W60 Raw Water Pump Woes

[Paul Lefebvre]

I had a few extra minutes last night before supper and thought I would check
the impeller on the raw water pump. Right, that job can be done in a few
minutes!! First of all, I assume that early owners of these engines have
long ago strung up the engineer that approved that design??

As you are all aware, getting to the bottom inside nut behind the pulley is
a PIA. I was wondering what others have done to make the job easier. Weld
(Braze) on a nut or perhaps tap threads directly into the flange on the side
of the pump. I don’t look forward to having to service that impeller over a
hot engine.

Paul

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[Chuck Ruble]

Paul, I assume you have the W60 based on your affection for the designing engineer.

I'd be reluctant to heat or do anything that could potentially weaken the mount.

There's no easy way to remove it or install but it does get easier each time. A small moving blanket laid over the engine allows me to lay across the top and work. A pair of 7/16 open ended wrenches seem to work best. I first run the bolt thru the pump base, and holding that in place slide the unit into place on the engine mounting bracket. Once you get the first nut on and snugged with your fingers the rest is relatively easy. The trick is be able to do it without looking at it (I can't focus that close).

I've taken to pulling the entire pump off each winter, removing the impeller allowing it to flex back to a normal shape. Honestly, taking the entire engine out wasn't a whole lot harder than removing that dreaded pump with the engine in place.

The pump can be miss aligned due to the size of the holes in the pump mount and the engine accessory bracket, try to get it as square with the front of the engine as possible so the belt isn't improperly loading the bearing surfaces in the pump.

Linus was kind enough to send me his old pump which I keep as a spare. I'll swap out the pumps in the event of a failure, saving the impeller replacement for later. Linus I didn't forget about you. You went with the Cummins right? I'll send you some oil and fuel fitters.

Chuck

On 4/9/08, Paul Lefebvre wrote:

I had a few extra minutes last night before supper and thought I would check the impeller on the raw water pump. Right, that job can be done in a few minutes!! First of all, I assume that early owners of these engines have long ago strung up the engineer that approved that design??

As you are all aware, getting to the bottom inside nut behind the pulley is a PIA. I was wondering what others have done to make the job easier. Weld (Braze) on a nut or perhaps tap threads directly into the flange on the side of the pump. I don't look forward to having to service that impeller over a hot engine.

Paul

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