Jon,
Here is what the pulley set looks like:
http://www.harborfreight.com/catalogsearch/result?q=power+steering+pully+puller
> The puller Ken described is the same thing I "borrowed" from Orielly to do
> mine. It was only $25 to buy it so I kept it.
>
> Sully
> 77 eleganza 2
> seattle
>
> On Mon, Oct 17, 2016 at 2:52 PM, Ken Henderson
>
> > Jon,
> >
> > Is there a nut on the shaft of your PS pump? I think not and that you're
> > trying to unscrew the allen socketed shaft of a pressed on pulley. What
> > you need is a puller for that pressed on shaft. Last week at GMCMI
> > Mansfield, I replaced the PS pump on my '76 X-Birchaven. I borrowed a
> tool
> > kit from AutoZone. The puller in that kit clamped around the groove of
> the
> > hub of the pullled. Its forcing screw seated against the shaft which
> > you're apparently trying to turn with an impact wrench. With moderate
> > torque on that forcing screw, the pulley slid right off of the shaft.
> > Another tool in the kit pressed the pulley back onto the rebuilt pump's
> > shaft.
> >
> > The fact that GMC used both tapered (nut retained) and straight (pressed
> > on) pulleys leads to such confusion.
> >
> > Also: while I think all GMC's used the higher pressure pumps, when you
> > remove the large nut retaining the reservoir (the high pressure output),
> > you'll free a shuttle and spring; that shuttle, depending upon its
> length,
> > sets the output pressure, so if you use the shuttle from your old pump,
> > you'll set the proper pressure. At the very least, compare the lengths
> of
> > the two shuttles.
> >
> > HTH,
> >
> > Ken H.
> > Americus, GA
> > '76 X-Birchaven w/Cad500/Howell EFI & EBL,
> > Manny Brakes & 1-Ton, etc., etc., etc.
> >
www.gmcwipersetc.com
> >
> > On Mon, Oct 17, 2016 at 5:09 PM, Advanced Concept Energy Solutions <
> >
> > > Since I can't seem to get any info on a new power steering pump I
> ordered
> > > a rebuilt from Applied. I need to change pulley to new one. Does anyone
> > > know if the Allen nut on the end of the shaft is a right hand or left
> > hand
> > > thread. Can't tell direction of pump when it's out now. Used electric
> > > impact in trying to get it off turning left. No luck even with heat!
> > Maybe
> > > it turns off right??? Can 't force it much more or there will be
> nothing
> > > left of the alien key hole.
> > > Any ideas?
> > >
> > > Jon Darcy ACES
> > > North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC
> Dash,Manny
> > > Trans, FiTech FI,Honda 6010
> > >
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--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class