Best Option for Replacing 85841 Master Cylinder on Atwood Drum Brake Actuator

Question

Question:

Will this work in place of an attwood part number 85841 1990 trailer.

asked by: Tony H

0

Expert Reply:

The Replacement Master Cylinder Assembly # T4395100 will not work to replace your Atwood master cylinder model 85841.

Since replacement parts for your actuator are obsolete, your only option is to replace the entire actuator assembly. The Demco Hydraulic Brake Actuator # DM72VR is the closest one we have to replace your Atwood 6K actuator. You can install part # T4748800 to add an electric lockout, which would be an upgrade from the manual lockout on your Atwood.

expert reply by: Carla M

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Answer 1

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 2

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 3

The best recommendation I can give you since we don't carry the Gabriel actuators would be to check out the link I attached that will take you to a page that has all of the actuator shocks we carry. On the product pages for each there will be…

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Answer 4

Since we can't get the Atwood replacement shock anymore that you mentioned your best option would be to replace the actuator with a more reliable one like the Demco #DM72VR for if you have a drum brake setup or part #099-175-20 for if you have a…

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Answer 5

Since replacement parts for your actuator are obsolete, your only option is to replace the entire actuator assembly. The Demco Hydraulic Brake Actuator #DM72VR is the closest one we have to replace your Atwood 6K actuator. Since your current actuator…

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Answer 6

You are correct that the Atwood 85841 master cylinder that you referenced has been discontinued since Atwood's acquisition. There are not any direct replacement parts that are compatible at this time. Since Atwood is no longer in the actuator…

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Answer 7

We no longer carry the Atwood master cylinder you are looking for so your best option would be to replace the coupler. The coupler you have is the most problematic one we see by far so going to a better design will be your best long term solution. To…

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Answer 8

The closest option we have to replace your Atwood 82543 actuator is part #DM72VR, which is the item you referenced. However, this actuator doesn't have the lockout like your Atwood does. For a lockout use #T4748800 as an electric lockout. It…

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Answer 9

What I recommend, if the trailer has round axles, is an over-under conversion kit. For 3 inch round axles use #K71-385-00 and for 2-3/8 inch round axles use #K71-384-00. This of course will only work if the leaf springs are mounted to the bottom of…

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Answer 10

Absolutely, the Dexter leaf spring part 072-098-00 is a double eye spring, designed for 7,000 lb axles, with a 25-1/4" eye to eye measurement. The closest leaf spring we have to that is the Double-Eye Spring part #SP-198275 which is a double eye…

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Answer 11

All you should need on the fifth circuit of your 5-way is a 12 volt signal to activate the reverse lock out. Have you used a circuit tester like part #PTW2993 to verify you have 12 volts on that pin? Looking at the condition of your 5-way it is also…

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Answer 12

Hey Ryan, The Demco Hydraulic Brake Actuator #DM72VR is approximately 18-1/8" long and 6" tall (9-1/4" if you include the height of the breakaway lever).

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Best Option for Replacing 85841 Master Cylinder on Atwood Drum Brake Actuator

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