Step By Step On How To Install Your New Little Giant, GXH2525A Pump On A Ex-cell XR2500, XR2700 Pressure Washer.

Below Is A Video Of the Pump Being Installed.

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A Little Bit About The Stock Pump. It’s A Devilbiss (Part# D27983) Radial Two Piston Design. This Pump Is Made Out Of All Aluminum. The Two Piston Design Is Known For Noise And Vibration. The Devilbiss Pump Doesn’t Use Oil And This Is Why It Only Last For 50Hrs And Is Also Known As A Disposable Pump. They Do Still Sell Them But In The Long Run It’s Better To Upgrade To A Pump That Uses Oil And Has More Pistons To Lower The Noise And Vibration.

A Little About The Best Pump For This Pressure Washer. It’s A Little Giant Pump. It’s A Direct Replacement And The Part Number Is GXH2525A. This Pump Uses Oil And Has A Life Of 500+ Hrs. It’s a Horizontal Triple Piston Pump Which Means It Has Less Vibration and Noise. The Pressure Can Be Adjusted Down From 2.5 GPM @ 2500 PSI. The Pump Has A Chemical Injector, Thermal Relief Valve And A Brass Head. Best Of All, These Pumps Are Made In The USA.

First Let’s Get The Tools Required To Install The New Pump.
1) Chanel Locks Or An Adjustable Wrench
2) 8mm Allen Socket Or Wrench
3) 4.5mm Allen Socket Or Wrench
4) A Tube Of Blue Lock Tight Or Thread Lock

Next Open The Box And Mounting Hardware. Make Sure You Have Everything.

Next Take The Black Pan Head Screws And Put The Lock Washers On Them So The Tapered Edge Match Up.

Then Apply A Small Amount Of The Lock Tight To The Pan Head Screws

Hold The Mounting Bracket In Position So The Holes Are Lined Up. While Its In Position Install Those 4 Black Pan

Heads Screws Though The Bracket Into The Motor.

Grab The 4.5mm Allen Wrench Or Socket And Snug Up Those 4 Pan Head Screws.

With Those Tight Its Time To Install The Pump. When Installing The Pump Make Sure The Red Cap Is Up.

Make Sure Your Key Way Is In Posistion Then Slide The Pump Onto The Shaft And Align The Bolt Holes

Then Install The 4 Silver 8mm bolts Though The Pump Into The Mounting Bracket.

Use Your 8mm Allen Socket Or Wrench To Snug The Bolts.

Next Grab Your Channel Locks Or Adjustable Wrench And Remove The Red Cap

While The Cap Is Removed This Is A Good Time To Either Check The Level Of The Pump Oil Or Put Pump Oil In.

Next Install The Black Breather Cap Becareful Not To Over Thighten It As Its Made Of Plastic.

That’s It Your Done. You Have Just Finished Installing Your New pump.





I bought the pump and installed it as you said and shown on the video. the video did not indicate to install a key between the shaft of the motor and the pump. Is a small metal piece required to be install into the slot on the shaft of the motor?

If so was this supposed to be shipped with the pump…because it wasn’t.

Please advise. Thanks.

Yes, you need a key way on the shaft to turn the pump. Depending on where you bought the pump sometimes they come with the pump but most times they don’t. So you will need to pick up a standard size key way.

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