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Progress report 1: Tried drilling this morning... no joy... hardly scratched the clamped down race in a drill press with Cobalt bit. So back to researching and learning... and of course there is an easy and safe way to drill a hole in hardened steel ... I'll try this other method first and...

Hi, No worries there. The water pump has a single outer race, which holds a ball bearing on the impeller side and a needle bearing on the pulley side. This outer race is long; 2" 1/8 and the two bearings run on the outer edges, so there is plenty of room and open space between the actual...

Hello, And thank you for this valuable link! I sent these guys an inquiry for pricing of bearings, seals and impellers. Once I have all parts, I will start rebuilding the 4 HMMWV 6.5 L Diesel water pumps I have here: First I need to clean, inspect, sandblast and inspect for cracks or defects...

Yep, you're right, the bearing seals need some sort of venting hole as well. Making a 1/16" hole in the seal should be ok for the old grease/overflow to be evacuated. Ideally on both sides, but this is only possible when the bearing is not yet installed. Not too worried about a little grease...

Thanks! But rest assured... although I do not have the right papers to state I am a Yank, I have always felt like one, always been on your side in any discussion... actually got myself into trouble and even fights when I was very young because of my pro-US-attitude... Was fortunate enough to...

...comment to self... Actually, to keep things simple... it seems to me that the cause of the worn out bearings in effect is... lack of lubrication... the "greased for life" bearings keep the grease inside the bearing housing alright, but the bearing itself eventually runs dry, as the grease...

Thank you! Best info I got to date!! It seems to me that the HMMWV waterpump is a weak spot, or am I wrong? Taken apart with puller and 6T press and there are 2 bearings. The roller ball bearing is at the impeller side with 6 balls, held in a plastic cage, which runs in a long hardened outer...

Hello, And thank you for your good advice. I will research using the full list of part numbers and exchange numbers. Until now I only had the casting number 12557071, but I guess that is not correct to search for replacement parts. Thank you again!! Jake

#Hi FPChief, Thanks! Much appreciated, but not really an option for me at present. I'll keep on looking for the actual repair kits for this pump. Best, Jake

Hello, I realize I am not in my usual forum, so my apology for intruding, but have a question for HMMWV users. Anyone know a good value source for replacement bearing WR17297 and for the seal assembly of these water pumps? Need to replace a few run out bearings; sorry not in a position to...