Leveling a class A

If it is a DP then the ride leveler valves and bags can fix it. Freightliner checks and corrects at their factory shop in Gaffney

1.75%

Interesting problem. I like Yaj's answer, but I need a bit of clarification.

What exactly is the 1.75%? An angle? A percentage of the drop in inches from the front axle plane? I can't quite wrap my brain around that percentage number.

1.75% is 1.75 feet rise or drop per 100 feet of run. A 20' wheelbase would mean .35 feet or 4.2" difference.

2oldman wrote:
Interesting problem. I like Yaj's answer, but I need a bit of clarification.

What exactly is the 1.75%? An angle? A percentage of the drop in inches from the front axle plane? I can't quite wrap my brain around that percentage number.

A clinometer (or inclinometer) gives the slope. The angle would be the inverse tangent of the slope.

A general formula for this type of problem is:

wheel base times sine(inverse tangent(slope)), where slope is written as a decimal number; for example 1.75% would be written as 0.0175.

With a decent scientific calculator, for this problem, one would enter

20 * sin(invtan(0.0175))

That will result in .349946

The units will be the same as wheel base - feet in this case.

Multiplying by 12 will change to inches.

Tom

Holy******we have to do math? Well our Mh may never be level..lol.

pulsar beat me to it. That's exactly what I was going to say. :)

hoss,
This may seem like a dumb question but, are we talking about leveling WHILE DRIVING or, while parked? If driving, then as been stated, a DP would/should self level. But, if parked, drive up on something high enough to take care of the problem. If driving and your rig is a gasser, then you'll need some suspension augmentation or, adjustment of some type.
Scott

Cool thanks. So it appears Yaz is correct.. as are you others.

Pulsar - exactly the answer I was seeking. The goal is to use the clinometer and some math to level the coach on boards then use the jacks for stabilization. How high off the ground is certainly a safety consideration.