Orientation: how to connect your trailer using the Max Coupler hitch, common maintenance tips, and HOW TO BUY

The following video demonstrates how to hook up to a prepared vehicle using the max coupler hitch. See the notes below for how to install the max coupler vehicle side onto a Class 2 hitch mount and highlights of common maintenance tips.


You will need a hitch insert to suit your vehicle.   It is recommended to purchase an insert that will be dedicated for use with your Off Grid Trailer with the proprietary Max Coupler vehicle side mount.

Trailer hitch mount

The following tools are required:

36mm combination wrench

1 7/16"  combination wrench, or PREFERABLY a crescent style wrench with jaws that can open to 1 1/2" - this is to hold the nut on the bottom of the hitch while you tighten the bolt.


1/2" drive ratcheting socket handle or breaker bar

Either of the following:

19mm hex socket-1

3/4"  6 point hex socket, 1/2" drive (for bolt on late CU offroad couplers)


1 1/2" Socket, 1/2" drive (for bolt on early CU offroad couplers)

To install: make sure all slack in upper stack of bolt head, steel washer, delrin washer, coupler element, nylon washer, steel washer, and jam nut is taken up by having jam nut finger tight.   Install system onto hitch insert in the desired orientation.   Hold bolt head with appropriate tool and tighten lower nylock nut to 100 lb-ft of torque.     The coupler body should pivot on hitch insert with some resistance.  There should be no vertical free play in the system.     If you find resistance excessive ie: you cannot pivot the CU coupler by hand: loosen the nylock nut, carefully take some tension out of the upper stack by turning the jam nut counterclockwise a small amount, and retorque the nylock nut.   It may be helpful to do the final torque of the nylock nut with the trailer in place and a load on the hitch after mocking everything up - this will help prevent the jam nut from turning.

Max Coupler - Rear View-1Max Coupler - Side View

Maintenance Tips:

  • This coupler is required to be periodically lubricated with high pressure/temp all purpose grease - the manufacturer recommends the installation of "10 pumps" from a standard grease gun, before rotating the coupler several times for distribution.   
  • If the coupler is submerged or exposed to prolonged inclement weather, it's recommended that it be re lubricated to push out any water impingement.

Reference Links:

HOW TO BUY Replacement parts on our Off Grid Store

Canadian Customers

USA Customers

Bushing Replacement Instructions