TM 9-4910-726-14&P
PORTABLE HYDRAULIC TESTER
HYDRAULIC POWER
WITH THE TESTER, MOTORS, VALVES, CYLINDERS
AND OTHER HYDRAULIC EQUIPMENT CAN BE
FLOW AND PRESSURE EQUALS HYDRAULIC
CHECKED AT RATED FLOWS AND PRESSURES.
POWER. THE PUMP AND-OR MOTOR PRODUCES
SOTH LOW AND PRESSURE.
THE TESTER MEASURES OIL FLOW, (GPM)
A HYDRAULIC SYSTEM ACCOMPLISHES WORK
GALLONS PER MINUTE, PRESSURE (PSI) AND
WHEN SEALS ARE GOOD, COMPONENTS ARE NOT
TEMPERATURE (F) DEGREES FAHRENHEIT.
WORN, TOLERANCES ARE AS SPECIFIED, WHEN
THE RELIEF VALVES ARE OPERATING PROPERLY
OIL LEAKAGE IN HYDRAULIC MOTORS, VALVES,
AND WHEN THE EQUIPMENT IS BEING OPERATED
CYLINDERS RESULT IN A LOSS OF FLOW AND
WITHIN DESIGN CAPABILITY.
SOMETIMES A LOSS OF PRESSURE.
INTERNAL WEAR IN A PUMP PERMITS SLIPPAGE
OR BYPASSING OF THE OIL BY THE GEARS, VANES
WITH A KNOWLEDGE OF A HYDRAULIC SYSTEM TO
OR PISTONS AND RESULTS IN THE INABILITY OF
BE TESTED AND APPROPRIATE USE OF THE
THE PUMP (UNDER PRESSURE) TO DELIVER THE
TESTER,
MOST
AREAS
OF
HYDRAULIC
RATED VOLUME OF OIL.
MALFUNCTION CAN BE PINPOINTED WITHOUT
DISMANTLING OR TEARING DOWN THE SYSTEM.
WHEN FLOW AND OR PRESSURE IS REDUCED,
HYDRAULIC POWER IS REDUCED.
THE LOADING VALVE PERMITS SIMULATION OF
HYDRAULIC
PUMPS
AND
SYSTEMS
ARE
LOAD OR WORK.
PROTECTED AGAINST EXCESSIVE PRESSURE BY
RELIEIF VALVE
CAUTION:
AN IMPROPER RELIEF VALVE SETTING EITHER
LOAD VALVE LEVER IS CAPABLE
ENDANGERS THE SYSTEM WITH TOO MUCH
OF VERY HIGH PRESSURES
PRESSURE OR PERMITS RELIEF OF PRESSURE
PRIOR TO DEVELOPING THE MAXIMUM SPECIFIED
PRESSURE OF THE SYSTEM.
A. KEEP LOAD PRESSURE WITHIN THE TESTER
AND SYSTEM RATING.
CYLINDERS AND VALVES FUNCTION WHEN FLOW
AND PRESSURE IS RECEIVED. LEAKAGE IN THE
B. DO NOT EXCEED DESIGN PRESSURE OF THE
CONTROL VALVE REDUCES WORKING FLOWS AND
SYSTEM UNDER TEST.
PRESSURE DELIVERED DOWN STREAM OF THE
VALVE.
C. WHEN
A
HIGH
PRESSURE
LINE
IS
INCORRECTLY CONNECTED TO THE EXIT PORT
(LOW PRESSURE RETURN SIDE) OF THE
TESTER, BACK PRESSURE OCCURS.
THE
PROTECTIVE BLOWOUT PLUG RELEASES OIL
IN THE TESTER CASE WHEN THE BACK
PRESSURE
REACHES
3000-3500
PSI.
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