Setting on the skids

Emery:

Thank you for your reply.

I first checked the height under the frame using the 8-7/16 dimension, which I believe corresponds with the 11-11/16" dimension to the top of the
racetrack hole. Once I had the frame at that level, I measured the beltline trim. This way I could use the beltline dimension to check the other side
without getting down on my hands and arthritic knees.

My switch works fine in two positions. It's just labeled with AUTO in the middle spot like a three position switch. So I guess the correct
nomenclature is actually Top Position= HOLD, and Bottom Position= AUTO/TRAVEL?

So am I correct to assume that if I select AUTO/TRAVEL the coach should automatically move up/down to the factory recommended ride height?

I would bet large amounts of money it won't do that, so if not, does the solution lie in the adjustment of the links on the travel height valves?

My coach is 1-1/2" low in the front, so I will be adjusting the torsion bars in my immediate future.

--
Greg Crawford
Knoxville, TN

1977 Royale, rear bath
Quad bags, brand unknown
 
Also, do you or anyone else have an observation on the amount of time the factory or other compressor should take to raise one side of the coach an
appreciable amount?

--
Greg Crawford
Knoxville, TN

1977 Royale, rear bath
Quad bags, brand unknown
 
Greg,

Before you can measure from the belt line you would need to measure from
the frame to the ground on each side and then measure the belt on each
side. There are too many variables between the body/frame and belt line
moldings to assume the distance is constant across sides. You will need to
verify both sides in the rear are set to the correct height(hence the
suggested four by four chunks for the left and right rear) prior to any
adjustment on the torsion bars.

Sully
Bellevue wa.

On Thu, Jul 30, 2020 at 6:14 AM Greg Crawford via Gmclist <

> Emery:
>
> Thank you for your reply.
>
> I first checked the height under the frame using the 8-7/16 dimension,
> which I believe corresponds with the 11-11/16" dimension to the top of the
> racetrack hole. Once I had the frame at that level, I measured the
> beltline trim. This way I could use the beltline dimension to check the
> other side
> without getting down on my hands and arthritic knees.
>
> My switch works fine in two positions. It's just labeled with AUTO in the
> middle spot like a three position switch. So I guess the correct
> nomenclature is actually Top Position= HOLD, and Bottom Position=
> AUTO/TRAVEL?
>
>
> So am I correct to assume that if I select AUTO/TRAVEL the coach should
> automatically move up/down to the factory recommended ride height?
>
> I would bet large amounts of money it won't do that, so if not, does the
> solution lie in the adjustment of the links on the travel height valves?
>
> My coach is 1-1/2" low in the front, so I will be adjusting the torsion
> bars in my immediate future.
>
>
> --
> Greg Crawford
> Knoxville, TN
>
> 1977 Royale, rear bath
> Quad bags, brand unknown
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
If you are fully lowered it might take 5 or ten minutes to completely raise it.
If your compressor rings are worn badly perhaps more.

Emery Stora

>
> Also, do you or anyone else have an observation on the amount of time the factory or other compressor should take to raise one side of the coach an
> appreciable amount?
>
>
> --
> Greg Crawford
> Knoxville, TN
>
> 1977 Royale, rear bath
> Quad bags, brand unknown
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Your are correct about the positions of the switch. Yes, in auto it should raise or lower to the height set by the link.

You should block the back and then adjust the front torsion bars according to the maintenance manual.
Then you can adjust the links for the auto feature.

