Air suspension system and other nightmares

thomas g. warner

New member
Mar 24, 1998
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As I previously posted bought a 1976 palmbeach In March 1998 and have been
working on it every since to make it roadworthy. I would be generous in
calling it a white elephant. Although it looks beautiful, mechanically it
was a nightmare!!! Would not stop in a 40 acre lot, wallowed like a ship,
40 MPH top speed, and never shifted out of 2nd gear.

I am a retired engineer and have over 40 years experience with cars as my
main hobby(many Olds Toronados). The coach did not have much maintenance by
previous owners. Engine for the most part is done (now sounds and feels
like an olds 455)and I have been troubleshooting the air suspension system
(it leaked like a sieve and the compressor never shut off). Replaced the
connectors and some of the air lines (all available at my local truck
dealer), check valve(excellent solid brass one from Gateway)and made several
additions to make it work better. System now shows no pressure change
overnight and seems to work fine. If anyone is interested in knowing how to
troubleshoot the compressor and wet tank system to quickly find the problems
let me know and I would be glad to help.

Plan to change the system to an electro level later in the year, and am now
researching sources for solenoid valves etc. Anyone change from a power
level to an electro level system, and have any ideas???

Installed new KYB gas adjust shocks on all wheels yesterday and can sure
attest to the change in handling and control that it made. It is a different
handling coach. Very very nice addition. I believe that the shocks on my
1976 palmbeach were original by the looks of them. Now have to tackle the
steering damper tomorrow morning and replace it with a Moog SSD-55 unit so
can take it on the first trip tomorrow afternoon.

Still very anxious about this first trip of about 350 miles roundtrip. Does
everyone have visions of their coach breaking down far away from home and
having it towed back to the garage on the first trip???

 
The steering damper is standard equipment on GMC motorhomes. I think the
original was still installed on mine. there was no fluid in it at all. It
cuts down on a lot of road vibration that is normally telegraphed through
the steering. The truck rut you allude to is caused by the all radial tires
. I still have it to some extent. Have you checked your pittman arm and
steering box?

> April 24,1998
> Thomas Warner:
>
> Sorry I can't help you out on your problem, but perhaps you can explain
> the Moog SS-55 Steering damper and what you will gain from this
>installation.
> Will it help correct the "Truck Rut " steering problem so prevalent in GMC
> coaches? Since Purchasing my ''76 Coach last fall I have - added New Tires;
>Aluminum wheels ; Caspro steering gear box and steering shaft; front wheel
>bearings:( and all the front end components replaced) and a 6- wheel
>allignment - but this has not fully eliminated this steering phenomanen
>asssociated with
> the GMC drive. ( I have learned from experienced GMC owners
> that I should have purchased Bridgeman Tires- but that change will be 3 - 5
> years away).
> I will be interested in your answer:
>.
> Regards,
> Don Martin
> dvm22727
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