From jpile1 at verizon.net  Thu Jul  3 11:10:54 2025
From: jpile1 at verizon.net (Jim Pile)
Date: Thu, 3 Jul 2025 15:10:54 +0000 (UTC)
Subject: [Rovernet] GIRLING Front Brake rebuild
References: <1207744131.1232451.1751555454933.ref@mail.yahoo.com>
Message-ID: <1207744131.1232451.1751555454933@mail.yahoo.com>

Folks,   I'm at the rebuild point of pressing the pistons back into the housing. In spite of lubricating both housing and piston with brake fluid, I can't seem to get the piston past the sealing ring. It gets stuck there, in spite of using a goodly amount of pressure. The manual of course states that it should slide in without excessive pressure, but I'm way past that point. Grooves were cleaned out, and sealing rings look as they should. Pressure has been evenly applied. So how do I convince the pistons to slide into place?  I performed this same task several decades ago, and don't recall this being a problem.
   Helpful tips would be greatly appreciated.

    Thanks,
        Jim Pile
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From sdibdin at gmail.com  Thu Jul  3 11:20:40 2025
From: sdibdin at gmail.com (Steven Dibdin)
Date: Thu, 3 Jul 2025 11:20:40 -0400
Subject: [Rovernet] GIRLING Front Brake rebuild
In-Reply-To: <1207744131.1232451.1751555454933@mail.yahoo.com>
References: <1207744131.1232451.1751555454933@mail.yahoo.com>
Message-ID: <97A048BE-5B1E-4AF8-8734-866AD4FADA30@gmail.com>

What sort of condition are the piston surfaces? If they have any slight roughness from corrosion they should be replaced. Also, they should have a lead in chamfer on the back edge. 

Best,

Steven

Sent from a small screen, please excuse any typos. 

> On Jul 3, 2025, at 11:11, Jim Pile via Rovernet <rovernet at rovernet.org> wrote:
> 
> 
> Folks,
>    I'm at the rebuild point of pressing the pistons back into the housing. In spite of lubricating both housing and piston with brake fluid, I can't seem to get the piston past the sealing ring. It gets stuck there, in spite of using a goodly amount of pressure. The manual of course states that it should slide in without excessive pressure, but I'm way past that point. Grooves were cleaned out, and sealing rings look as they should. Pressure has been evenly applied. So how do I convince the pistons to slide into place?
>   I performed this same task several decades ago, and don't recall this being a problem.
> 
>    Helpful tips would be greatly appreciated.
> 
> 
>     Thanks,
> 
>         Jim Pile
> _______________________________________________
> Rovernet mailing list
> Rovernet at rovernet.org
> http://rovernet.org/mailman/listinfo/rovernet_rovernet.org
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