28 GPM 2 STAGE HYD PUMP Brand new, DYNAMIC two stage HI/LO pressure hydraulic gear pump. Ideal for applications such as log splitters, presses and other equipment where rapid movement of the cylinder at low pressure is required prior to automatically switching to the high pressure mode to meet load requirements. The change from LO to HI pressure is automatic with the LO stage pressure preset from 400-900 PSI. Minimum of 16 HP required for gas engine use.
Displacement: 0.465 cu. in. / rev. HI press. stage 1.860 cu. in. / rev. LO press. stage
Pump Type Gear
Pressure: 3000 PSI max.
Speed: 3600 RPM max.
Flow: 7 GPM HI press. stage 28 GPM LO press. stage
Unloading Pressure 400-900 PSI
Mount 2 bolt SAE A
Shaft 5/8" dia. x 1-1/2" long keyed
Rqd. Filtration 25 micron
Inlet Port 1" NPT
Outlet Port 3/4" NPT
Size 6-9/16" x 6-1/4" x 4-5/8"
Shpg. 23 lbs.
Showing Questions 1-5 of 6
Q: What size are the fittings on the 28 gpm log splitter pump 9-7971. Suction and pressure.
A: Inlet is 1" NPT and outlet is 3/4" NPT
Q: Can this pump be used on a vertical shaft engine
A: Yes it can be mounted vertically. Must be supported properly.
Q: I would like to run this pump at 1750 rpm with a 5HP electric motor. Do you see any problems?
A: That would be adequate. Keep in mind that the flow rates for each stage would be half what are listed.
Q: My measurements for the pump need to be Shaft- 5/8 Inlet- 3/4 Outlet- 1/2 Will this still work?
A: This pump has the 5/8 shaft but the ports are larger 1" NPT inlet and 3/4" NPT outlet. Due to the oilflow the pump delivers these are the port sizes required.
Q: Can the rotation of the pump be changed to CCW?
A: No they are only built in a CW rotation. This is designed to be direct coupled to the crankshaft of a small gas engine (16 HP).