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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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| | | Forums66 Topics126,780 Posts1,039,295 Members48,100 | | Most Online2,175
Jul 21st, 2025 | | | | Joined: Sep 2006 Posts: 1,972 Big Bolt Forum Co-moderator | | Big Bolt Forum Co-moderator Joined: Sep 2006 Posts: 1,972 | Are the master cylinders for the big trucks the same as the smaller trucks, except for the hydro-vac?
A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton | | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,189 | NO, they are not the same...the bore is larger on the bigger trucks. Mike B  | | | | | Joined: Feb 2010 Posts: 466 'Bolter | | 'Bolter Joined: Feb 2010 Posts: 466 | You can check out the master cyls. in the Chevy's of the 40's catalog. I just got a catalog free in the mail and the master cyls. are fairly reasonable, I thought. | | | | | Joined: Feb 2004 Posts: 28,675 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,675 | The big bolt MC has to be "fail safe"- - - - able to move enough volume of fluid to apply all the brakes, with or without the Hydrovac working. That requires a bigger bore and a longer stroke than the pickup cylinders.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2016 Posts: 264 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 264 | I ended up have mine drilled and sleeved with stainless, probably outlast me. Very reasonable at a local shop, | | | | | Joined: Mar 2007 Posts: 173 'Bolter | | 'Bolter Joined: Mar 2007 Posts: 173 | These might be useful - for my 55 second series.
MASTER CYLINDER REBUILD KIT - UP33 - NAPA
MASTER CYLINDER - M21698 - AMAZON | | | | | Joined: Dec 2018 Posts: 2,451 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 2,451 | 52vff Don't try this at home ,I was wiring at a commercial oil field powder coat shop had the worst pitted wheel cylinder I had blasted and powder coated inside. Then Sunnen precision honed it back to size,it is still running on one of my storage rigs I use to keep brakes and driveline stuff alive. Now I don't know if domestic powder coat would work. There coating is used to protect oil field fittings from vicious downhole fluids in injection wells. .02 cents | | | | | Joined: Jan 2016 Posts: 264 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 264 | Precision machine is sent out by me. I can do a lot but high precision or safety equipment is best left to pros in my book. Unless they come to me and we work together. .. | | |
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