Looking for Answers about Haldex Hydraulic Pump - 22 GPM, 2-Stage, Model# 1080035?

A two-stage pump is used to rapidly cycle a cylinder until it encounters the load, at which time the pump's output changes from high flow, low pressure to low-flow, high pressure, an effect not unlike shifting to a lower gear when climbing a steep hill in an automobile.

If a device such as a log splitter were designed with a single stage pump and expected to rapidly cycle the cylinder, the prime mover (engine or electric motor) would have has to be sized to the maximum pressure and flow capabilities of a high volume pump, which would result in having to use an unreasonably large engine or motor, driving up the cost and size of the unit.

The two-stage pump allows a lower powered engine or motor to generate high pressure when required but still be able to achieve a more rapid cycle time.

This pump is designed to be directly drive from a motor or engine PTO shaft. Therefore it is a clockwise rotation pump when viewed from the shaft end.

This pump is intended to be mounted in a horizontal position only.

The Haldex Hydraulic Pumps item #1056 can be used horizontally or vertically but in a vertical application the customer must have a cast iron flywheel on their engine and a special mounting bracket that Northern Tool + Equipment does not sell. Also, the item #1057 is only recommended to be used horizontally.

This pump requires a minimum of a 10 HP engine.

This pump requires a 10 hp, direct drive only, horizontal shaft. If your shaft size on the engine is a 1" you could use the couplings listed below. You will also need the insert item number 3009.

The overall length from the end of the shaft to the back of the unit is 9".

The GPM at the second stage is 6.5 @ 2500 PSI.

This Haldex hydraulic pump will not run a hydraulic motor.

This pump needs to run at a maximum of 3600 rpms.