| Author | Message | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 68 Registered: 2-2009 Posted From: 71.139.244.152  Rating: N/A |
Does anyone out there use 2430 springbrakes? That is type 24 on the service side and type 30 on the springbrake side? I've got about 12 new ones and before I offer them for sale I'd like to know how popular they are. Thanks | ||
| larry currier (Larryc)
Registered Member Username: Larryc Post Number: 231 Registered: 2-2007 Posted From: 205.188.116.203 Rating: N/A |
Dave, Last time I saw one was on a 72 Ford. Pretty rare. My 89 Eagle has 36-30's and has the longer stroke for safety I imagine. The 24 stroke is getting pretty short, unless you really watch the adjustment, you could run out of brakes pretty fast. Wonder if they are enough smaller to replace a DD3? Sometimes there is a lack of space that prevents change over. | ||
| Kyle Brandt (Kyle4501)
Registered Member Username: Kyle4501 Post Number: 481 Registered: 9-2004 Posted From: 65.23.106.193  Rating: N/A |
If I remember right - 24 is for sq inches of area for air pressure to apply the brakes. 30 is for sq inches of area for the spring retraction diaphram. I had to find some 20-24's for an old international dump truck that had wedge brakes instead of the cam brakes. A little more info: http://www.newlifeparts.com/catalog/section3.pdf (Message edited by kyle4501 on June 18, 2009) | ||
| Tim Brandt (Timb)
Registered Member Username: Timb Post Number: 369 Registered: 10-2003 Posted From: 66.165.176.62  Rating: N/A |
David what is the overall length from mounting flange to back of spring can? | ||
| Ralph Peters (Ralph7)
Registered Member Username: Ralph7 Post Number: 21 Registered: 3-2004 Posted From: 66.59.120.171 Rating: N/A |
Kyle is is correct, the numbers equate to pancake size, NOT stroke length. Long stroke chambers are marked long stroke. | ||
| larry currier (Larryc)
Registered Member Username: Larryc Post Number: 232 Registered: 2-2007 Posted From: 205.188.116.203 Rating: N/A |
I think if you look at the 2 diaphrams, you will see that the stroke is somewhat shorter with the smaller diaphram. They shrunk the overall size, not just the circumference. | ||
| Dallas (Dal300)
Registered Member Username: Dal300 Post Number: 209 Registered: 3-2006 Posted From: 75.88.192.62 Rating: N/A |
According to schoolbuspartsco, the mgm piggyback brakes with short stroke are 2.50" no matter what the diaphragm diameter and the long stroke have a 3" stroke. http://www.schoolbuspartsco.com/WebPages/brake/mgmshort.html http://www.schoolbuspartsco.com/WebPages/brake/mgmlong.html I want to put springbrakes on my 4103, how much do you have to have out of a pair? | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 69 Registered: 2-2009 Posted From: 71.139.244.152 Rating: N/A |
The number (24) or (30) is the measurement in square inches. Multiply that by your air pressure and you have your application pressure, i.e. 30 sq. in. times 100psi = 3,000psi of application pressure on the foundation hardware/brake parts. The 24/30s and the 30/30s are basically the same physical dimension for overall length/height. The service end of the brake chamber (that mounts to the brake spider) is another 2-1/2" for almost all the different ones I measured. So the piggybacks are about 7", and add to that the service chamber end and you have approx 9-1/2", whether it be 24/30 or 30/30. Regarding stroke, standard chambers (not short stroke) and long stroke (LS) are the two. LS are relatively new on the market (last 10 years or so). Thanks, Dave | ||
| larry currier (Larryc)
Registered Member Username: Larryc Post Number: 233 Registered: 2-2007 Posted From: 205.188.116.203 Rating: N/A |
Thanks Dallas, I had carried the smaller ones on the shelf inside the larger ones for so long that I really thought they were shorter stroke although thats been a few years! I also had checked Bendix for some info before I posted that and all I could come up with was that the new replacement 30 chamber comes with a 13 3/8" push rod and the 24 comes with an 11 inch push rod. Go figure! | ||
| Dallas (Dal300)
Registered Member Username: Dal300 Post Number: 210 Registered: 3-2006 Posted From: 75.88.192.62 Rating: N/A |
No Problem Larry.. I had to look it up too. I was sure I had seen a difference in stroke before and was slack jawed and mystified when I found I was wrong...... that makes twice that's happened. |