Design
The H1 axial piston variable displacement pumps are of cradle swashplate design and are intended for
closed circuit applications.
The flow rate is proportional to the pump input speed and displacement.
The latter is infinitely adjustable between zero and maximum displacement.
Flow direction is reversed by tilting the swashplate to the opposite side of the neutral (zero
displacement) position.
The H1 family of closed circuit variable displacement axial piston pumps is designed for use with all
existing Danfoss hydraulic motors for the control and transfer of hydraulic power. H1 pumps are compact
and high power density where all units utilize an integral electro-hydraulic servo piston assembly that
controls the rate (speed) and direction of the hydraulic flow. H1 pumps are specifically compatible with
the Danfoss family of PLUS+1
™
microcontrollers for easy Plug-and-Perform
™
installation.
H1 pumps can be used together in combination with other Danfoss pumps and motors in the overall
hydraulic system. Danfoss hydrostatic products are designed with many different displacement, pressure
and load-life capabilities. Go to the Danfoss website or applicable product catalog to choose the
components that are right for your complete closed circuit hydraulic system.
Cross section view
Slipper
Piston
Cylinder block
Swashplat e
Shaft
Shaft seal
Electric displacement control
Servo piston
Valve plate
Swashplate feedback pin
Swashplate bearing
P106 337E
Front bearing
Rear bearing
Charge Pump
Service Manual
H1P 045/053/060/068 Axial Piston Single Pumps
Introduction
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©
Danfoss | June 2020
AX152886481964en-000405