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1957 Dodge convertible power top
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main-wire
Posted 2022-02-13 3:06 PM (#619367)
Subject: 1957 Dodge convertible power top


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What type of fluid is used in the power top system? I have heard it's automatic trans fluid but I want to make sure. I've installed new hoses. Some fluid ran out of the old ones. How do I replace the lost fluid? I assume I have to add it through the pump but I don't see a plug. Thanks for your help.
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ronbo97
Posted 2022-02-13 5:09 PM (#619372 - in reply to #619367)
Subject: RE: 1957 Dodge convertible power top


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IIRC, the plug is at the end. Also, what kind of fluid is presently in your pump. If it's red, it's ATF. If it's clear, probably brake fluid. Either way, add more of what's already there. Don't mix fluids.

Ron

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Powerflite
Posted 2022-02-13 7:27 PM (#619373 - in reply to #619367)
Subject: Re: 1957 Dodge convertible power top



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Brake fluid? I would expect it to use hydraulic fluid, which is different than both of those. But I don't know what they typically had in them.
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ronbo97
Posted 2022-02-13 8:32 PM (#619375 - in reply to #619373)
Subject: Re: 1957 Dodge convertible power top


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Powerflite - 2022-02-13 7:27 PM Brake fluid? I would expect it to use hydraulic fluid, which is different than both of those. But I don't know what they typically had in them.

Brake fluid would work. But they caution against it because it will remove paint if it leaks. And definitely not silicone brake fluid.

Hydraulic fluid is a good choice. My preference is transmission fluid, simply because it's easy to see in the translucent lines. So when bleeding the system, you can see if there is any air left in the lines.

Ron

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Windsor59
Posted 2022-02-15 7:07 AM (#619410 - in reply to #619375)
Subject: Re: 1957 Dodge convertible power top



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Hydraulic oil and automatic oil are similar. While brake fluid is one fluid does not merge with the others.

Edited by Windsor59 2022-02-15 7:08 AM
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big m
Posted 2022-02-15 12:27 PM (#619422 - in reply to #619367)
Subject: Re: 1957 Dodge convertible power top



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Use ATF. If it was filled with brake fluid prior to that, use denatured alcohol and flush the system before adding the ATF.

I had a friend with a Buick convertible that ruptured a hydraulic hose, and brake fluid sprayed over his car and ruined the paint. The ATF will make a mess, but nopt attack paint.

---John
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main-wire
Posted 2022-02-15 10:35 PM (#619442 - in reply to #619372)
Subject: RE: 1957 Dodge convertible power top


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Thanks, Ron. The fluid is red so I'll add ATF.
Wayne
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main-wire
Posted 2022-02-15 10:44 PM (#619443 - in reply to #619422)
Subject: Re: 1957 Dodge convertible power top


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Thanks, John. Last thing I want to do is ruin my paint. Most of it is original.
Wayne
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