There are also a couple of check valves and seals that can go bad so if?you're
gonna tear it apart then you might as well check those too. The seals are
basically paper gaskets between the check valve and the housing?and if they
fail then you get no suck or blow. Same goes for the valves and you can check
them?out?before you tear it apart?by pumping the?lever with your hand while
placing something over the inlet?tube to?see if it pulls and then the?outlet
tube to see if it push's. (I wore latex gloves so it provides?a pretty good
seal.) The inlet tube should only pull with no pushing on the opposite stroke
and the outlet tube should only?push with no?pulling. If you notice either of
them doing both then one of the valves or seals has failed. Don't know if new
valves and seals are availiable but I just used parts I had?from other pumps I
had laying around.
?
Hope it helps?
?
Jon
-----Original Message-----
From: Mike Harper <roadsterdude1600@yahoo.com>
To: datsun-roadsters: autox.team.net <datsun-roadsters@autox.team.net>; Tim
<tputland@charter.net>
Sent: Sat, Aug 1, 2009 5:49 am
Subject: Re: [Roadsters] One quick question left
If the arm of the pump functions well, the only thing that should go "bad"
would
be the diaphram. Some fuel pumps have a series of screws and can be
disassembled to replace the diaphram. If you have one of these you can inspect
it, or replace it before installation. The other type is sealed, and a
throw-away if it fails. Replacement diaphrams are available. As far as "bench
testing, I would not know a good way to do that on a mechanical fuel pump, but
it is not a difficult r&r if it turns out to be "bad".
Mike Harper
--- On Sat, 8/1/09, Tim <tputland@charter.net> wrote:
> From: Tim <tputland@charter.net>
> Subject: [Roadsters] One quick question left
> To: "datsun-roadsters: autox.team.net" <datsun-roadsters@autox.team.net>
> Date: Saturday, August 1, 2009, 8:30 AM
> I found the cap at NAPA--thanks Jim
> for the quick answer.
>
> But no one mentioned testing the fuel pump. Can this be
> done off the car somehow? I don't want to install a pump
> just to find out it is bad as well.
>
> Tim
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