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Webtec Products Limited
Simplified
Digital Hydraulic Testers
DHC 51 - 151
DHT 401 - 751 - 751 HP
www.webtec.co.uk
www.oilsolutions.com.au
Страница 1: ...Simplified Digital Hydraulic Testers Operating Manual Webtec Products Limited Simplified Digital Hydraulic Testers DHC 51 151 DHT 401 751 751 HP www webtec co uk www oilsolutions com au...
Страница 2: ...hen the tester block is used for reverse flow tests slightly lower accuracies may be obtained depending on the oil viscosity density and compressibility 3 The tester should be connected to the hydraul...
Страница 3: ...tion filter 3 0 4 1 b Restricted suction line Low flow under no load c Air leak in pump suction line fittings shaft seals etc d Pump speed too high Decreasing performance Internal leakage in as pressu...
Страница 4: ...gital display The preset units are displayed in either USGPM IGPM or LPM and the selection is indicated by a cursor arrow When the flow rate falls below the minimum allowable L is indicated on the dis...
Страница 5: ...DIRECTIONAL INTERNAL SAFETY DISC WEBSTER HYDRATEST DHT ON OFF OPEN LOADING VALVE BEFORE STARTING MACHINE PP3 64F22 6AM6 A1604 BATTERY INTERNAL SAFETY DISC TEMPERATURE FLOW o LPM C oF US IMP GPM F GPM...
Страница 6: ...EST UNIT 1 1 Connect the Tester to the circuit see page 22 for Port Sizes The inlet and outlet ports are marked on the turbine block Use hoses and fittings of sufficient diameter for the flow being te...
Страница 7: ...on 3 4 Pump flow at rated pressure can now be checked against the pump manufacturer s specifications The decrease in flow from the minimum pressure to maximum pressure determines the pump condition Ty...
Страница 8: ...to end of stroke 4 22 Close the Tester loading valve while watching pressure and flow meter reading Pressure will increase until relief valve opens at which point flow reading will return to zero Note...
Страница 9: ...tester loading valve and record both pressure and flow 4 43 If the SAME decrease in flow is noted as in test per paragraph 4 332 then the control valve is at fault HOWEVER if the flow readings are no...
Страница 10: ...the outlet port of the motor without first checking the allowable back pressure with the manufacturer Motor Leakage 5 22 Measure hydraulic motor r p m with tachometer when motor is working at normal...
Страница 11: ...10 Pump Cylinder Motor Directional Valve Relief Valve Test Hose Relief Valve Drawing B2...
Страница 12: ...essure Port 201 mm 54 mm 200 mm 167 mm Inlet Outlet 1 1 2 4 Bolt SAE Flange Type Ports 44 5 mm 133 4 mm 270 mm 1 4 Pressure Port 200 mm 192 mm Inlet Outlet 1 1 2 4 Bolt SAE Flange Type Port 226 mm Mod...
Страница 13: ...Safety Disc Cartridge 106 mm 16 mm Inlet Outlet Port Adjustable Gauge Cutout Pressure Gauge 50 mm 121 mm Pressure Loading Valve ON OFF TEMPERATURE FLOW o LPM C o F US IMP GPM F GPM a s t OPEN LOADING...
Страница 14: ...r DHC 51 151 Testers only 64 mm Inlet Outlet Ports See Specification 108 mm 50 mm 121 mm HV100 Pressure Loading Valve Safety Disc Cartridge Inlet Output Port 106 mm 16 mm FT1475 40 Gauge Cut out Valve...
Страница 15: ...solvent Turbine should revolve freely when blown along flow straightener D Ensure the turbine block is also free of debris Replace the turbine assembly ensuring the clipped corner of the flow straight...
Страница 16: ...oading valve becomes inoperative and the oil flows freely downstream To replace the discs remove the cartridge assembly by unscrewing the 1 3 8 AF hexagon Unscrew internal holder in cartridge remove t...
Страница 17: ...rnally at approximately 7 bar 100psi over the maximum pressure When the discs fail the loading valve becomes inoperative and the oil flows freely downstream To replace the safety discs remove the load...
Страница 18: ...ed to rupture internally at approximately 100 psi 7 bar over the maximum pressure When the discs fail the loading valve becomes inoperative and the oil flows freely downstream To replace the safety di...
Страница 19: ...to 420 bar 6 000 psi Specification Pressure Gauge 0 420 bar 0 6000 psi 1 12 BSPF PARALLEL 1 1 2 SAE type four bolt flange Solid 350 bar 5000 psi Split 200 bar 3000 psi 1 7 8 UNF Models Working Pressu...
