Correct Replacement Spindle Washer for Dexter 3,500LB Axle  

Yes, the Demco Hydraulic Brake Kit #40716-15 will work with your 13" wheels. I confirmed this with Demco.

The #8-247-50UC3-EZ and #AKHD-545-35-G-EZ-K will both fit and work with your 13" wheels. These are also compatible with the #40716-15 from your previous question. For the most part it comes down to cost between the two hub/drum assemblies.…

The overall length of the #80910 that you referenced is 13-3/4 inches from end to end. For a 17-3/4 inch flexible brake line instead we have the part #T4890700 instead.

Yes, there should be a washer of some type between the spindle nut and the bearing on your trailer. The washer protects the back side of the bearing from the edges and points on the back side of the spindle nut. There are several types of spindle…

While your spindle may have a diameter of 1-1/16 inch where the bearings ride the diameter where the threads are is actually 1 inch like what the part #5-23 that you referenced assuming you have a standard trailer spindle which it sounds like you…

The inner and outer bearing surfaces on a number 84 spindle are different diameters. The outer bearing will ride on a 1.00 inch diameter surface and the inner bearing will ride on a 1.378 inch surface. It sounds like you have the correct outer…

The correct spindle washer you would need is going to depend on what the spindle calls for. There are various washers we offer for various styles of spindles. For just a standard 1 inch washer we have the #SW1000. Of if you have an EZ lube style…

A brake actuator with a manual lockout, like part #T63FR, will have a lockout lever on the actuator that prevents the internal spring and shock from engaging the master cylinder when backing up (see photo). A no lockout brake actuator, like part…

I went out to the warehouse and measured the Demco Hydraulic Brake Actuator item #DM72VR. The bolt hole spread is 3". I have linked a diagram below. I have linked a diagram I made below and another one that will show you a few dimensions.

The Demco #DM72VR Hydraulic Trailer Brake Actuating Coupler would require four 1/2 x 4-1/2 inch grade 5 bolts to install it on a trailer tongue. I've linked to a product description video as well as a photo with the bolt spacing that you might…

Many smaller spindles do not require a washer. You can add one if you desire, but many spindles like the 2,000 lb Dexter axles do not come with a washer and don't require it. If you want to add a washer like #SW1000 it will not negatively effect…

A 3500 lb axle typically has a 1 inch diameter threaded portion. The #5-23 would be the correct D washer for your application.