Or find a reliable supplier who makes and sells the oil pump that has the
original design with the hardened shaft and the cross pin. With wear on the
soft drive spindle, the lobes will also wear because things are no longer
parallel. With this wear, the oil pressure will drop somewhat with time.
It did on mine.
With the new hard shaft I put in, the oil pressure hasn't dropped any
noticable amount in 8 years.
Don Elliott, 1958 TR3A
----- Original Message -----
From: "MARK J WEATHERS" <markjwea@email.msn.com>
To: "Peter Vucinic" <vucinic@b140.aone.net.au>; "FOT" <fot@autox.team.net>
Sent: Wednesday, September 03, 2003 6:35 AM
Subject: Re: TR4 Oil Pump Rotors
> Peter, I have also noticed the rotor and shaft material is pretty soft. In
> an effort build a close tolerance pump, I nickel plated the shaft and
rotor
> to close up the tolerances, then lapped the housing to establish end
float.
> The plating should improve the surface hardness, but obviously won't help
> the housing wear. Due to other problems I haven't had much time on the
pump
> to evaluate it. I would be interested in developing a better assembly with
> you if you want to work on it.
>
> Mark
> '72 TR6
> ----- Original Message -----
> From: "Peter Vucinic" <vucinic@b140.aone.net.au>
> To: "FOT" <fot@autox.team.net>
> Sent: Wednesday, September 03, 2003 12:26 AM
> Subject: TR4 Oil Pump Rotors
>
>
> > Does anyone have a supplier, who can actually supply 'good/high' quality
> oil
> > pump, spindle & rotor assemblies? (504862)
> > I fitted a new assembly 1,500 miles ago, and the spindle journal,
closest
> to
> > the rotor, is severely scored and has worn down about 0.002" in
diameter!
> The
> > shaft material looks awfully soft to me as well which, obviously
wouldn't
> > help!
> > Yet I have some original pump assemblies that don't have a mark on the
> > spindles? Anyone else come across this drama before me?
> >
> > Thanks in advance
> >
> > Kind Regards
> > Peter Vucinic
> > WORKS-4
> > TR-4
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