How To Install A 2-5/16 Inch Hitch Ball To A Draw Bar That Has Limited Access to the Hitch Ball Nut

Updated 08/31/2020 | Published 11/29/2010

Question:

I want to replace my 2 5/16, 1 1/4 shank ball. The nut is recessed within what is essentially a box on the draw bar. There is not enough clearance within this box to get a wrench on the nut. It appears to me that the torque must be applied via the balls wrench flats rather than to the nut. Is this method of tightening acceptable and Is it possible to apply 450 ft. lbs. of torque with this method?

asked by: Randy G

Expert Reply:

It sounds like you might have the 2-5/16 inch hitch ball on a weight distribution head assembly which can limit the access to the hitch ball nut. The weight distribution head is bolted to the the shank that inserts into the trailer hitch. I am including a link to a picture of what a weight distribution head might look like to help you decide if that is what you might have.

To tighten the nut on the hitch ball you will need to use a 1-7/8 inch socket instead of a wrench. The socket should be able to fit on the nut and allow you to torque the hitch ball. I am sending a video link of a weight distribution system being installed on a vehicle. At the 1:40 mark of the video it will show you how our installer attached the hitch ball to the weight distribution head.

expert reply by: Jeff D

Norm J.

8/9/2020

Im doing the right thing with the Reese 66559. Concerned with the ball. Needed and ordered the 2 5/16 ball. Problems is if it takes 400 ft lbs to torque where do I get a torqe wrench with out paying $200 and most more than that. I dont even see a torque one on your company to cover 400 lbs. Any help?

Chris R.

8/20/2020

That is a high torque value and while we don't have any wrenches capable of that number, you should hopefully be able to rent/borrow one from a local auto parts shop. This is a good alternative to buying an expensive torque wrench that you might only use once or twice.

Norm J.

8/20/2020

@ChrisR Tried at 2 local good rv trailer dealers and they tell me that the highest they do is 150 lbs to torque the balls. Says that is all they can do.