Home > Forum > 5th Wheel Movement

5th wheel movement

Dec 20, 2019 at 07:39 PM CST
+ 1

First load on a new truck - Red Winter Wheat - with 40' Hopper, 5th wheel is fixed, Gross 77,360 - Steer 10,260 - Drive Axle 33,360 - Trailer Axle 33,720.

I've got 3 holes available to move the 5th wheel forward; distance from center of bolt to center of forward hole is 6".

Wheel Base 198", Distance Front Axle to Kingpin 15' 2, Kingpin Rear Axle of Trailer 36' 4" current measurements.

I'm thinking move it the full three holes. Opinions, suggestions welcome.

Replied on Mon, Dec 23, 2019 at 09:10 AM CST

If you don't want to do the moving, maybe try loading a little lighter in the back and increase what you put in the front. Just a thought.

Replied on Mon, Dec 23, 2019 at 03:39 PM CST

Just wondering have you considered how much fuel you have on 100 gallons of diesel weighs 720 lb so if you have 200 gallons on you got 1440 lb of weight but fun anyway how much fuel do you have on when you have this load

Replied on Mon, Dec 23, 2019 at 05:00 PM CST

John - I only have an 80 Gallon Fuel Tank - I was around 1/2 - Tare weight was 23,440.

Kevin - Couldn't change the wieght on the front axle by more than a 100 lbs. adding/subtracting from hoppers.

I moved it ahead the three holes; 15/16" Socket 1" Drive, with same size wrench, and about an hour of work.

Hard part was under the middle of the 5th wheel had to use two wrenches, a pipe wrench as an extension works wonders for us old guys.

Will be loading Canola Meal on Thursday, I shall let you know the results.

Replied on Tue, Dec 24, 2019 at 07:05 AM CST
The center of the fifth wheel or head , should be just forward of the center of the tandem , end of story , 6 inches is good 8 inches is to far forward , this offers a better ride and prevents the rear rear axle tires from wearing much faster than the the forward rear axle , like the man said , load more on the nose of the trailer ,
Replied on Tue, Dec 24, 2019 at 08:20 AM CST

Ok,good . Keep us informed.thanks

Replied on Tue, Dec 24, 2019 at 10:55 AM CST

PBT - Thank You for details, I will be sure to keep a close eye on wear patterns of the drives.

Best scenerio is to budget for a sliding 5th. Also, the trailer was loaded to the brim in the front 3/4 of hopper.

Replied on Wed, Dec 25, 2019 at 01:24 PM CST
Originally Posted by: GL BREWER
Quote: "PBT - Thank You for details, I will be sure to keep a close eye on wear patterns of the drives. Best scenerio is to budget for a sliding 5th. Also, the trailer was loaded to the brim in the front 3/4 of hopper."

I would keep an extra close eye on the bolts you reused. Not good to use stretched bolts for something as critical as that. Good luck
Replied on Wed, Dec 25, 2019 at 01:24 PM CST
Your 5th wheel should be positioned so that when you are 34000 on your drives you are 12k on your steers. Most will transfer 200-250 pounds from drives to steers per hole on the 5th wheel. Set back steers pick up weight better than forward set like those on long wheel base trucks.
Replied on Fri, Dec 27, 2019 at 07:00 AM CST
Originally Posted by: PBT PBT
Quote: "The center of the fifth wheel or head , should be just forward of the center of the tandem , end of story , 6 inches is good 8 inches is to far forward , this offers a better ride and prevents the rear rear axle tires from wearing much faster than the the forward rear axle , like the man said , load more on the nose of the trailer , "

Interesting. I couldn't figure out why my rear axle tires wore nearly twice as fast as my front axle. My truck has a fixed plate way over 6 inches. Its nearly on top of my front axle. I have a slider Im gonna put on when the weather gets warmer. Just curious would a pusher fix this?
Replied on Fri, Dec 27, 2019 at 09:57 AM CST

well you're supposed to have 34,000 on your drives and 12 on your steers so you got more than double the weight on your drive course you have a tires compared to 2 but anyway when you said they were down are they wearing even have you had three axle alignment done

Replied on Fri, Dec 27, 2019 at 09:59 AM CST

And yes a pusher axle to help distribute awaiting more would definitely help with this issue but still is you just going to have wear and tear when you're running around at maximum weight