28 GPM DYNAMIC 2-STAGE PUMP

item number: 9-7971 PRICE: $231.95 31 In Stock

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28 GPM DYNAMIC 2-STAGE PUMP
Item Number: 9-7971
Price: $231.95
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* UPS 3-Day, 2-Day, and Next Day orders entered before 1pm (CST) Mon-Fri will be shipped the same day. Orders entered Sat or Sun will be shipped the following Monday.
  • This item is on page 44 of our current catalog
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.

SPECIFICATIONS
  • Displacement:
      0.465 cu. in. / rev. HI press. stage
      1.860 cu. in. / rev. LO press. stage
  • Pump Type Gear
  • Rotation CW
  • 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 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).

Q: are these 2 stage pumps adjustable?

A: They are but that is not recommended and it voids the warranty

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28 GPM DYNAMIC 2-STAGE PUMP
Item Number: 9-7971
Price: $231.95
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28 GPM DYNAMIC 2-STAGE PUMP
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