Technical Hilborn 150 A Fuel Pump / Internal Diagram ?????????

I am looking for a diagram( internal/external) of the ***embly/dis-***embly of a Hilborn 150 A fuel pump. I have three known good units / and a box of others that are shall we say suspect. There are many companies offering rebuild kits in the under 20$ range . I have looked every where, but found nada . I have seen a million plumbing diagrams /and sheet on reversal of timing cover/belt drive - no internal diagram though.Any help is greatly appreciated.
Mitch

 

I don't remember there being a lot of parts in there. Is it the byp*** you are asking about?

 

I am interested in byp*** info also on a hilborn 150

 

I think the only thing available is the o-ring for the cover. Those things are 40 years old! Mitchell I think your gonna have to dis-***emble one of your good ones to see. When you put them back together oil the **** out of them and turn them as you tighten the cover bolts down a bit at a time. Lippy

 

One cant really rebuild those pumps except for changing the front cover o-ring. Best to send them in to the company or spe******t that can properly set the clearences and flow test the unit. Many racers have gone away with the self mounted check-valves and jet holders and chose to run them seperatly. Even Hilborn of late, has forgone that style and just offers a single outlet pump. Hilborn was recently sold off to Holley so we are still trying to understand how that will affect the racers, Don Enriques is moving back east with the company tho

 

I'm sure you noticed that the various 150 pumps [-00,-0,-1etc]have different size internals.The pressure side of the pump shares one p***age with the byp***/regulating all done externally by what you bolt on.Don't remember much else being in there?

 

Correct on all accounts. I am looking for info/ diagram on the pump itself.I have a 1/2 and a couple of 1s. I have a DSR 1/2. A hilborn 1/2 prepped by DSR. And a legit Hilborn 150 that have all been flowed /etc. ( all good/etc). we run the separate check valve/jet holder.( Mike at alky digger set them up/ as he did all of our stack injectors.) These pumps are just extras and as always curiosity has me thinking. I had also gotten word that holley had bought them out/ and that Don was coming to BG.
I am looking for another cover also/ just so I have complete units. ( even if they are in the spare/junk /whats left over box)
Thanks again for the info.

 

Both bearings, seal and casing o-ring should be replaceable, just like the older BL pumps. Parts should be readily available over-the-counter from your local bearing shop (e.g. CBC Bearings in Australia). The internals on the 150's are gear (not sliding vane) from memory, so simpler than the BL. BL info attached.

Cheers,
Harv

 

If you are like me and never saw the internals and directions about the pump here is the PDF that @Harv posted in photo form.

 

Thanks Loudbang for finding that. Mine is not a vane style but I get the picture. Still pretty cool the fact that I have one that still turns as smooth as it does I just need the cover. This is what all but the DSR one I have looks like.

 

The last 30 or so years ago Hilborn had gone away from the bronze liner in the pumps and went with just hard anodizing inside. It worked fine but it mandated a pre-filter for if any trash went through , the housing was not rebuildable, Enderle still uses the bronze liners in their pumps. Note that in the recent offerings from Hilborn they include items made by Enderle

 

Interesting timing cover!

 

On my car I never got past a PG175 pump. But some guys I know have moved on

 

The bronze liner is what always wore. The clearances are very close on them. Hilborn and Enderle had special machines set up to hone the bushing to size. Without that, I don't think a normal person would ever get it right. The fuel pumps were a real pita for most of us. They didn't last long enough to be worth the price. There's a reason Waterman started making pumps. One other thing. Nobody ran the pump byp***. The Enderle shut off that byp***ed when the pump shut off made the byp*** obsolete. The very 1st systems had a simple on -off valve that put the pump at the pressure the byp*** was set at. That had a lot to do with wearing out the pumps.

 

Can you expand on this? I have old school pumps and I am trying to visualize how you would even do this.

 

Excellent! As a model car guy, very useful, too.

 

Some early Hilborn pumps had the check-valve manifold as part of the pump as pictured and there was a spring and poppet in there to. all of that was removed and plugs installed except for a single outlet. The check valves and jet holders were now installed as part of the return lines. There was a lot of work to make those pumps like that and much simpler to eliminate the manifold from the casting and go with a single feed outlet, Also the poppet in the manifold would get gummed up easily because the pump was aluminum

 

Understood. Thanks.

 

I don't think I'm any help here but what I have learned is that the old Hilborn pumps can only rebuilt 1 or 2 times, then that's it. I ran a 150 pump and discovered it was too big for my 355" motor. I bought a billet Hilborn pump (rebuildable) and have been running it for 10 years trouble free. Like I said I may not be any help. By the way I use Alky Digger.

Pat

 

Alky Digger are good people.

 

Agree. I deal with them from a loooong way away, and I speak funny Aussie english. Even with that for them to battle with, they are still great to deal with.

Cheers,
Harv

 

Like a lot of you I also use Mike /at Alky Diggers. I am just trying to learn as much as I can while I have some people that have actual field knowledge -( you guys- again thanks for all the information). I made the cover for the mule motor on the cheap - got the materials/ a lathe/ a welder (and I do like to see if it can be done sometimes) -that's half the fun. The mule motors looks aren't really important as long as it gets us as close as possible on the tune before it goes in the car.
All of my byp***es/etc are as Mike set them up- in the lines. As earlier stated the the second and high speed are in lines separate from the pump. My hope was that someone on the Hamb actually had an internal diagram so I can actually tear this one down and learn more - even its its only what not to do / or use.
I have a very nice DSR pump- (For Willys)- and a later /smaller hilborn that DSR also prepped-( came with the system for the Prefect and flowed really well at Alky Diggers)and a 150 hilborn that flowed and checked out pretty well. - the rest are as I said kinda whats left over. Trying to practice on them so to speak.

 

Hi Harv, Can you tell me the size of the lip seal for a Hilborn 00-102 fuel pump. Dale. Qld 0418 254 201 Hope to be able to get one from CBC