Leveling valve height fld120

97 FLD120 manual says it depends on your axle mounting but will usually be 2 5/8 measured from the bump stop to bottom of the frame.

 

I actually dont know, didn't think there were other setups, I think I remember reading that anything above 2 1/4 would keep the drive line from getting getting damaged, dont quote me on that though, the book says 2 5/8 or cycle the suspension and set it at the midpoint of travel, then check 5th wheel height is within tolerance of standard. Mine doesn't have driveline vibration and it's set at the 2 5/8 give or take a quarter. I've got rt40-145 axles so if you've got the same dont see them being mounted any differently.

 

That’s what I always set mine at. One a 99, current 2001, both air liners. I’ve always been told 2.5-2.75” top of stop to bottom of frame, on front axle, right side. Couple yrs ago, I was told front axle left side. I checked both sides last time. I think they were off a bit. I’m going to be checking it before Monday, anyway. New shocks etc.Youll know if it’s off,it will ride terrible. Too low, it will grind while coasting, too high it will make a grinding or almost an occasional snapping or binding noise through the gearshift.Re check it after a test drive, also. I had trouble, last time, as it would be higher, after driving. Decided to set it one last time, before replacing valve. It stayed put.The difference when it’s off, is huge, along with bad shocks, Mine, liked to beat us to death, last trip home, Lol, when it’s right, rides like a Cadillac, well maybe a Lincoln, or a Buick.Loading our Tues. Couple new seats, we’ll be floating.

 

Don’t get Moroe shocks either. They’re gas charged. Once they leak out they’re done. Original from dealer or even Gabriel’s are better. I was short one steer shock, ended up putting Monroe’s on steer. As that’s all they had. But I know they won’t last long. They were cheap enough, but will replace with original Freightliner, black shocks, very soon, I’m sure. I’m curious how it will ride, with gas charged on steer only. Last set of Monroe’s rode good for about 3 mos. if that. After 1 yr. all six were completely gone.

 

Now that I think about it. The Monroe’s I put on the front are black, not the yellow gas charged ones. I haven’t used them before. Always yellow gas charged. I think Monroe’s have a larger diameter piston, according to them. The black ones may be ok

 

Well She’s riding very well, now. Didn’t check height, but looking at airbags, I can tell it hasn’t moved. Still at 2 5/8” Had to make a better height rod for cab A/R as original has always been a little short. All metal from ACO. All new shocks, that’s where it’s at.Like Butter!! Had to do something with the frame, not the greatest. But better than nothing. Got all the tools out of side box. That helps too. Cab would bottom out, sometimes. Lol. Front Monroe’s seem to be good, Time will tell.