Jay:
Interesting, because I had the exact same issue. Looking back, I
believe I did it wrong, and would do it differently (and will do it
differently if/when the tranny gets pulled next time).
I was unable to resolve where the spring clip was fitted. The
circlip was easy, the spring clip was, well, not obvious. And you are
right, Bentley was no help. I asked my favorite LBC mechanic, and he had
never added an OD, and had none in the shop at the time, so he was
unclear on where it went.
I now *think* that the spring clip is intended to fit INSIDE the
pump cam, between the cam and the mainshaft. Basically, it makes the
pump cam a press fit on to the mainshaft. The woodruff key will fit in
the keyway, the spring clip then fits on the mainshaft with its ends
"straddling" the key, and the pump cam is then pressed on over the
spring clip. The circlip is then snapped into place
to retain everything. WARNING: I have not tried this. I came to this
conclusion AFTER the car was back together.
Why Laycock didn't just make the pump cam a press fit on the
main shaft in the first place is beyond me. Perhaps there were some
product rationalization issues. I just don't know.
My solution at the time was to omit the spring clip entirely.
This makes the pump cam a somewhat sloppy fit on the mainshaft. My
thinking at the time was that the cam needed to "float" on the
mainshaft, but of course it was troubling that I could not determine
what the spring clip was for. At the time, I wasn't even certain about
the circlip. Bentley didn't help, and the Moss catalog I had at the
time didn't even show a circlip. I believed there had to be one, because
the pump cam would be free to move without one.
I now wonder if/when the woodruff key will shear, rendering my
OD inoperative. So far, so good, but I think I will need to go back in
one more time to correct my error, if in fact it was an error.
Let me know how this works. If nothing else you will help me
determine if I need to pull the tranny again.
Cheers,
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Jay Snable
Sent: February 06, 2006 10:41 PM
To: 6pack
Subject: J-Type OD conversion pump cam clips
Hopefully this is the last question about converting my 4 speed to O/D
with a Quantum Mechanics kit. First off, thanks to Vance for his advice
on lapping down one of the spacers I was having an issue with (no
bushing float). That worked great, although it took a long while to go
from a 0.122" spacer to the final 0.113".
Now I have a question regarding the two clips associated with the O/D
pump cam. One is a ring clip and one is a spring clip. Both can be seen
in the TRF drawings and the Moss catalog. I can't see how both should
fit on the mainshaft along with the pump cam. It looks like the cam
should go on first (towards the front of the car), followed by the ring
clip, which would fit in a machined groove on the mainshaft. I don't
really see anywhere for the spring clip. I suppose it could go on after
the ring, but then it would be blocking what appear to be some oil
holes. Bentley seems to ignore these bits...
Thanks,
Jay
'73 TR6
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