Options For Replacing Obsolete Atwood Brake Actuator With Bad Master Cylinder 1-71

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Question:

I need to replace a Atwood brake master cylinder model no. 1-71. Is there a replacement part available or a rebuild kit? Thanks. John

asked by: John

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Expert Reply:

I have a complete replacement actuator option, but unfortunately as Atwood went out of business years back there is no replacement master cylinder nor rebuild kit available.

Instead a replacement actuator like the # DM72VR if you have drum brakes or # DM62VR if you have disc brakes is going to be the only option. Both of these options have a 2" ball, 7,000lb capacity, and fit the common 3" wide trailer tongue. If you have a different size tongue just let me know.

expert reply by: Samuel C

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Answer 1

The Surge actuator you currently have installed is an older Atwood model. The cap for the brake fluid confirmed that for me once I saw it. Problem there is that Atwood is no longer in business and no replacements are available, unfortunately. We do…

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Answer 2

There isn't a master cylinder replacement we can offer that will fit an Atwood surge coupler since Atwood had a unique design and unfortunately isn't around any more. Best solution is a new actuator like the part #DM72VR for drum brakes or…

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Answer 3

Actually you can add an electric lockout to the Demco actuator part #DM72VR pretty easily with the part #DM5836 and you'd be set!

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Answer 4

The Reverse Lockout Solenoid Kit #DM5836 is the correct kit needed for the Demco Hydraulic Brake Actuator #DM72VR. This kit will allow you to install the solenoid without drilling into your master cylinder. I linked an installation video below. If…

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Answer 5

Thanks for the kind words, happy we were able to help, and the photos are also appreciated! As for the actuator, you are correct that the Atwood 85736 master cylinder is no longer available because Atwood was bought out so your best option is going…

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Answer 6

I have attached for you below a photo which shows the bolt pattern for the Demco Hydraulic Brake Actuator part #DM72VR.

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Answer 7

Email me back with them and I can see what would work best.

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Answer 8

The Demco Hydraulic Brake Actuator #DM72VR will replace your Atwood 171 actuator. This surge brake actuator will work for drum brakes and has no reverse lock out but is recommended that you equip your trailer with free-backing brakes so you can drive…

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Answer 9

I've never heard of an actual third brake light connector on a camper shell to plug in on a truck and we don't carry any parts to do that. The light generally needs to be hardwired into the truck's brake light circuit. The issue with this…

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Answer 10

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 11

The two sizes you mentioned are pretty similar and fit many of the same 15 inch wheels. The 205/75-15 fits rim widths of 5 inch to 6-1/2 inch whereas the 225/75-15 fits widths that are 5 inch to 6 inch. The 205 is 27.1 inches tall and the 225 is 28.4…

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Answer 12

Since you have a wheelbase/axle spacing of 38 inches the correct hanger kit for slipper springs would be the part #HAP-105-205-01. And then for a 7k trailer axle the u-bolt kit you'd want would be the part #APUBR-8. I attached the diagram to use…

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Options For Replacing Obsolete Atwood Brake Actuator With Bad Master Cylinder 1-71

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