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Re: Oiling trunnions + jacking up

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Subject: Re: Oiling trunnions + jacking up
From: "Nolan Penney" <npenney@mde.state.md.us>
Date: Thu, 08 Feb 2001 06:16:41 -0500
Along those lines, I have become rather fond of a synthetic marine grease.  
Can't remember the name, but it's the stuff you always find in the boating 
isles of stores.  It's not soap based, so it doesn't wash out easily.  It's 
quite thin, so it flows through things like trunions quite nicely.    In the 
salt water marine applications that I've seen it used on for years, the wear 
has always been negligible, and the corrosion has been negligible as well.  

It's in my trunions of course.  Pumped it in until it was squirting out all 
ends, wiped up the excess and called it done.

>>> Joe Curry <spitlist@gte.net> 02/07 10:32 AM >>>

Is this thread going around again????

Personally, I don't believe it is worth the effort to disassemble the 
suspension in order to get the old grease out, unless someone
used a very thick type that is prone to hardening.  Today's grease technology 
lends itself well to lubricating the Spit trunnions of
the proper type is used.  I have tried it both ways and find that the trunnions 
remained lubricated just as well with modern grease as
they do with gear oil. (Maybe better if yours leak)!

Therefore, if you can shoot more grease into the system, just do that on a 
regular basis and I doubt you will have any wear problems.

Bear in mind when these systems were designed, the typical grease that was 
available turned to wax in a matter of time.

Joe

"T. .R. Dafforn" wrote:
> 
> Hi All,
> Trunnions on my spit have had the unfortunate DPO treatment with grease rather
> than oil...
> Tried using a grease gun to force oil in to displace the grease, no luck..
> So I guess is dismantling time...
> Is it worth cleaing the trunnions and reusing?
> or should I just fit new ones?
> If I fit new ones, should I go for original satnpart ones if I can?
> Cheers
> Tim
> Richard B Gosling wrote:
> 
> > John,
> >
> > You do not need any sort of special attachment to your grease gun to use 
>oil in
> >  it - just fill it with oil and use it just the same.  A little may leak out
> >  where it clips to the nipple, but not a lot, and no more than the amount of
> >  grease that ususally escapes when you do this sort of job.  Oil, being
> >  thinner, may have a better chance of squeezing out of the sides of the 
>joint -
> >  but, being thinner, it flows into the trunnion much more easily than 
>grease,
> >  so you don't need to put so much load on the grease gun handle, so there is
> >  less pressure trying to force the oil round the edges of the nipple.
> >
> > I would advise you to get a new grease gun for oiling trunnions - you don't
> >  want to have keep emptying and cleaning your grease gun every time you swap
> >  between greasing and oiling.  I picked up the cheapest one in Halfords for 
>a
> >  very few quid and it has worked fine.
> >
> > You can jack up the whole of the rear of the car.  However, I would advise
> >  placing the jack under the rear cross-member of the chassis, rather than 
>the
> >  differential - I have done this many times.  Remember to chock the front
> >  wheels!!!  This is less important if you have a trolley jack, but you 
>should
> >  really still do it.
> >
> > Richard & Daffy
> 
> --
> Tim Dafforn
> University of Cambridge
> Structural Medicine Unit
> Cambridge Institute for Medical Research
> Wellcome Trust Centre for Molecular Mechanisms of Disease
> Hills Rd, Cambridge CB2 2XY.
> UK
> Tel. (01223) 336829
> Fax. (01223) 336827
> http://smokeroom.cimr.cam.ac.uk/

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