Evolution Series Suspension Maintenance, Alignment, Operation & Troubleshooting - Including brake and hub

Installation & Alignment Procedures

This procedure describes the recommended fitment of the eccentric cam bolts and fasteners specific to the Evolution Series Suspension A-arms

Quick Reference

1. Loosen A-arm cam bolts
2. Align frame assembly and remove the locking fastener.  Utilizing the A-arm slot, check wheel alignment in both toe and camber directions (see below) and if necessary adjust by rotating the appropriate A-arm fastener to achieve the following (see below for Wheel alignment procedure):
   
3. Toe In/Toe out setting adjustment
   1. 1. The outer "wheel side" cam bolt is adjusted using a spanner to achieve the following factory SPEC:
         1. Toe In Factory Spec = 1/16" Toe in per side
   2. Camber setting adjustment
      1. The inner cam bolt is adjusted using a spanner to achieve the following factory SPEC:
         1. Camber Factory Spec = 0 degrees <-> +0.5 degrees 
4. Once settings are acheived
   1. fasten the two nuts on either A-arm to the following torque setting
      1. MUST DO: The Torque wrench must be applied to the NUT as the cam BOLT must not turn  
      2. 183 lb ft torque

Wheel Alignment Procedure

1. Place the trailer on a smooth level surface and, if possible, at typical operating load (weight).
2. Move the trailer forwards and backwards to eliminate twist in the wheels 
3. Toe in:
   1. Run a straight edge across the face of the tire and measure the distance from the straight edge to the frame outboard rail
      1. INSERT IMAGES
      2. 
      3. *note it is also possible to measure the alignment directly from the brake drum face to the outboard frame rail if the trailer is lifted with wheels removed.  This will not take into account gear load as mentioned above
4. Camber:
   1. using a digital level on the rim, set the camber to the above noted factory spec to avoid excessive tire wear (positive camber is where the top of the wheel is leaning away from the trailer)
      1. exact measurements will depend on the type and loading configurations 
      2. Camber alignment tool reference
         
   2. IF no level floor is available, calibrate the wheel face level but referencing 90 degree angle to the shop floor as outlined below.  
   3. IF a level floor is available proceed to Step d.

d. Level Floor utilize camber setting directly from wheel face.

Note that tire wear issues are NOT covered by the OGT manufacturers warranty and it is the responsibility of the trailer owner to verify camber and toe measurements as well as all torque specs outlined in the owners manual and above. 

A helpful guide is linked here as well!