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Old 09-20-2018, 11:26 PM   #1
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Default Conversion from Spring to Air Suspension: Locating Salvage Parts

I have a 2004 Ford F650. Under CDL ie 25,999. Box truck going through conversion to Car Hauler/RV-Lite

My understanding is that chassis-wise 2000-2015 F650/F750 and International 4000 series were made on the same line, different trim and engines. It seems that Hendrickson made the air suspensions for these if they were so equipped.

Other than Vander Haag's website, I've had a very hard time finding suitable cores. I have to imagine that the set ups for single or dual axles on a semi that are rated for 40-50,000 are not what I want, rather the ones meant for the back of a box truck, rated at closer to 20,000.

Any great websites or locations I should be calling? My gut tells me that there will be MUCH less labor if I find a set up that went on these chassis. In other words, they are more or less pre-drilled to accept the different suspensions. The shop I'd tentatively use says it takes close to 10 min to drill out a new hole, I can see labor charges for drilling all new mounting holes to rack up quickly.

Anyone go through a swap like this? Advice on kits or hardware for the front axle to go to an air suspension?

Thanks in advance.
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Old 09-23-2018, 03:52 PM   #2
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Actually, the 17000lb, 19000lb, 21000lb suspensions were all just about the same. On a 3 axle tractor you have 2-20000lb suspensions. Your air suspension doesn't really matter how heavy duty it is as long as it has enough capacity. If you need 17000lb and you get 23000lb suspension, because it is air suspension, it will ride the same as a dedicated 17000lb suspension.
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Old 09-23-2018, 05:01 PM   #3
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Quote:
Originally Posted by TomRC View Post
Actually, the 17000lb, 19000lb, 21000lb suspensions were all just about the same. On a 3 axle tractor you have 2-20000lb suspensions. Your air suspension doesn't really matter how heavy duty it is as long as it has enough capacity. If you need 17000lb and you get 23000lb suspension, because it is air suspension, it will ride the same as a dedicated 17000lb suspension.
That makes sense in terms of lbs....

But geometry of arms and shock settings etc I would expect to be designed for the long wheel base I have....not the rear of the semi.
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