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Instruments - Calibration (USATSG) (Contd)
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TM-1-4920-446-13P Hydraulic System Test Stand Type D-8A P/N 7459 Manual
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Frame assembly
TM 1-4920-446-13 & P 3-89    Instruments - Calibration (USATSG) (Contd) 3-89 CALIBRATION - HIGH PRESSURE GAUGE  (Contd) Method II (Alternate) 1. Isolate the gauge from the hydraulic system by closing the HP GAUGE SHUT-OFF valve. 2. Connect a 0-6000 psi calibrated test gauge and hydraulic pressurizing equipment to the HP GAUGE TEST port. 3. Operate the pressurizing equipment and compare the two gauge readings over various points on the scale. 4. The test stand gauge must be replaced if the readings do not conform to the limitations stated in step 4 of Method I above. CALIBRATION - LOW PRESSURE GAUGE (21) 1. Place selector valve in LP GAUGE CALIBRATION position. 2. Connect a 0-300 psi test gauge and hydraulic pressurizing equipment to the LP GAUGE  TEST port. 3. Operate the pressurizing equipment and compare the two gauge readings at various points on the scale. 4. The test stand gauge must be replaced if its readings do not agree with the standard gauge within one percent 24± 1/2 percent of full scale. CALIBRATION - FLUID TEMPERATURE GAUGE 1. The fluid temperature gauge is equipped with a five foot capillary tube and sensing bulb.  Remove the sensing bulb from the thermostat well. 2. Immerse the sensing tube into a water container with a controlled temperature. 3. Check the water temperature with a standard thermometer and compare readings with test stand gauge. 4. Replace the gauge if the temperature readings are inaccurate or erratic. END OF TASK 3-119

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