JDcrawlers Messageboard

Is it possible that you have the relief valve set above 1000 psi? And it cracked the housing?[/quote] Couldn't answer that, This thing came with the house I bought, and was not in running condition. While doing the engine I noticed the cracked pump. One problem seems to expose another. My brother to...

Not really sure why you want to go away from the factory pump, there is no gain to a crank pump, and likely more hassle. You will need a whole new front casting unless you butcher the heck out of yours. You will need a really small pump about 9GPM, and will have to fab all new lines and such. I can...

It is currently a cam driven pump but I am more interested in converting something to be driven off the crank, probably have turn something to bolt to the crank pulley to drive the pump, physically not a lot of space up front though for a pump, good thing that it likely wouldn't require much of a pu...

Hi just finished getting my dozer running, sleeves in the cylinders and a rebuild. left final drive bearing replacement. now my pump has a cracked housing, this doesn't seem uncommon. I am looking for ideas for a substitute pump rather than buying another housing only to have it crack.
Thanks

Lavoy wrote:Do you mean another 420 engine?
Lavoy

No, I hope to sleeve and rebuild the original engine. I just wondered if there was something else more modern to bolt up with or without an adapter plate so I can use the dozer for now. Hopefully the rest of the machine is operational, I am told that it is.

Hi all, new to the site. I just purchased a property that came with a 420 crawler, 1957 I think, no serial number. It had antifreeze in one cylinder, upon further inspection I found a crack in one cylinder. I will likely fix that but in the mean time I am wondering if there is any readily available ...