12-17-2010, 01:38 AM | #1 |
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Dually Brakes
I've been looking up parts info for the brake system on the dually because the master cylinder is DEAD. Looking @ the front rotors, they're pretty scarred & I doubt turn-able. I'm not one to replace just one worn part when everything appears of similar age & condition so I was getting ideas on costs for the rotors, calipers, & flex lines too.
As I was searching, I keep seeing a 'severe-duty' option. I'm guessing this was fleet type trucks (wreckers, ambulances, & similar). My assumption is these parts are just a HD version that will interchange w/the standard trucks (89 model FWIW). Can anyone confirm this or share further insight?
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 12-17-2010 at 01:39 AM. |
12-17-2010, 12:16 PM | #2 |
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Re: Dually Brakes
I'm watching this Scot. Be sure and update us with anything you figure out. I've been wondering the same thing for my project truck.
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12-17-2010, 12:28 PM | #3 |
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Re: Dually Brakes
Will do. Diggin' the hay buggies BTW. They seem to be getting better after lessons learned.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
12-17-2010, 12:43 PM | #4 |
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Re: Dually Brakes
I appreciate the words about the buggies. The added financial boost sure helped Christmas this year.
I've been working on an older dually I have lately and taking a break from building trailers. My 94 dually has a hurt big block in it (blown headgasket and cam going flat). I limp it around but there's no way it will pass emissions next year so I'm trying to rebuild this older truck and get away from all that. That's the one I've been researching brakes for.
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I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 12-17-2010 at 12:44 PM. |
12-17-2010, 12:55 PM | #5 | |
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Re: Dually Brakes
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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12-17-2010, 01:50 PM | #6 |
Jonny
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Re: Dually Brakes
Here's some pics of discs off of a P30 Should be The HD stuff.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR Last edited by sailed2japan; 12-17-2010 at 02:00 PM. |
12-17-2010, 02:06 PM | #7 |
Jonny
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Re: Dually Brakes
The spindles I know will bolt on to the upper and lower ball joints. I used a couple of the control arms off this suspension to re-build my C20's front end after I wrecked.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-17-2010, 02:08 PM | #8 | |
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Re: Dually Brakes
Quote:
The brakes in the pictures are way more beefy than either my 78 cab/chassis truck or my 84 crew cab donor truck. Way more beefy...
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12-17-2010, 04:41 PM | #9 |
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Re: Dually Brakes
Scot, send me the VIN and I will see what I can find out on monday. Home today, less 4 teeth.
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12-17-2010, 08:44 PM | #10 |
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Re: Dually Brakes
I have a pair of dually spindles in my shop I can measure if we can find someone with the heavy duty spindles to measure theirs and we can compare.
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12-17-2010, 09:03 PM | #11 |
Jonny
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Re: Dually Brakes
Yeah, if you post some pics and measurements, I'll compare them to what I have.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-17-2010, 09:26 PM | #12 | |
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Re: Dually Brakes
Tx,
The calipers pictured look like mine. When you said . . .... Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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12-17-2010, 09:45 PM | #13 |
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Re: Dually Brakes
Lemme go out to the shop with my camera to see what I can find. I'll be back in a few minutes.
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12-17-2010, 09:56 PM | #14 |
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Re: Dually Brakes
These pictures are the brakes off a donor truck I bought awhile back. I think it's either an 84 or 85 Crew cab truck. The parts appear the same as the pictures posted above. However, the reason I bought these parts is that they are beefier than the ones on my 78 dually. It's outside the shop in the dark though, so no pictures of those parts tonight.
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12-17-2010, 10:42 PM | #15 |
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Re: Dually Brakes
Well, I got the master cyl installed & bled the brakes. It stops now but not much better than before.... @ least the pedal doesn't collapse now.
The front pads don't look paper thin but don't appear new either. It does look like the pads were swapped w/nothing done to the rotors. My guess is the rears are in worse shape because of the apparent difficulty of a rear brake job. I say 'apparent' because personally I've never done rear brakes on a dually but have been digging for tech info. IMO, the rears aren't doing much if anything right now which is why it's taking so much brake effort to stop this lil' red tank. I just went back outside for final clean-up, crawled under the front again & confirmed the front calipers look just like these....
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 12-17-2010 at 10:44 PM. |
12-17-2010, 11:45 PM | #16 |
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Re: Dually Brakes
Since you sound like your going to go through the entire system, I would look at what Praise Dyno Brakes has to offer- LINK A good friend of mine went through lots of pads on rotors on his F350 until he bought a set from Praise. The cryogenic treated brakes are a HUGE improvement over stock.
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12-18-2010, 02:49 AM | #17 |
Jonny
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Re: Dually Brakes
rear breaks on the dually aren't too difficult. The big thing is you need to pull the axle shaft. once that is done pull off the nut for the hub/drum assembly and pull the drum. All in a days work...or 2 ays if you do both sides.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-18-2010, 10:25 AM | #18 |
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Re: Dually Brakes
Exactly why many would opt to just roll w/it as is. That's some effort vs. just replacing front disc pads (remember, the rotors weren't replaced or turned from the looks of them).
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
12-18-2010, 11:37 AM | #19 |
Jonny
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Re: Dually Brakes
Personally I don't think it's Hard at all. It only takes an extra 15 or 20 minutes over any other drum break job. Now I rarely touch my rear breaks because it doesn't seem like they wear out...EVER! They must be magic
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-19-2010, 10:13 PM | #20 |
Jonny
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Re: Dually Brakes
Scoti, what dod your brakes look like? Are they the same as these? I'd like to see the other version for future reference.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-19-2010, 10:48 PM | #21 |
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Re: Dually Brakes
I put the severe duty on my c10 suburban with the heavy duty chassis. Here is the difference:
The outside diameter of the severe duty application will remain the same (in my case - 1.25") The difference between the heavy and severe duty lies in the thickness of the gap with the ribs. The two sides are thicker in a severe duty application (so the gap is thinner between the two sides). Another difference is in the chemistry of the metal. I believe that the severe duty uses more iron in the mix - thus making the parts heavier at less resistant to warping from braking and less prone to wearing down as quickly. Hope this helps |
12-19-2010, 11:01 PM | #22 |
Jonny
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Re: Dually Brakes
Well brakes on a dually and a C10 are two totally different animals. That's good info for the 1/2 tonners, though.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-19-2010, 11:28 PM | #23 |
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Re: Dually Brakes
I saw a write up concerning upgrades to k30 hydro-boost using the P-series parts. The author claimed far superior braking performance, unfortunately I cannot find the article now. It was on another forum (coloradok5) and I never subscribed to the thread. Might be a good place to look though.
JLT |
12-19-2010, 11:34 PM | #24 |
Jonny
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Re: Dually Brakes
Hydroboost is a far superior system to vaccum boosted brakes. I'll never go back to them in a truck especially.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
12-19-2010, 11:53 PM | #25 | |
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Re: Dually Brakes
Quote:
I was very surprised during that 1st test drive @ how ineffective the brakes were (it takes some serious pedal effort to stop this thing). I think Jonboy was equally surprised @ how much better the brakes were in the 74 vs. this dually (judging from the look on his face the 1st time he touched the 74's brake pedal as we braced ourselves on the dash ). That comparison told me there was need for a thorough inspection & expected maintenance. My buddy Matt had a good point when we discussed concerns on Saturday. He feels we should just adjust the rears so they're @ the correct drag/tension & swap on some new front rotors/pads. We'll go from there. I'll get some pics before the rotors are swapped.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 12-19-2010 at 11:55 PM. |
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