I'm a new member of the Fuso owner's club having bought a 99 FG in North Carolina and I'm driving it home to Denver. It has a service body on the back and some lube oil tanks (probably almost empty) so there is not much weight on the truck. It was giving a pretty harsh ride and I remembered a comment here by someone who bought one and reduced the tire pressure on the ride home to soften the ride. I checked the pressure in the rear duals and they were at 70psi. I reduced them to 60 psi and the ride improved pretty significantly. I'm wondering what the lowest safe pressure is with essentially no significant load on the back. The manual says 80psi lbs for load range E tires, which is what is on the truck. But even at 70psi it felt as if the back of the truck was bouncing up over the interstate cracks.
I've done nothing to the front tires, but I assume keeping them at spec would be appropriate, or could they even be reduced with no load on the truck? The manual calls for 65psi for load range D tires on an FE 639 with GVWR at 11,600 lbs. Mine is the 12,000lb GVWR.
I've done nothing to the front tires, but I assume keeping them at spec would be appropriate, or could they even be reduced with no load on the truck? The manual calls for 65psi for load range D tires on an FE 639 with GVWR at 11,600 lbs. Mine is the 12,000lb GVWR.
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