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Old 07-09-2013, 06:35 PM
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NWMike NWMike is offline
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Possible to add electric brake bypass to drum brake '93 trailer?

I ordered the Trailer Buddy from Pacific Trailers that bypasses the brake line pressure when backing up but it shows a return line that only the disk brake actuator has. Any chance I could drill and tap my own return line to the reservoir? Anyone ever use one of these on an older drum brake trailer? I have to back up a pretty good incline and trying to keep the lockout piece in place drives me nuts. I can't ask someone else to bring my trailer back after launching if they have to go through this routine every time. I don't plan to go to disk brakes and if I have to get a new actuator I will but something tells me I can adapt what I have.
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Old 07-10-2013, 02:20 AM
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I cant speak towards adapting what you have, but I would think a simple tap into the brake fluid reservoir would allow the solenoid to work fine. I have the electric solenoid on my trailer and it works fantastically. I have never had a problem with the brakes when backing up.

Assuming you have a ufp tounge, it appears it will not work. Pacific Trailers website (http://www.pacifictrailers.com/UFP-R...p-Valve-34500/) says it only works with UFP Disc Brake Master Cylinder #34762. I dont know what lockout piece you have but the 2 options are this http://www.pacifictrailers.com/UFP-A...-Lockout-Cap-/ and this http://www.pacifictrailers.com/UFP-A...uator-backing/.

ORRR:
http://www.pacifictrailers.com/compl...B-35-actuator/ (get this one)
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Old 07-10-2013, 07:37 AM
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The return type disc brake master cylinder is supposed to work. I had installed one because one was sent to me by mistake when I ordered the standard one. Unfortunately the one I received was defective. So I made a custom clamp... took all of 5 minutes.. gotta love the grinder... and this one does not fall off.

[IMG][/IMG]



cost? - zero - have about 6 of these clamps...
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Old 07-10-2013, 07:41 AM
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If you use a C clamp to make it possible to back up your trailer .... you might be a redneck.
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Old 07-10-2013, 08:02 AM
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Quote:
Originally Posted by Traxx822 View Post
If you use a C clamp to make it possible to back up your trailer .... you might be a redneck.
That's me...
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Old 07-10-2013, 09:58 AM
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PO of our boat made one out of thick sheet metal. I would post a pic but ...


Still can't.

It snaps on and off easily.
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Old 07-10-2013, 10:23 AM
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Quote:
Originally Posted by SP Maristar View Post
PO of our boat made one out of thick sheet metal. I would post a pic but ...


Still can't.

It snaps on and off easily.
use photobucket to post photos... it's free
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Old 07-10-2013, 10:08 AM
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Possible to add electric brake bypass to drum brake '93 trailer?

If its a UFP assembly they do make a special cap that goes in the hole above where you add brake fluid.

You press the button and turn it thus locking out the brakes. When you go forward it automatically returns to normal braking position.

Maybe you already have this??? C clamps do a great job also.
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Old 07-10-2013, 02:17 PM
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NWMike NWMike is offline
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I think they say it only works on the disk brake version since it has a return line already on it. I think I'm going to go for it and add a return line to see if it works. Worst case, I'll get a new one. I had read somewhere that I cannot use a disk brake actuator on a drum system since it creates too much pressure. I'll post pictures (I guess once we're able to) of my process. Should be interesting.
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Old 07-10-2013, 04:43 PM
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NWMike NWMike is offline
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OK, I put a call in to Pacific Trailers, very helpful, and they said to try the version made by Titan, pa # 4748800 on their website. It's an inline valve that shuts off and does not have a return line. I have read that these were not the best way to go due to the pressure build up in the master cylinder. Once the gate is closed and then you back uphill or accidentally back into something, the excess pressure could damage the internals of the master cylinder. Part of me wants to modify what I have but common sense is saying to not experiment and risk the boat being down for awhile, especially in summer.
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