeter PRESSURE
VALVE control until flowmeter PRESSURE gage indicates 2000 psi. If neces-
sary, adjust engine speed to 2000 rpm by further depressing accelerator
pedal. Record flowmeter FLOW gage reading.
(26) Hold CLAM control lever in CLOSE position and adjust flowmeter PRESSURE
VALVE control until flowmeter PRESSURE gage indicates 2000 psi. If neces-
sary, adjust engine speed to 2000 rpm by further depressing accelerator
pedal. Record flowmeter FLOW gage reading.
(27) Open flowmeter PRESSURE VALVE control completely, decrease engine speed
to idle, then turn off engine.
(28) If readings recorded in steps (20) and (22) through (26) above for each
circuit is within one gallon per minute of reading obtained at same pres-
sure in test no. 1 step (18), the circuit is good.
(29) If indication for a circuit as recorded in steps (20) and (22) through
(26) above is not within one gallon per minute of reading obtained at
same pressure in test no. 1 step (18) there is leakage in the circuit.
Refer to troubleshooting (page 2-123).
Hydraulic system pressure is over 2000 psi and hydraulic reservoir is
pressurized with compressed air. Before loosening or disconnecting any
hydraulic hoses, lines, or fittings, operate all hydraulic control
levers to relieve hydraulic system pressure. Failure to do so could
cause serious injury or death. If you are injured obtain medical
assistance immediately.
(30) Disconnect flowmeter hoses (6 and 7) and remove fittings (8).
(31) Remove fitting (5).
(32) Reinstall connector (4), coupling (3), and cap (2) in tube.
(33) Reinstall fill cap in hydraulic reservoir and close and lock access door
in front of loader.
(34) Remove flowmeter from loader cab.
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