Roy ;
STP is good stuff ! won't leak out as fast , have very good EP
(Extreme Pressure) characteristics too so stay with it .
Yes , you read what I wrote perfectly and you sound to have a good
grasp of it .
There's a goodly bit of " feel " to it , if you found a new ,
American made worm gear (lucky dog) you can set up the lash to zero
play or maybe even a tiny bit of preload whist in the dead center .
The dead center of thew wheels turning ability is often different
from the dead center os the steering box , is why it's wise to
disconnect the drag link as that's easier than grappling with a
pitman arm puller...
I personally like 'em as close as i can get to zero lash without any
binding as I drive these oldies like they were made to be driven ~
hard & fast =8-) .
-Nate
Roy wrote:
>
> Nate,
> This all came about because I rebuilt the steering box and am
trying to get it "right". I filled the box with STP oil treatment as
I thought I saw that as a recommendation in an earlier post. Am I Ok
with that or should I get it out of there and put 90W in?
> Second, some of your terminology went over my head. If I got
it right, what I think you are saying is to adjust the big screw at
the bottom of the shaft for 2# pull with wheels off the ground, then
adjust the lash adjuster for zero "slop". I went to great pains to be
sure the pitman arm is straight down at the center of wheel travel.
That is one of the reasons I don't want to F with it.
>
> Roy
>
> ----- Original Message -----
> From: vwnate1
> To: old-chevy-truck@yahoogroups.com
> Sent: Saturday, September 22, 2007 5:06 PM
> Subject: [old-chevy-truck] Re: Steering gear adjustment
>
>
> Roy ;
>
> I like to set 'em up a little bit " light " to compensate for the
> center wear :
>
> Wheels off the ground , steering gearbox full to tippy top with
90W
> gear oil then grease all the king pins and tie rod ends until the
> front wheels easily move side to side with light hand pressure .
>
> Ajust the worm gear pre-load to 2 # or so , use a fish scale
> attached to the outer spoke of the steering wheel and pulled at a
> 90° angle (' Tangential Pull ') , then center the steering box
and
> adjust to barely zero play , if you're lucky it'll actually get
> tighter feeling as you turn it off center but *not* be so stiff
the
> steering won't " unwind" by itself as you come around a right
hand
> corner , let go the steering wheel and punch the gas .
>
> It's a trick getting the pre-load & slack adjustments to balance
> with the worn spot on the center of the worm gear ~ if you read
the
> GM steering gearbox rebuild insteructions they tell you to set it
up
> tight in the dead center as it'll be looser as you turn off
center ,
> this is O.K. as 90 % of the wear occurs in the center position .
>
> Removing the drag link is usualy easier than popping the pitman
arm
> off and allows you to ascertain *true* centerpoint , this is
_VERY_
> important as these were just slapped to-gether by bored assembly
> line workers and are often a few splines off center... this
screws
> up the front end's geometry and makes the rig less pleasureable
to
> drive . if the pitman arm isn't pointing straight down when the
box
> is in true dead center , then you'll need to remove it and
properly
> position it a few splines .
>
> As always , the Devil is in the details .
>
> So to recap : preload on the _worm_ gear , NOT the sector
> adjustment , that one gets adjusted best as can between less play
> and too much drag .
>
> I hope this helps ? .
>
> -Nate
> Roy wrote:
> >
> > I think I have seen some stuff on this before but can't find
it.
> The Shop manual says to disconnect pitman arm and adjust for 1 to
> 1.5 lbs tangential pull on the wheel to maintain motion near the
> ends of ravel. Then it says to adjust lash adjuster for no play
then
> check for 2 to 2.5 max tangential pull through center. I thought
I
> saw something that essentially said adjust for 10 lb tangential
pull
> at center then adjust out all play with lash adjuster. That would
be
> easier than pulling the pitman arm loose. Am I crazy or did
someone
> provide the latter procedure? Does it sound reasonable?
> >
> > Roy
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
Ole Chevy and GMC trucks rule!
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