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Front axle/knuckle


Damicoexcavating

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41 minutes ago, Damicoexcavating said:

Knuckle is still available buts it's pricey trying to find a cheaper alternative going into the off season

The larger issue here is, you're using a tractor with a 12,000lb front axle as a dump truck. The frame and axles are not designed for such loads. That's why your steering knuckle failed.

 

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You have an R688ST. "T" stands for tractor. Sales Engineering would never allow dump body fitment onto a regular R-model. The frame and front axle aren't up to the task.

Even if you go to a heavier axle, then the tractor frame is the weak link.

If you could upgrade to a 14,300 lb FAW538 front axle and springs, sure that would help. But it would be challenging to find one nowadays.

An RD688S is a 6x4 dump chassis. "D" stands for dump. The RD has a deeper and thicker frame rail.

 

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