PVWC Hydrostatic Pumps

PVWC Hydrostatic Pump Features Control Selection –Mechanical Pintle w/o neutral by-pass (M-N)

PVWC Hydrostatic Pump Features Control Selection –Mechanical Pintle w/o neutral by-pass (M-N) –Mechanical Pintle w/ neutral by-pass (M-S)

PVWC Hydrostatic Pump Features Control Selection –Mechanical Pintle w/o neutral by-pass (M-N) –Mechanical Pintle w/ neutral by-pass (M-S) –Mechanical Pintle self centering(C-A)

PVWC Hydrostatic Pump Features Control Selection –Mechanical Pintle w/o neutral by-pass (M-N) –Mechanical Pintle w/ neutral by-pass (M-S) –Mechanical Pintle self centering(C-A) –Electrohydraulic Servo w/ feedback (V-M)

PVWC Hydrostatic Pump Features Hydrodynamic Cylinder Barrel Bearing –Allows for a more compact design

PVWC Hydrostatic Pump Features Hydrodynamic Cylinder Barrel Bearing –Allows for a more compact design –Minimizes the need for a heavy driveshaft

PVWC Hydrostatic Pump Features Hydrodynamic Cylinder Barrel Bearing –Allows for a more compact design –Minimizes the need for a heavy driveshaft –Eliminates the need for a tailshaft roller or needle bearing

PVWC Hydrostatic Pump Features Hydrodynamic Cylinder Barrel Bearing –Allows for a more compact design –Minimizes the need for a heavy driveshaft –Eliminates the need for a tailshaft roller or needle bearing –Provides Infinite Bearing Life

PVWC Hydrostatic Pump Features Hydrodynamic Cylinder Barrel Bearing –Allows for a more compact design –Minimizes the need for a heavy driveshaft –Eliminates the need for a tailshaft roller or needle bearing –Provides Infinite Bearing Life –Allows Operation on Special Fluids

Hydrodynamic Bearing

PVWC Hydrostatic Pump Features “Hard on Hard” Running Surfaces –Contamination Resistant Rc (file hard)

PVWC Hydrostatic Pump Features “Hard on Hard” Running Surfaces –Greater Contamination Resistance Rc (file hard) –Allows for Operation on Special Fluids

PVWC Hydrostatic Pump Features “Hard on Hard” Running Surfaces –Greater Contamination Resistance Rc (file hard) –Allows for Operation on Special Fluids –Provides Longer Life

PVWC Hydrostatic Pump Features Optional Built-in Supercharge/Implement Pump –Replenishes the Closed Loop Circuit

PVWC Hydrostatic Pump Features Optional Built-in Supercharge/Implement Pump –Replenishes the Closed Loop Circuit –Allows for Operation of Auxiliary Circuits up to 63 bar (1000 psi). Consult your Area Manager for higher or lower Implement relief valve settings)

Optional Supercharge/Auxiliary Pump

PVWC Hydrostatic Pump Features Thru Shaft Design –Allows for Multiple Pump Installation

PVWC Hydrostatic Pump Features Thru Shaft Design –Allows for Multiple Pump Installation –Plug-in Coupling for Fast Easy Installation of a Second Hydrostatic or Auxiliary Pump

PVWC Hydrostatic Pump Features Thru Shaft Design –Allows for Multiple Pump Installation –Plug-in Coupling for Fast Easy Installation of a Second Hydrostatic or Auxiliary Pump –Close Coupled Mount Eliminates the need for an external adapter

PVWC Hydrostatic Pump Features Three Displacements in Two Frame Sizes –011 ml/rev (.66 in³/rev) SAE “A” or “B”

PVWC Hydrostatic Pump Features Three Displacements in Two Frame Sizes –011 ml/rev (.66 in³/rev) SAE “A” or “B” –014 ml/rev (.86 in³/rev) SAE “A” or “B”

PVWC Hydrostatic Pump Features Three Displacements in Two Frame Sizes –011 ml/rev (.66 in³/rev) SAE “A” or “B” –014 ml/rev (.86 in³/rev) SAE “A” or “B” –022 ml/rev (1.35 in³/rev) SAE “A” or “B”

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces Provides More Fluid Retention on the Shoe Face

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces Provides More Fluid Retention on the Shoe Face –Hard on Hard Technology

