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[GMCnet] Ride Height [message #39729] Tue, 07 April 2009 14:28 Go to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Someone with new side rails, with no ride height reference notches, just
asked me to measure the distances from those notches to the bottom of the
side rails. I hopes someone will save the information where I can find it,
here it is:



The front reference notches are in the front clip, just forward of the joint
with the side rails. It makes more sense to measure the distance from the
top of the notch to the bottom of the side rail behind the joint: That
distance is 3-1/4” So the specified ride height dimension should place the
bottom of the side rail at 9-7/8” +- Ό” from the floor (disregarding tire
size, pressure, wear, etc.).



The rear reference notches are specified as 40-3/8” aft of the mid-point
between the center and rear wheels on a 23’ coach or 56-3/8” on a 26’ coach.
I found the distance from the rear-most edge of the side rail, where it
joins the rear clip, to that notch to be 10-1/4”; I suspect it’s the same on
the 26’, but someone should verify that. The distance from the top of the
reference notch to the bottom of the side rail is 3-1/4” there also. So a
block under the side rail at about 10” forward of the rear clip joint should
be 8-7/16” +- Ό” to establish the correct ride height (disregarding tire
size, pressure, wear, etc.).



Personally, I’d prefer to adjust the rear ride height to have the Zerks at
the same height as the spindles. Then measure the floor-to-bottom-of-frame
height just behind the rear wheels. Add 1-7/16” (1-1/2” is easier) and use
that as the target for the front ride height at the bottom of the forward
ends of the side rails. That compensates for the differences in tire sizes,
thickness of new side rails, etc.



Ken Henderson

Americus, GA

GMCWipersEtc.com

’76 X-Birchaven



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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
 
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