Rough ride

[cfd511]

Have a 2008 mack granite tractorwith mp 8. Been pulling a dump trailer behind it and when i have mulch in it rides smooth. Brought a load of RCA home today and felt like my insides were being bounced around I'm Seriously considerings selling the truck after this .I still feel sick from the ride home. i Have alot of other mack and its always been the heavier its is the nicer the ride.Anyone have any ideas . THe truck has 4 air bags on the rear.i checked the linkages for the ride height system and all seem to be attached and functioning . Please anyone have any ideas. 

 

[mowerman]

Wow that’s wild… my guess is you got too much air running into the bags . I’m sure others will chime in good luck 

[cfd511]

i hope one you knowledgable guys will have advice. im going to sell this thing if i cant figure it out. my insides still hurt. 

 

[Geoff Weeks]

No matter what suspension, how the load is distributed on the trailer make a much larger impact on ride than what the suspension type is.

For best ride, if a concentrated (dense) load, split in 1/2 and place 1/2 over front and rear.

For less dense, you'll need to place the load through out the trailer in order to get it all in.

Worse thing you can do is "belly load" a dense product, placing the load in the center of the trailer, it will ride like hell and that sound like what you have.

Doesn't matter what the product is, rock or iron, how load will make a big difference. 

The problem comes with a rear dump, where you wouldn't want to have the weight concentrated at the front and rear and try and dump it. In that case safety of unloading trumps ride comfort unfortunately. try to avoid mounding it in the center of the trailer.

In short it sounds more like the product being hauled, not the truck or trailer suspension.

Edited 5 hours ago by Geoff Weeks

[cruiseliner64]

Have to agree with Geoff on this one.I hauled end dumps for a few years and it really depended on who was loading the product.Best ride was got by loading from the rear tapering off towards the front to spread the weight evenly.Also the "mound" should be as close to the centre line of the trailer as possible.If its to one side even slightly the truck rode like a buckin bronto.Having the load centered on the trailer also made tipping much safer...

Paul