Bill;
Be sure the 3/8 hex drive does not bottom out in the driver on the cam, also
be sure there is no cam float forward that would bottom it out. Roller cams
require a thrust bearing in the cam cover to keep em back. Been there done
that.
Jim in Palmdale
----- Original Message -----
From: <ardunbill@webtv.net>
To: <theflatlander@webtv.net>; <bigsid@webtv.net>; marco <bk185@lafn.org>;
<ardundoug@aol.com>; <LITNMAN@aol.com>; <land-speed@autox.team.net>;
<clemtebow@aol.com>; <jhenrikson@aol.com>; <bigt@webfire.net>
Sent: Wednesday, April 05, 2000 9:47 AM
Subject: Fuel Pump Forensics
> Hi Folks. For the forensic detectives and pathologists out there, I
> removed the front end from the roadster today and the Hilborn pump from
> the cam drive. As I suspected, I found the 3/8" hex 'spud' drive on the
> pump sheared off because, for whatever reason, the pump seized up. No
> sign of harm at all to the cam drive we built, but I'll take the timing
> cover off anyway to see if any cam gear teeth are broken (I hope not,
> and doubt it).
>
> I was careful to handle the pump like the manual said, squirted oil in
> it anytime I put it on dry, and my hose and filter assembly on the new
> tank was immaculately clean when I put it together. So Hilborn can tell
> me what went wrong, if I did anything wrong, 'cause I don't want this to
> happen again. these rascals are expensive!
>
> It occurs to me that maybe this form of pump PG150C-0 did not like the
> previous mounting arrangement I had, original '50s Ardun belt drive
> setup with pump up high, so every time it stopped the fuel ran back to
> the '32 Ford tank, and I was using an electric priming pump to the
> output side of the Hilborn pump, so it had to pump air out of the main
> feed line every time to suck the gas up. Probably no more than 3 hrs
> run time on the pump since new.
>
> So any fuel injection experts out there please jump in and tell us what
> made the pump seize up. Note that with my new fuel tank, the pump is
> lower than the gas in the tank, so it stays full all the time, which is
> ideal. 2 gal tank is right in front of the cam driven pump.
>
> Cheers from ArdunBill in the Great Dismal Swamp, Chesapeake, VA, who's
> proud at least that his homemade pump drive conversion didn't bust.
>
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