Classic cars forum & vehicle restoration.
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Vintage Fly Guy
Joined: 27 Jun 2024
Posts: 207
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 Posted: Tue Apr 28, 2026 9:12 pm Post subject: |
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| Rootes75 wrote: | So, after all, its turns out that the Brake master cylinder is actually a Clutch Master Cylinder.
The lorry was used by a Rootes Dealership in the 40s/50s/60s and apparently during that time the original Lockheed 1" Brake master cylinder was replaced by a 1" bore Lockheed Clutch Master Cylinder.
As its been on there for the last half a century or so and all the pipework and brackets are modified for it we are have sourced a replacement and will go from there. |
Well, just goes to show that ingenuity (or ham-fisted gibbonry, you decide!) will live on long after the original perpetrator has hung up their spanners! Are you putting it all back to 'factory spec' or replacing modified like-for-like? Either is part of its history now, so as long as the modification was safe and worked well, then who are we to pick sides? |
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Rusty
Joined: 10 Feb 2009
Posts: 301
Location: Bunbury, Western Australia
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| Posted: Wed Apr 29, 2026 1:13 am Post subject: |
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| A lot of times the only difference between a brake and clutch cylinder is the fitting of a residual line pressure valve on the brake cylinder, it's not uncommon to find them fitted that way, especially on Lockheed cylinders. (at least it's not uncommon in country Western Australia) |
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Rootes75
Joined: 30 Apr 2013
Posts: 4270
Location: The Somerset Levels
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| Posted: Wed Apr 29, 2026 8:09 am Post subject: |
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Well, the cylinder is roughly a third of the price of the original, and I would have to re-pipe to accommodate the the original back into the system so my plan is to replace with what's been on there for the last few decades.
I mean, it works. It was modified to take it by a Rootes dealership so I presume this might have been a 'get around' back in the day.
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Various Rootes Vehicles. |
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Rootes75
Joined: 30 Apr 2013
Posts: 4270
Location: The Somerset Levels
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| Posted: Mon May 18, 2026 12:56 pm Post subject: |
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We got hold of a new Master Cylinder through Powertrack brakes, we fitted it on Saturday and bled the system through thoroughly....
There's a but...
Still no pressure in the pedal, nothing. We then tried the handbrake and that pulls fully up with no pressure and I led under while it was pulled and the rear brake tree barely moves...
We have a show next weekend so that's now a no go...we will have to get her out the shed and remove the rear wheels and drums to see what is not moving or out of place.
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Various Rootes Vehicles. |
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