you have to spec a truck properly. It sucks that they make different heights but thats the way it is. I hope you get it worked out otherwise just crank down every trailer 5 or so cranks and hook it up. The exercise is good for you LOL
Air ride height/5th wheel height?
Discussion in 'Trucks [ Eighteen Wheelers ]' started by sgreer78, Nov 25, 2008.
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I know sometimes no matter what truck you drive you're gonna encounter an dropped trailer so long it just hits the tires and you gotta crank, and sometimes they're so high you could put the front of the trailer through the back of the sleeper and never even come close to the 5th wheels at all.
I'll get it straightened out. I think it's a few things: My truck has low profile 5th wheel, and the air ride height may be a tad off. We'll see. I'll measure this weekend if it's not too cold out. -
You can adjust your leveling rod. It's pretty simple. It will raise or lower your fifth wheel probably about 4 inches. Just make sure you don't lower it to much because it can bind up the drive shaft. Otherwise it's a pretty simple procedure. Should take you a few seconds.
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I noticed the very same thing on our Kenworth T600 and the biggest factor being the low profile 5th wheel, we ended up buying a higher profile frame for the 5th wheel and now we are up another few inches and no more problems,ours was so low i had to use a rod just to pull the 5th wheel handle to unhook, now i can reach in without getting my sleeves dirty, should work for you too.
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Yeah, but how much did you have to pay for a new frame for the 5th wheel?
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Actually the price on the new high rise wasn't that bad, jkust under $800.00 Canadian, look around at a wrecking yard or a truck shop and for a couple hundred get a used one and then your all set, i know there are some used ones around at our local wrecking yards.
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Air suspension procedure per Freightliner maintenance manual... I hope this helps
IMPORTANT: Before checking the AirLiner suspension
height, make sure there is no load on
the chassis, and the trailer is unhitched.
5. Park the vehicle on a level surface, using a light
application of the brakes. Do not apply the parking
brakes. Shift the transmission into neutral,
and build the secondary air pressure to at least
100 psi (690 kPa). Shut down the engine.
6. Mark the location of the front and rear tires on
the floor, and chock the tires on one axle only.
7. On single-drive rear axle configurations, measure
the distance from the bottom of the left axle stop
to the top of the U-bolt pad. On dual-drive rear
axle configurations, measure the distance from
the bottom of the forwardmost left axle stop to
the top of the axle U-bolt pad. See Fig. 7, Ref.
A. The correct distance for single and dual-drive
rear axles is from 2-3/8 to 2-7/8 inches (60 to 73
mm). -
do not adjust your supension out of the freightliner specs. if you do it will change your diveline angles and cause the synchro's in the trans to wear out and they it will whine and chatter like crazy. it will also cause premature wear of the u joints and possibly cause driveline vibrations.
You bought a truck with the lowest low profile tires you can get and a low profile fifth wheel and now you are wondering why it's low.... Makes sense. Basicaly you screwed up not knowing what spec you needed when you bought it. I'd suggest switching it to low profile 24.5's or putting a higher profile fifth wheel on it. Most companies will want a 47 to 50" fifth whel height but no matter what when you have many trucks droping trailers you will always have some that you need to crank down, unless you are the tallest one.
The shaker I'm driving is the same as yours and I have to crank allot of trailers down and I know him much it sucks -
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same i have problem if u have any idea just me know but i changed the air control valve now i dont know how much height i have to keep dealer says 2 5 8
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