Switching Master Cylinder in DA66B to Convert to Disc Brakes

Question

Question:

I am converting my boat trailer from drum to disk that currently does not have a reverse lockout, only running a 4 pin connector. Will this replace my current master cylinder in a demco da66b and work?

asked by: David R

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Expert Reply:

Yes, you can swap out the master cylinder in your DA66B to convert to disc brakes. Since it does not have a reverse lockout, you actually want the # DM5919 instead of the # 5672. The # DM5919 comes with an inline solenoid. You will also need a 5-way for your trailer # HM47910 as well as an adapter for the vehicle side # C57187.

expert reply by: Robin H

0

Answer 1

Yes, there are replacement master cylinders for surge brake actuators like the Demco Actuator part #DM8203102 that you referenced. If this was the actuator that you have you would want the Replacement Master Cylinder #5672. If you have a different…

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Answer 2

For you Demco Kar Kaddy SS tow dolly the correct replacement master cylinder is the part #5672.

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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

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 6

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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Answer 7

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 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

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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Answer 10

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 11

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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Answer 12

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Switching Master Cylinder in DA66B to Convert to Disc Brakes

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