trailer off tracking

Unless you're light and it is very windy, the trailer probably needs an alignment & may have some worn out parts.

Sometimes you can make them track better by turning sharply in the opposite direction of the off-track (if it tracks to the right, try a sharp left uturn).

 

I gotta agree, worn something.

 

If it has a sliding tandem CK. holes where you have pins set at the time you see it dogtracking, are the holes not round like others down the track, sometimes you can slide up a few holes or down a hole till you find some set of holes that are not as banged out and try it, look at ends of arms for rubber bushing hanging out of sides of arm where bolt holds it to frame?

 

agree with all these answers.
often I have been able to correct a trailer off-tracking by pulling the pins and sliding tandems several times from front-rear.

 

Ive seen trailers believe it or not where the kingpin is not exactly in the center. Mismatched tires ie. Xtra lease stuck a couple drive tires on there,one tire is too tall. But usually like they said slide up a few holes helps.

 

Gonna sound crazy here, but check your mirror adjustment too before getting all rowdy with fixing something that may just be a perspective illusion due to your mirrors. Mirrors not lined up right will give the illusion that you're off tracking when you're not or if so by only an acceptable tad. An indication is when backed in perfectly parallel to a line on one side, but not the other, then you look and you are off just a tad overall - mirrors need tweaking. They are causing you to see "off". Just a suggestion. Requires two parking lines you are sure are parallel to check. Or a mirror check station. Some companies have them in their yards, but if yours doesn't: some time playing with the mirrors in a well marked spot can be really useful. Keep in mind, though; the closer to the back of the door you bring the mirror then angling it out will give you the most "straight back" view. Depends on what you want to see too. More traffic - straighter lines. It's a trade off. Just sayin. Might want to check your mirrors before cranking on a loaded trailer. Especially if you use the power mirror to help you see while backing. What you want to see backing is a different perspective than rolling down the road. Just an idea.

 

You may need your eyes checked?

 

I'm stuck with of those off tracking trailers now. Most of our freight is drop&hook, but not this week. All live loads/unloads. Figures...