By: Dann757 On: Fri Aug 05, 2011 4:12 pm
Jessica at EDI was very helpful. This is a bear but I'm gaining on it I hope. The Honda GX 240 (8hp) engine has a gearbox in between it and the Cat pump. The pump seems similar to a Cat 310. Jessica was astounded that they would put this pump on a power washer since she felt it is a car wash pump. My busted pump is apparently 2500 psi and 4gpm.
I see these pumps are pricey. The old manual sings the praises of this gearbox and I agree. The problem is, I guess, I have to find a pump with an input shaft of 20mm, seal shoulder of 25 mm, that extends 45mm past the case, with 4 mounting holes 53mm on center. And the mounting surface diameter is 88mm ( imagine an old German 88 round comin at ya...)
My manual has the schematic as shown, but the numbers are apparently irrelevant.
I gotta do some more homework, Jessica sent me a pdf of the Cat 310 pump, I'll have to figure out what parts I need. This could get mad pricey too. I looked around briefly, just one little ceramic plunger is like $80.00.
As you can see, I had to split the gearbox to take the pump off. Engine crankshaft ends with the little gear in the one half, and the big gear is mounted on the input shaft to the pump. Will definitely consider a cheaper pump if there's a match for this situation. It would be easier to get the parts as far as everything going back together matched up. The Cat pump is a serious good quality unit.
Thanks for all the help and motivation so far!
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