What size socket or wrench fits the big nut that holds the wheel cylinder to the backing plate? Asking for a friend. 😉. Actually, I injured myself trying to get it off with a crescent wrench. 😥 It’s been 20+ years since I worked on any drum brakes…. Thanks!
Actually that big nut is for the brake shoe anchor pin used for major adjustment (centering) of the shoes. It's a 15/16" hex. Wheel cylinders are secured by two 1/2" hex head bolts. That's the sizes on my '51, which should have the same Bendix brakes as a 66 C10. Crescent wrenches are known for drawing blood.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Frank was probably using a metric Crescent wrench.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
Frank was probably using a metric Crescent wrench.
Yeah, that.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Actually that big nut is for the brake shoe anchor pin used for major adjustment (centering) of the shoes. It's a 15/16" hex. Wheel cylinders are secured by two 1/2" hex head bolts. That's the sizes on my '51, which should have the same Bendix brakes as a 66 C10. Crescent wrenches are known for drawing blood.
Actually that big nut is for the brake shoe anchor pin used for major adjustment (centering) of the shoes. It's a 15/16" hex. Wheel cylinders are secured by two 1/2" hex head bolts. That's the sizes on my '51, which should have the same Bendix brakes as a 66 C10. Crescent wrenches are known for drawing blood.
Well… that’s not correct. The rear wheel cylinders are attached by two bolts through the backing plate. But the front ones must be mounted by the anchor pin. And the hex measures 1.137”. So I guess a 1-3/16 socket will fit it. I will have to buy one. Thanks for all suggestions. 😊
Frank, you are correct about the wheel cylinder mounting. I didn't look close enough when I checked on RockAuto for the wheel cylinders. Does the rear anchor pin that's separate from the wheel cylinder mounting use a 15/16" hex nut?
It seems like that front anchor pin mount would actually restrict the ability for it to move in relation to the backing plate. The hole in the '51 backing plate is elongated vertically to allow the anchor pin to move.
BTW, RockAuto has AC Delco wheel cylinders for about $12 each.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
I got it apart. And it’s not a nut, it’s the anchor pin. 6-pt impact socket, breaker bar and a generous cheater pipe got it out. It really helps to have the right tools. Thanks for all responses.