Emery Stora
77 Kingsley
Frederick, C

>
> Emery:
>
> Thank you for your reply.
>
> I first checked the height under the frame using the 8-7/16 dimension, which I believe corresponds with the 11-11/16" dimension to the top of the
> racetrack hole. Once I had the frame at that level, I measured the beltline trim. This way I could use the beltline dimension to check the other side
> without getting down on my hands and arthritic knees.
>
> My switch works fine in two positions. It's just labeled with AUTO in the middle spot like a three position switch. So I guess the correct
> nomenclature is actually Top Position= HOLD, and Bottom Position= AUTO/TRAVEL?
>
>
> So am I correct to assume that if I select AUTO/TRAVEL the coach should automatically move up/down to the factory recommended ride height?
>
> I would bet large amounts of money it won't do that, so if not, does the solution lie in the adjustment of the links on the travel height valves?
>
> My coach is 1-1/2" low in the front, so I will be adjusting the torsion bars in my immediate future.
>
>
> --
> Greg Crawford
> Knoxville, TN
>
> 1977 Royale, rear bath
> Quad bags, brand unknown
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Fairly simple solution is to CAREFULLY measure the distance from the
concrete floor to the center of the rear frame slot, and set the ride
height at the specified height. Then measure from the bottom of the frame
to the floor and cut a piece of 2 x 2 or similar to that length on the
passenger side. The drivers side is a bit more complex, because of the
frame reinforcement for the on board generator. Measure the thickness of
that reinforcement and cut a second 2 x 2 to that length. Paint the sticks
different colors to identify which is which, and put them under the rear
frame directly under the slots. Raise the ride height with the air system,
put the cut sticks under the frame. And lower the air bags until the frame
just kisses the tops of the sticks. Then block the bogie castings so they
cannot move, and adjust your ride height turnbuckles so that is your ride
height when your compressors stop. Todd is absolutely correct about
measuring to the belt lines. They are not close enough to the
correct height to use. We have measured coaches at enough rallies to know
that very few coaches are correct. Nearly every coach we see is too low in
front, and uneven to boot.
Jim Hupy
Salem, Oregon

On Thu, Jul 30, 2020, 8:29 AM Todd Sullivan via Gmclist <

> Greg,
>
> Before you can measure from the belt line you would need to measure from
> the frame to the ground on each side and then measure the belt on each
> side. There are too many variables between the body/frame and belt line
> moldings to assume the distance is constant across sides. You will need to
> verify both sides in the rear are set to the correct height(hence the
> suggested four by four chunks for the left and right rear) prior to any
> adjustment on the torsion bars.
>
> Sully
> Bellevue wa.
>
> On Thu, Jul 30, 2020 at 6:14 AM Greg Crawford via Gmclist <

>
> > Emery:
> >
> > Thank you for your reply.
> >
> > I first checked the height under the frame using the 8-7/16 dimension,
> > which I believe corresponds with the 11-11/16" dimension to the top of
> the
> > racetrack hole. Once I had the frame at that level, I measured the
> > beltline trim. This way I could use the beltline dimension to check the
> > other side
> > without getting down on my hands and arthritic knees.
> >
> > My switch works fine in two positions. It's just labeled with AUTO in the
> > middle spot like a three position switch. So I guess the correct
> > nomenclature is actually Top Position= HOLD, and Bottom Position=
> > AUTO/TRAVEL?
> >
> >
> > So am I correct to assume that if I select AUTO/TRAVEL the coach should
> > automatically move up/down to the factory recommended ride height?
> >
> > I would bet large amounts of money it won't do that, so if not, does the
> > solution lie in the adjustment of the links on the travel height valves?
> >
> > My coach is 1-1/2" low in the front, so I will be adjusting the torsion
> > bars in my immediate future.
> >
> >
> > --
> > Greg Crawford
> > Knoxville, TN
> >
> > 1977 Royale, rear bath
> > Quad bags, brand unknown
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Thanks everyone for the replies. I will do as suggested. I should have known that the beltline trim would not be accurate.

Since it took about 10 minutes to raise one side, I would think it's probably time for a new compressor.

Thanks again.
--
Greg Crawford
Knoxville, TN

1977 Royale, rear bath
Quad bags, brand unknown
 
You can easily rebuild your compressor. The kit comes with new piston and rings. When you clean the inside of the cylinders do it with fine wet or dry sandpaper Do it wet. You will get better speed than with the suggested scotch right.

Emery Stora
77 Kingsley
Frederick CO

>
> Thanks everyone for the replies. I will do as suggested. I should have known that the beltline trim would not be accurate.
>
> Since it took about 10 minutes to raise one side, I would think it's probably time for a new compressor.
>
> Thanks again.
> --
> Greg Crawford
> Knoxville, TN
>
> 1977 Royale, rear bath
> Quad bags, brand unknown
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
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