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces Provides More Fluid Retention on the Shoe Face –Hard on Hard Technology High Degree of Contamination Resistance

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces Provides More Fluid Retention on the Shoe Face –Hard on Hard Technology High Degree of Contamination Resistance –Allows Higher Pressure Operation (up to 5000 psi)

PVWC Hydrostatic Pump Features Hardened Steel Piston Shoes –Specially Treated Shoe Faces Provides More Fluid Retention on the Shoe Face –Hard on Hard Technology High Degree of Contamination Resistance –Allows Higher Pressure Operation (up to 5000 psi) –Provides Longer Life

PVWC Hydrostatic Pump Features Special Polymerous Swashblock Bearings –Permits consistent control reaction

PVWC Hydrostatic Pump Features Special Polymerous Swashblock Bearings –Permits consistent control reaction –Eliminates troublesome yolk bearings

PVWC Hydrostatic Pump Features Special Polymerous Swashblock Bearings –Permits consistent control reaction –Eliminates troublesome yolk bearings –Provides longer life

PVWC Hydrostatic Pump Features Special Polymerous Swashblock Bearings –Permits consistent control reaction –Eliminates troublesome yolk bearings –Provides longer life –Allows for operation on special fluids

PVWC Hydrostatic Pump Features Integral “A and B” Port High Pressure Relief Valves/Supercharge Check Valves –Automatically provides replenishing fluid to the low pressure side of the closed loop

PVWC Hydrostatic Pump Features Integral “A and B” Port High Pressure Relief Valves/Supercharge Check Valves –Automatically provides replenishing fluid to the low pressure side of the closed loop –Protects the circuit from over pressurization

PVWC Hydrostatic Pump Features Integral “A and B” Port High Pressure Relief Valves/Supercharge Check Valves –Automatically provides replenishing fluid to the low pressure side of the closed loop –Protects the circuit from over pressurization –Provides cushioned hydrodynamic or regenerative braking of the closed loop hydraulic circuit

PVWC HPRV Circuit “A” Port HPRV/SCCV “B” Port HPRV/SCCV SCRV

PVWC Hydrostatic Pump Features Optional Implement Relief Valve –Protects the implement or auxiliary circuit and supercharge pump from over pressurization damage

PVWC Implement Circuit 63 bar Implement RV To CircuitFrom Circuit

PVWC Hydrostatic Pump Features Built-in Supercharge Relief Valve –Maintains the correct back pressure in the supercharge circuit, to replenish the pressure side of the closed loop

PVWC Hydrostatic Pump Features Built-in Supercharge Relief Valve –Maintains the correct back pressure in the supercharge circuit, to replenish the pressure side of the closed loop –Allows excess supercharge and return fluid a return path to the reservoir

PVWC Supercharge Circuit Supercharge Relief Valve B Port A Port Supercharge Relief A Port B Port

PVWC Hydrostatic Specifications

PVWC Hydrostatic Supercharge Pump Specifications

PVWC HPRV Circuit A Port HPRV B Port SCCV SCRV

PVWC Implement Circuit 63 bar Implement RV To CircuitFrom Circuit

PVWC Do’s and Don’ts The Do’s List – Check Alignment (.005 TIR) – Fill the pump case! –Verify shaft rotation.

PVWC Do’s and Don’ts The Don’t List or the “If it breaks, you bought it list.” –Do not restrict the case drain line. No filters (if one is used make sure it is sized for peak case flows and install a 5 psi check valve in parallel.)

PVWC Do’s and Don’ts Case Restriction cont. –No in-line (Hedland style) flow meters, they tend to be quite restrictive, the flow path through the meter is only a ½” inch diameter hole. If using one please, install a ball valve in parallel with the meter. Keep the ball valve open when you are not monitoring case flow.

PVWC Do’s and Don’ts Case Restrictions cont. – No heat exchangers. –What does a heat exchanger need to operate properly?

PVWC Do’s and Don’ts Case Restrictions cont. – No heat exchangers. What does a heat exchanger need to operate properly. Answer: Turbulent Flow or pressure drop. Turbulent flow scrubs cold oil off the tubes and mixes it with hot oil, thus creating cooler oil.

PVWC Do’s and Don’ts Case Restriction cont. – No other return or drain lines.

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