Truelove Posted August 10 Share Posted August 10 My truck crane has 30/30 and 40/40 pods mixed on both drive axles, and are on alternate sides. You guys ever seen an application like this, or are they just replacements? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/ Share on other sites More sharing options...
cruiseliner64 Posted October 29 Share Posted October 29 Replacements id say.if you have 30/30 on one side and 40/40 on the other side of the same axle you will have a brake imbalance.it would never pass a safety inspection here in Ireland.... Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561032 Share on other sites More sharing options...
Geoff Weeks Posted October 29 Share Posted October 29 (edited) I have never heard of or seen a #40 brake chamber. #36 is the largest in common use, and even they are not common. Got a "hit" for type 50 rotochamber, but nothing for a 40. Edited October 29 by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561033 Share on other sites More sharing options...
Joey Mack Posted October 29 Share Posted October 29 axles need to have matiching brake components across them.. These guy's told you right.. Jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561039 Share on other sites More sharing options...
fjh Posted October 29 Share Posted October 29 36 is common on mixer’s here du to the weight it’s ok to have one axle bigger but not one for on each! That said your safer with all the same on all drivers are best! Steer axle brakes Must have matched pods even if you have roto chamber they must be both roto by our rules here! Common to have 24 on the front sometimes 20!As a side note long stroke pots are not inter mix able here either even though they are 30/30 0r 24/24 dumb but true!my belief is that every thing should have long stroke pots period! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561040 Share on other sites More sharing options...
MACKS Posted October 29 Share Posted October 29 13 minutes ago, fjh said: 36 is common on mixer’s here du to the weight it’s ok to have one axle bigger but not one for on each! That said your safer with all the same on all drivers are best! Steer axle brakes Must have matched pods even if you have roto chamber they must be both roto by our rules here! Common to have 24 on the front sometimes 20!As a side note long stroke pots are not inter mix able here either even though they are 30/30 0r 24/24 dumb but true!my belief is that every thing should have long stroke pots period! Never knew they even made different stroke lengths for the 30/30 chambers.. Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561042 Share on other sites More sharing options...
Mark T Posted October 29 Share Posted October 29 1 minute ago, MACKS said: Never knew they even made different stroke lengths for the 30/30 chambers.. Most long strokes have a square form around the ports for the air ( service and spring ) Geometry is all different for regular and long stroke. They make'm though. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561043 Share on other sites More sharing options...
Joey Mack Posted October 29 Share Posted October 29 Macks, there are 2 1/2'' and 3'' maxi's.. the 3'' one's can be identified buy square cut ports for the air lines,,, just in case you can read the lable or whatever... Jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561044 Share on other sites More sharing options...
MACKS Posted October 30 Share Posted October 30 16 minutes ago, Joey Mack said: Macks, there are 2 1/2'' and 3'' maxi's.. the 3'' one's can be identified buy square cut ports for the air lines,,, just in case you can read the lable or whatever... Jojo I know 24 cans are long or short but the 30 are just one length right.. Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561045 Share on other sites More sharing options...
Popular Post Joey Mack Posted October 30 Popular Post Share Posted October 30 the rod length is not the issue here, ther are many laengths of rods,, the stroke of the plunger in the diaphragm is where the difference is. the actual movement of the rod.. you can also see that the center section of the brake chamber is wider too.. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561046 Share on other sites More sharing options...
Joey Mack Posted October 30 Share Posted October 30 I meant to say longer.. the whole unit is longer.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561047 Share on other sites More sharing options...
Popular Post Mark T Posted October 30 Popular Post Share Posted October 30 30 minutes ago, MACKS said: I know 24 cans are long or short but the 30 are just one length right.. No 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561049 Share on other sites More sharing options...
Popular Post Mark T Posted October 30 Popular Post Share Posted October 30 Air chambers can be confusing since there's so many different ones that have become popular. 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561050 Share on other sites More sharing options...
MACKS Posted October 30 Share Posted October 30 11 hours ago, Mark T said: No Ok my bad,never heard anybody ask for a short stroke 30 at the parts store,our local Mack dealer has a huge cardboard box on the floor 6x6 filled with brake chambers all long stroke,I’ve just been grabbing them from there as long as. I can rember.. Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561053 Share on other sites More sharing options...
mechohaulic Posted October 30 Share Posted October 30 13 hours ago, Joey Mack said: the rod length is not the issue here, ther are many laengths of rods,, the stroke of the plunger in the diaphragm is where the difference is. the actual movement of the rod.. you can also see that the center section of the brake chamber is wider too.. the diaphragm is the most important component to the long/short stroke chamber, 2 1/2 vs 3 diaphragm side by side show considerable difference in height. not good to put a 2 1/2 in a long stroke chamber. have seen the pressure blow apart the diaphragm from pushing it further then manufactured for. Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561054 Share on other sites More sharing options...
fjh Posted October 30 Share Posted October 30 13 hours ago, MACKS said: I know 24 cans are long or short but the 30 are just one length right.. The best identifier is the square port as mentioned and No as mentioned! 30/30 is the most common these days on drum brakes ! Im not sure what they are using on the Disc stuff as Im well removed from the business these days thankfully ! They look like 20/20 or 24/24 ! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561055 Share on other sites More sharing options...
Popular Post Mark T Posted October 30 Popular Post Share Posted October 30 9 hours ago, fjh said: The best identifier is the square port as mentioned and No as mentioned! 30/30 is the most common these days on drum brakes ! Im not sure what they are using on the Disc stuff as Im well removed from the business these days thankfully ! They look like 20/20 or 24/24 ! Discs are a whole other size. I'm learning about this lately. Just changed some on my T880, they're like 24/18s or something. Really need to pay attention anymore. Mix'n anything is a fast way to no brakes. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74448-brake-pod-mixing/#findComment-561091 Share on other sites More sharing options...
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