TM 5-3805-262-343-21. CHECKS AND ADJUSTMENTS AND FLOWMETER TESTS (CONT)e. Flowmeter Tests (Cont).TEST NO. 1 - HYDRAULIC PUMP LOADER SECTION (SHEET 4 OF 4)(19) Open PRESSURE VALVE control completely and turn off engine.(20) If flow recorded in step (16) above is less than 52 gallons per minute:(a) There is an air leak or restriction between hydraulic pump and reser-voir; change hydraulic filter, and check hoses, lines, and fittings(refer to TM 5-3805-262-20).(b) Loader section of hydraulic pump is worn or damaged; replace hydraulicpump (page 3-612).(21) If flow recorded in step (16) above is 52 gallons per minute or more,lines between pump and reservoir are okay.(22) If flow recorded in step (18) above is less than that recorded in step(16), it indicates that loader section of hydraulic pump is worn or dam-aged. Determine efficiency of loader section as described below.Divide flow recorded in step (18) above by flow recorded in step (16)above. Example: flow recorded in step (16)=52 gallons per minute; flowrecorded in step (18) above=46 gallons per minute.46/52=.884=88.4 percent efficient.(23) If efficiency as determined above is below 75 percent, replace hydraulicpump (page 3-612).Hydraulic system pressure is over 2000 psi and hydraulic reservoir ispressurized with compressed air. Before loosening or disconnecting anyhydraulic hoses, lines, or fittings, operate all hydraulic controllevers to relieve hydraulic system pressure. Failure to do so couldcause serious injury or death. If you are injured obtain medicalassistance immediately.(24) Remove cap (8) and plug (9) installed in steps (4) and (5) above frominlet hose (3) and tube (2). Connect inlet hose (3) to tube (2) andtighten tube fitting.(25) Reinstall two clamps (7) and secure using two capscrews (6), lock washer(5), and nuts (4).(26) Perform test no. 2 below (page 3-631).3-630
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