Replacement Spindle, Brakes, and Hubs for Roadmaster Tow Dolly with Electric Brakes RM3477

Updated 05/08/2025 | Published 09/06/2021

Products Featured in This Question

Roadmaster Tow Dolly with Electric Brakes - 4,250 lbs

(9)

$3525.00

Replacement Driver's-Side Brake Assembly for Roadmaster Tow Dolly

(2)

$147.66

Replacement Passenger's-Side Brake Assembly for Roadmaster Tow Dolly

$137.75

Replacement 10" Brake Drum for Roadmaster Tow Dolly - Qty 1

(2)

$134.46

Replacement Spindle for Roadmaster Tow Dolly - Qty 1

(5)

$171.46

Question:

I have a 3-year old Road Master RM3477 car dollie. The passenger side brake drum, spindle, brake shoes are all bad. I would also like to replace the wiring and the relay mechanism. I belive thT the brake locked against the drum. The driver side appears okay. The spindle has the grease cert.

asked by: Don A

Expert Reply:

In regards to the Roadmaster Tow Dolly with Electric Brakes (RM3477) part # RM-2050-1, the correct replacement spindle is part # RM63FR, the correct replacement braking assemblies are part # RM-4701-R for the passenger side and part # RM-4701-L for the driver side, and the correct brake drum is part # RM43FR.

Unfortunately, we don't offer any relay harnesses for this tow dolly as they are not available as replacement parts so you'll need to re-wire this yourself or hire a professional.

expert reply by: Conner L