A while back Pete gave me his used lifters to tear apart but snuck in the disassembled pump from his old HFCM. All in parts; said I could figure it out. I will, once I pull my HFCM apart.

In the meantime, here is what all those little parts look like. FYI, there should be a little spring in a valve assembly. All I did was touch it and it blew apart. I found the backplate but never could find the spring. Some people you should just not give things to.

 

That’s pretty cool!

Speaking of HFCM...not sure if you’re still updating the chart, but my original fuel pump has now made it to 255,000 and is still going strong! Knock on wood, of course...

 

Yeah, I was surprised when Pete gave it to me, I wasn’t expecting it. He had already tore it apart, but his interest in knowing how things work that would be expected.

It’s an interesting design, an unconventional application for brush contact, eccentric roller pump which has low friction load, and whetted motor with diesel. When I pull my HFCM I’ll find the pathways.

It's was reducing output, and I expect that was a brush contact issue despite there was a good amount of brush material left. Maybe a little dirt in the holder to reduce pressure, or just the contact surfaces.

I'll update the list.

 

I love looking at stuff like that and thinking “How in the world did the first person figure out a design like this would work?”

 

Thanks for posting the photos Jack. I have often wondered what the pumps look like inside.

Rob

 

Cool, Thanks for sharing the photos.

 

I got to play with my new iPhone macro lens.

 

i always wondered what the inside of those things looked like....

 

Thank Pete for cutting it open.

 

Aahh I see you found some time. And great job capturing the detail. It's been a while now but I think I cut the can motor apart with an exhaust tubing chain cutter. I was surprised when I took it apart to see the ground plates and other small details that make the pump a precise mechanism.
Thanks for getting those pics to the www.