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Discussion Starter #1 (Edited)
My water pump went in my scrambler. I took it apart and the shaft on the counter balancer that drives the water pump broke off of the gear face. I have read that there can be grooves made over time from the seal I guess but there was barely any grooves not more then a couple hairs off your head. I am curious on why it broke because all the bearings are really good and there was no obstruction, looks like it just broke off. I did bottom out kinda hard on a rock through the trails but I don’t see how that would have anything to do with it. Anyone have any input








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Discussion Starter #3
Yea I have seen allot of post of this happening especially with a 20 year old machine. Thought about converting to an electric water pump but decided against it. Hope this is the only time it happens


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How do you plan on fixing it? Although the counter balance shaft has been superseded from 3084172 to 3087042 and it's still available, it costs $580! I could get you one for about $400 as could a sympathetic dealer, but is it worth fixing?
 

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Discussion Starter #5
I just found one on eBay for $100 it has no grooves in it so it should be good to go. If it breaks again I will be figuring out how to make an electric pump work, found one for $150 just wasn’t sure if it had enough liters per minute to match up to oem


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It's not the grooves from the seal that caused the break - it was the failure to radius the transition from one diameter to another diameter of the shaft. Inspect the replacement shaft carefully and maybe take it to a machine shop for modification before installation. A good machinist should be able to look at the breakage and suggest a modification that will prevent future breakage.
 
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