Trailer Spider Plate Replacement

What this service covers

The brake spider carries the brake shoes, anchor pins and camshaft support at the wheel end. When the spider is worn, cracked or damaged by a wheel-end failure, brake performance and component life are affected even after new brake parts are installed.

Replacement spider plates are supplied in 4707 and 4710 brake configurations for compatible commercial trailer axles. The correct plate is confirmed by inspecting the existing brake setup, the S-cam configuration and the axle-tube measurements — never by the axle-tube diameter alone.

Common signs of damage

• Elongated or worn anchor pin bores
• Cracks around the spider mounting or camshaft area
• Brake shoes that will not sit square on the anchors
• Damage following a wheel-end fire or bearing failure
• Uneven or rapid brake lining wear at one wheel end

What technicians inspect

• Spider plate condition, bore wear and crack indications
• Anchor pins, bushings and camshaft support
• Brake shoes, linings, drums and hardware
• Spindle and axle-end condition behind the spider

Information to provide with your request

• Axle manufacturer and brake size
• Brake configuration if known (4707 or 4710)
• Axle-tube outside diameter if measured (commonly 5 inch or 5¾ inch)
• Photographs of the brake assembly and spider mounting
• Unit type, year, make and model

Northwest Axle Spindle is an independent service and installation company. We inspect and replace compatible components but do not manufacture them.

Repairability is determined after inspection. Northwest Axle Spindle does not promise that every damaged spindle or axle can be repaired — when replacement of the complete axle is the correct repair, that is what gets recommended.