| Re: [GMCnet] Dave Lenzi's modified upper A arms to increase caster. [message #328351 is a reply to message #328349] |
Wed, 17 January 2018 12:33  |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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Bob, an easy way to check for bent bogie arms is to jack up the rear of the
coach under the bogie boxes, and remove the wheels and tires. Then, use a
long accurate straight edge and hold it firmly against the mounting flange
where the studs come out on the rear bogie arm. Then look at the forward
bogie flange where the straight edge meets the flange. It should sit
squarely across the flange. If there is a gap on the front and not on the
rear of the flange, then the arm is bent towards the frame of the coach, or
towed in. Opposite gap would be towed out.
Bending is the remedy. If there is slop in the bushings, there is
wear, and the pins and bushings need to be serviced.
Jim Hupy
Salem, Or
On Jan 17, 2018 10:05 AM, "Bob Dunahugh" wrote:
>
> Gerald Works. Thanks for the wakeup call. I've been aware of what you
> brought up. And on this latest 78. Just haven't thought of the rear as much
> as I should have. I had checked for rear pins condition by the pry bar
> method. And have paid close attention to how the coach handled as trucks
> passed by for rear steer. But I failed to check rear alignment. A few years
> ago I had the opportunity to drive an extremely low mileage 78. It handled
> like a new car. Ours now drives very close to perfect. Just not there yet.
> I just might have a slightly bent rear arm. Or as I said. The rear pins
> FELT good. I need to pull the arms/pins, and mic those parts. ( GREAT. More
> to take apart ) Thanks again for the wakeup. Bob Dunahugh. 78 Royale
>
> ________________________________
> From: Bob Dunahugh
> Sent: Monday, January 15, 2018 11:59 AM
> To: gmclist@list.gmcnet.org
> Subject: Dave Lenzi's modified upper A arms to increase caster.
>
> This replacement 78 Royale drives better then our last one. I pulled
> Dave's knuckles, relay arm, idler arm, and the new steering wheel slip
> joint out of the burned Royale. Plus the upper A arms that had the offset
> rubber bushings installed. Already installed the knuckles. Not the relay,
> idler arm, or slip joint yet. Thinking of putting in the reworked A arms
> that Dave makes. Caster is extremely important for having the GMC drive
> perfectly straight. His pair of A frames are about $750. Thinking that
> I'll order some from his next run later this year. Any input out there?
> Bob Dunahugh. 78 Royale
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