How do I Perform a Dexter Trailer Axle Replacement?

Replacing a Dexter trailer axle involves a systematic process of preparation, measurement, and technical installation to ensure safety and alignment. The process begins with stabilizing the trailer on level ground using heavy-duty jacks and jack stands. Before removing the old axle, you must take precise measurements, including the hub-face-to-hub-face and spring-center-to-spring-center dimensions, to ensure the replacement part is compatible.

The removal phase includes taking off the wheels, disconnecting brake wiring (labeling colors like white for ground and brown for tail lights), and releasing hydraulic lines if applicable. After loosening the U-bolts and sliding out the old axle, the new Dexter axle is positioned according to the original frame markings. Key steps in the installation include:

• Aligning spring seats to a 1/16-inch tolerance.
• Securing grade-8 U-bolts and torquing them to specified levels (typically 45-50 ft-lbs initially, with final checks between 65-95 ft-lbs depending on the model).
• Reassembling hubs and brakes, ensuring hub nuts are torqued to 50-70 ft-lbs for 3.5K-7K axles.
• Lubricating bearings with approved NLGI 2 grease.

Final steps involve a low-speed test tow to check for unusual noises or vibrations and a final inspection of bearing play and brake contact.