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

Question

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

0

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

0

Juan

4/27/2025

What kind bearing they fit rm3477

Jesse M.

5/8/2025

@Juan That will be the following: Inner Bearing # L68149 Outer Bearing # L44649

Answer 1

Yes, we do. The correct bearing kit for the Roadmaster RM 3477 Tow Dolly item #RM-2050-1 is the Hub Bearing Kit item #BK2-100. For new bearing grease the very best choice is LMX Red. This formula withstands pressure, high temperatures and water…

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Answer 2

The best way to find the correct replacement bearings is to get the numbers stamped onto the metal of the inner and outer bearings that are currently on the trailer. With those you will be able to find the correct replacement bearings, races, and…

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Answer 3

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 6

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 7

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Answer 8

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

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Answer 9

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 10

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 11

Both the Roadmaster and Blue Ox tow bars are great options. But if it was my decision to make I would go with the Blue Ox Avail part #BX7420 as we have found that the Blue Ox tow bars are a little easier to connect and disconnect from. Also this tow…

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Answer 12

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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

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