TM 5-3805-260-24Test 1: Maximum Pressure Relief Valve Setting1. Open the manual load valve fully.2. Move the ejector control lever to FORWARD position.When the ejector cylinder is at the end of its stroke,keep the control lever in FORWARD position.3. With the engine at test rpm, slowly close the manualload valve until oil flow through the flow meter stops(0 gpm).NOTE: The test rpm is given on the Procedure DataSheet, CHART A (Page 4-36).4. Write down the pressure.5. The setting for the relief valve for maximumpressure must be according to the ServiceManual.CAUTION: When the pressures are higher than 1000psi, slowly open manual load valve before releasing thecontrol lever. This will prevent possible damage to thepressure gauge.Test 2: System Oil Temperature1. Open the manual load valve fully.2. Move the ejector control lever to FORWARD position.3. Write down the oil temperature. Oil temperature mustbe 150 5 F.Test 3: System Base Flow Rate1. Open the manual load valve fully.2. Move the ejector control lever to the FOR- WARDposition. - When the ejector cylinder is at the end ofits stroke, keep the control lever in FORWARDposition.3. Get the engine to test rpm.4. Check pressure to make sure it is at a minimum valueof approximately 100 psi.5. Write down the flow rate (gpm).The base flow rate of the system will be thesame as the low pressure flow of the hydraulic pump.Because there will be minimum leakage in the controlvalves, lines and cylinder seals at low pressure, the baseflow rate can be used to find the flow differential in Tests4 through 7.Tests 4 through 7: Leakage RatesThese five tests are similar. Each test is doneas follows:1. Move the control lever to the respective OPERATEposition. When the respective cylinder is at the endof its stroke, keep the control lever in position.2. Get the engine to test rpm.3. Make an adjustment to the manual load valve to get1000 psi pressure.4. Then make the system constant with theseconditions.5. Write down the flow rate (gpm) for each test.The flow differential for each test (4 through 7) isfound by:Subtract the flow rate (gpm) for each test fromthe base flow rate (Test 3).The percent of flow loss for each test (4 through7) is found by:Divide the flow differential for each test by thebase flow rate (Test 3) and multiply by 100.Test 9: System Oil Temperature1. Open the manual load valve fully.2. Move the ejector control lever to the FOR-WARDposition.3. Write down the oil temperature.Make a comparison of the oil temperature fromTest 2 and 9. Test 2 must be 150 5F and Test 9 mustbe inside of (within) 10 F of Test 2. For each 10° Fhigher difference, subtract . 5 gallon per pump cartridgefrom the leakage rate. For each 100 F lower difference,add . 5 gallon per pump cartridge to the leakage rate.EQUIPMENT INSTALLATION (Elevator System)Tee locations for the elevator systems aredifferent from the tee location for the ejector and bowlsystems. A supply line tee block A9 and/or adapter mustbe installed in the specified location for correct testresults. See the illustrations and schematics for thespecific machine.4-33
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