Even though my brakes do work well, there is a noticeable leak from (at least one) wheel cylinder. Since I'm not using the truck while it is icy out, this makes for a good time to find the parts, so I can work them once the warm spring is here. As expected, I didn't find many parts to match a 3-ton. Best I could find is at Dorman, but not 100% sure they are for a 3-ton, despite being for a 450 (US 3-ton GMC, 9700 in Canada): Dorman
Though I have wheel cylinders from a similar truck, I don't trust them to be the same. When looking at other trucks for parts, it's axle didn't match anything else. Even then, they are likely seized and bad rubber.
Is there any similar ton model that would have the same size wheel cylinders?
i suggest you remove the one from your truck and measure it and if it is indeed 1.5 inch, and looks like the photos on Amazon, then go for it also, could try walking into Napa with the old one as see what they can do, but i doubt they will be cheaper than an online search
take note of that "note 1" detail from the parts manual if you have material mismatched from old to new, you can clean up and reuse your original pistons in the new cylinder from wherever example: if your truck has steel pistons, but the replacement uses aluminum pistons, i would de-rust and reuse your steel pistons in the new cylinder -s
Unless your brake cylinder castings (master and wheel) are in excellent condition, I'd strongly suggest having then sleeved with stainless steel. It's a one time expense that will assure they can be rebuilt repeatedly. and a good polished surface on the sleeve will make those new cups last much longer between rebuilds. It's a pretty simple procedure that any machinist worthy of the name should be able to do. 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!
I may as well ask here while we are talking about wheel cyilinders - would that part number be the same for a GM 9600 2.5 ton truck?
The pedal on my truck goes right to the floor, and has no fluid in the MC, so I am presuming I will need to do a bumper-to-bumper overhaul of my brakes, including replacing the brake lines and wheel cyilinders.
I may as well ask here while we are talking about wheel cylinders - would that part number be the same for a GM 9600 2.5 ton truck?
The pedal on my truck goes right to the floor, and has no fluid in the MC, so I am presuming I will need to do a bumper-to-bumper overhaul of my brakes, including replacing the brake lines and wheel cylinders.
Since you're doing a complete overhaul, just send your existing MC and WC's out to be sleeved like Jerry mentioned. White Post Restoration (lifetime warranty) is just one of the places that sleeves and rebuilds them.
U.S. built 47-54 GMC 450, and 470 series 3 ton ,and 3 1/2 ton trucks have a different brake system, than the 300, and 350 series 1 1/2, and 2 ton trucks. Wheel cylinders are not even close to being the same. NAPA 15315, Raybestos WC15315.
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers
Spanky- - - -any words of wisdom on master cylinders? I'll be doing a total rehab on a 51 GMC 3 ton with a 2-speed rear axle, not sure about the front, since I don't have possession of the truck yet. The master cylinder has been misplaced. I'll be sleeving all the wheel cylinders myself since I have the machine tools and experience to do the job.
"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!
Quick question. I finally took the wheels and cylinders off. Turns out, the cups are "rings" that go into the piston. Does the piston screw apart or does the cup stretch over it?
Hy Alex Arrow, on the ring style cups, the seals stretch into position. On the larger bore cylinders both types of pistons are usually available, and I have never heard an explanation of why one type of piston is used over the other.
you should be able to find a master cylinder for your truck or one from a newer one that would work what kind of brake system do you have is it a firewall mounted booster or is there a booster under the cab.
1967 Chevy c50 327 w/ sm465 5000Ib front 15k 2 speed rear w/ 22k springs, single axle, hydraulic brakes
I just ordered Raybestos WC14500 wheel cylinders from Rockauto for $78 each. Better than $109-149 quoted in other places. These are for the rear of my 6400. I’m replacing all 4 in the rear, already did the front.
