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Fire Engine Brakes Question
#1066508 11/04/2014 8:09 PM
Joined: Apr 2011
Posts: 10
SLO CA
S
SLO52Fyrfighter
Offline
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SLO52Fyrfighter
New Guy
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Joined: Apr 2011
Posts: 10
SLO CA
I have a '52 GMC that has a cable-operated hydraulic brake valve at the end of the hydrovac unit. It is used when operating the fire pump. The knob is pulled at the dash, and the cable pulls the lever about 90 degrees. This "locks" the pressure in the brake system, providing a "parking brake" effect. The normal parking brake squeezes the drive line, which needs to spin for pumping the midship fire pump.

Question: What is this unit called, and how can I fix the leak from the shaft (comes out of the valve and has the lever attached to it. I am tired of losing brake fluid.

Thanks!
Re: Fire Engine Brakes Question
SLO52Fyrfighter #1066519 11/04/2014 9:15 PM
Joined: May 2005
Posts: 8,878
Lexington, VA
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Grigg Offline
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Grigg
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Lexington, VA
MICO makes the newer version of what you describe.
http://www.mico.com/products/lever-lock

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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Re: Fire Engine Brakes Question
Grigg #1066544 11/04/2014 11:47 PM
Joined: Apr 2011
Posts: 10
SLO CA
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SLO52Fyrfighter
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SLO52Fyrfighter
New Guy
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Joined: Apr 2011
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SLO CA
Thank you. I was looking at replacing it with the "cable lock" they sell, until I found out it retails for $990.

I'll try to find the right rubber seals and copper discs so I can repair it (hopefully).

I appreciate the help!

Moderated by  69Cuda 

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