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Concentric Hydraulic Pump, 11 GPM, 2-Stage, Model# 1001689

Item# 1012
Top Seller
Concentric Hydraulic Pump, 11 GPM, 2-Stage, Model# 1001689

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Concentric Hydraulic Pump, 11 GPM, 2-Stage, Model# 1001689

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$249.99

  • Shipping: 

    Backordered: Order now to reserve yours -
    Estimated to ship 08/26/26

  • Store Pickup: 

    Out of stock at Fredericksburg VA

  • Cast iron bodies handle demanding jobs
  • Durable hardened steel gears
  • Needle bearing construction
  • 1st Stage: 11 GPM@650 PSI
  • 2nd Stage: 2.9 GPM@2,500 PSI

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  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Accessories

  • Warranty

  • Compare

Product Summary

The Concentric 2-stage hydraulic pump can give you faster cycle times and higher possible pressure with a small engine. With superior volumetric and mechanical efficiency, it is excellent for use on log splitters. It operates in a clockwise rotation at 85% efficiency.

What's Included

    (1) Pump

Downloads

Product Manual
Play Item Video

Features + Benefits

  • Cast iron bodies handle demanding jobs
  • Durable hardened steel gears
  • Needle bearing construction
  • 1st Stage: 11 GPM@650 PSI
  • 2nd Stage: 2.9 GPM@2,500 PSI
  • Inlet: 3/4in.
  • Outlet: 1/2in. NPT
  • Dimensions: 5.5in.L x 3in.H x 4in.W
  • 2.83in. bolt circle with four holes spaced 2in. on center with 0.344in. bolt hole diameter
  • Minimum HP: 5
  • RPM Requirement: 3,600
  • For use with open center hydraulic systems only
  • Rotation: Clockwise

Key Specs

AttributeSpecification

item#

1012

Brand

Concentric

Manufacturer's Warranty

1 year limited warranty

Ship Weight

8.3 LB

Max. PSI

3,000

Max. Flow Rate

11 GPM
AttributeSpecification

Shaft Diameter

0.5 in

Shaft Type

Keyed

Pump Type

Gear

Stage

Two-Stage

Material

Cast Iron

Thread Type

Other

Reviews

Questions & Answers

95 Reviews This action will navigate to reviews.

Questions

1–10 of 26 Questions  
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  1. Can you suggest some electric motors which are compatible with this pump?

    1. This pump requires a 3 horsepower electric motor that turns counter clockwise at 3600 RPM. At this time, we do not carry a motor with these specifications.

      Helpful?

    2. I am running a 5hp, 3ph. "C" face motor with an open spool hand valve. This is moving a hyd. cylinder on a pressing application. You will have to find an adapter to go from the "C" face/frame number on your motor to the USA4F17 pattern on this pump. Lovejoy style coupling to hook together.

      Helpful?

  2. Does the reservoir have to be mounted higher than pump?

    1. yes

      Helpful?

    2. It is recommended that the reservoir is mounted higher than the pump.

      Helpful?

  3. Can I use ISO 32 Hydraulic Oil with this pump?

    1. yes.

      Helpful?

    2. You can use ISO 32 hydraulic oil with this pump.

      Helpful?

  4. what is an open center hydraulic system?

    1. In an open center valve, the pressure port is "open" to tank in the neutral position. Basically, if the valve is not shifted to the A or B work ports, then the fluid can free flow back to tank.

      Helpful?

    2. Open center hydraulic system means it has the inlet port connected to the outlet port in a neutral position.

      Helpful?

  5. Is 5 hp minimum for a gas or electric motor?

    I see that this pump is rated to work with a minimum 5 hp motor, is that 5 hp gas or 5 hp electric? I have heard that a gas engine hp rating is about half as effective as an electric motor's rating. This doesn't make sense to me but as I mentioned I have heard that a 5 hp electric motor would perform as good as a 10 hp gas engine. Any insight? Thanks

    1. I recently acquired a 5 gal/min. pump from a 5 hp 220volt hydraulic system and made a log splitter I powered it with a 5.5 hp gas motor. the motor stops dead if dead headed at about 1200 psi It does a great job on the smaller pieces up to 1000 psi The unit ran at 2500 psi all day in the hydraulic unit I removed it from, so I think your reasoning is very correct I am going to try a 2 stage pump The 5.5 hp won't handle the 5 gal/min at high pressure

      Helpful?

    2. This Haldex 11 GPM, 2-stage pump requires the use of either a 5 hp gas engine, or a 3 hp electric motor.

      Helpful?

  6. for rotation on hydraulic pump, do you look at the shaft end or the back end of the pump?

    1. shaft end

      Helpful?

    2. The rotation is determined when facing the shaft.

      Helpful?

  7. Is there a rebuild kit for this 1012 pump & where can I get it?

    1 answer

    1. Parts for this pump are available through our sister company, Jacks Small Engines. Please visit www.JacksSmallEngines.com for pricing and availability.

      Helpful?

  8. How many inches is the center pilot around the shaft?

    1 answer

    1. The center pilot diameter measurement around the shaft is 1.782".

      Helpful?

  9. Will this pump accept a 45 degree ORB fitting?

    1 answer

    1. This pump has a 1/2" NPT outlet, it is not compatible with an ORB fitting.

      Helpful?

  10. How many tons will it push on wood splitter

    1 answer

    1. This pump will put up to 2500 psi into the cylinder of a log splitter. To get the actual force you need to know the surface area of the piston in the cylinder that the hydraulic fluid is pressing on. For example a 3" diameter cylinder head, or bore size, would have a surface area of approximately 7.06 square inches. 2500 multiplied by 7.06 would be 17,650 pounds of force, or 8.825 tons.

      Helpful?

Warranty

Manufacturer's Warranty

1 year limited warranty

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.

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Concentric Hydraulic Pump, 11 GPM, 2-Stage, Model# 1001689
4.7 out of 5 stars. 95 reviews

Concentric Hydraulic Pump, 11 GPM, 2-Stage, Model# 1001689

Item # 1012

$249.99