Hercules Engine IX series Water Pump Removal

I was able to remove all of the hoses, but can not figure out how to remove the pump. Can someone tell me what the assembly is that drives the pump? It appears to be a oil pump and is mounted close to the fan. I think I need to partially disassemble it to remove the water pump.

I am trying to go slow to not damage the cast iron pump as I am sure it would be dificult or impossible to replace it.

I have posted a photograph of it.

• Engine Photograph

There is a seam in the housing where the pump would split, but I am thinking the bearing shaft runs completly through the pump and it will have to be removed for disassembly. There are also what appears to be retainers on each end with a pin that runs vertially through the shaft. I am thinking these are to somehow set the timing.

I can provide more photographs or answer any other questions you have.

I am trying not to repeat old behaviors where I disassmble items and end up damaging them becasue of my haste.

• close up of pump

By the looks of the drive "tabs" on the flange, that's the case!

The photograph is actually a high resolution one, but the yesterday web site only captures a basic photograph. i.e. can not enlarge it or perform a closeup.

I would still like to explore the repair of the pump. I like the concept that it was an add on feature.

I am a fan of thermal syphon systems as I have that set up on two of my cub lo boys.

I am thinking I may need to take a few more close up photographs of the coupler between the mag drive and the pump as that will eventually need discounnected.

If you advise that no harm will result from removing the drive flange, I think that would be the next best step as then I could work on it on the bench as opposed to mounted on the engine.

Separarate question, would you happen to know the approximate year of the engine?

In regard to fixing water pumps, there are not usually complicated - you just have to be real careful taking apart. I wouldn't trust a water-pump rebuilder not to break it.

Those "ad-on" water pumps were used in many older engines. I've got a 1918 Ford Model T with one.

Did you try callling Zimmermans for info? He's a Cletrac expert - probably the most well known in the country, and therefore also a Hercules guy.
717-738-2573

How big a genset to you have? I've got a 15KW Fairbanks-Morse with a Continental gas engine.

Here are four photographs. They are the same quality, but I think they should enlarge nicely as they are from a high resolutino camera. yesterdays tractor limits the size of the photograph.

If I thought it would be fairly inexpensive, I would rather fix the water pump; otherwise the elimination of it from the unit would be great.

I have had the mag off about eight times. Also, I loosened or removed all of the bolts related to the pump.

The main issue is how to remove the pump from the original magneto drive flange. There is a "slip flange between the drive flange and the pump and a vertial pin that is easily removed from the shaft that connects the two components. But I am not sure where to apply force to disconnect the two.

If you would like additonal photographs I would be glad to take them, that would be the least I could do for your gift of advise.

Any suggestions would be appreciated

• Hobby farm

I have added a close up photograph and commented in another reply of what I have done so far with my removal efforts.

I would like to remove it and then chase down the necessary parts. I am assuming there is a seal that has gone bad.

• close up