PVWC Hydrostatic Pumps. PVWC Hydrostatic Pump Features Control Selection Mechanical Pintle w/o...

PVWC Hydrostatic Pumps

PVWC Hydrostatic Pump Features

• Control Selection– Mechanical Pintle w/o neutral by-pass (M-N)


• Control Selection– Mechanical Pintle w/o neutral by-pass (M-N)– Mechanical Pintle w/ neutral by-pass (M-S)


• 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)


• 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)


• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design


• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design– Minimizes the need for a heavy driveshaft


• 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



needle bearing– Provides Infinite Bearing Life



needle bearing– Provides Infinite Bearing Life– Allows Operation on Special Fluids

Hydrodynamic Bearing


• “Hard on Hard” Running Surfaces– Contamination Resistant

• Rc 60-65 (file hard)


• “Hard on Hard” Running Surfaces– Greater Contamination Resistance

• Rc 60-65 (file hard)– Allows for Operation on Special Fluids


• “Hard on Hard” Running Surfaces– Greater Contamination Resistance

• Rc 60-65 (file hard)– Allows for Operation on Special Fluids– Provides Longer Life


• Optional Built-in Supercharge/Implement Pump– Replenishes the Closed Loop Circuit


• 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


• Thru Shaft Design– Allows for Multiple Pump Installation


• Thru Shaft Design– Allows for Multiple Pump Installation– Plug-in Coupling for Fast Easy Installation of a

Second Hydrostatic or Auxiliary Pump


• 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


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


• 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”


• 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”


• Hardened Steel Piston Shoes– Specially Treated Shoe Faces



• Provides More Fluid Retention on the Shoe Face



• Provides More Fluid Retention on the Shoe Face– Hard on Hard Technology




• High Degree of Contamination Resistance




• High Degree of Contamination Resistance– Allows Higher Pressure Operation (up to 5000 psi)




• High Degree of Contamination Resistance– Allows Higher Pressure Operation (up to 5000 psi)

– Provides Longer Life


• Special Polymerous Swashblock Bearings– Permits consistent control reaction


• Special Polymerous Swashblock Bearings– Permits consistent control reaction– Eliminates troublesome yolk bearings


• Special Polymerous Swashblock Bearings– Permits consistent control reaction– Eliminates troublesome yolk bearings– Provides longer life


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


• 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



the low pressure side of the closed loop– Protects the circuit from over pressurization



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


• Optional Implement Relief Valve– Protects the implement or auxiliary circuit and

supercharge pump from over pressurization damage

PVWC Implement Circuit63 bar Implement RV

To Circuit From Circuit


• Built-in Supercharge Relief Valve– Maintains the correct back pressure in the

supercharge circuit, to replenish the pressure side of the closed loop


• 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 CircuitA Port HPRV

B Port SCCV SCRV

PVWC Implement Circuit63 bar Implement RV

To Circuit From Circuit

PVWC Do’s and Don’ts

• The Do’s List– Check Alignment (.005 TIR)

– Fill the pump case!– Verify shaft rotation.


• 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.)


• 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.


• Case Restrictions cont.– No heat exchangers. –What does a heat exchanger need to

operate properly?


• 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.


• Case Restriction cont.– No other return or drain lines.

Thank you for buying Oilgear Products

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PVWC Hydrostatic Pumps. PVWC Hydrostatic Pump Features Control Selection Mechanical Pintle w/o...

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