Neo Posted February 13, 2022 Share Posted February 13, 2022 Hello everyone... Question.... Are air dryers purge valve combination universal to trucks... I have a Mack midliner and I'd like to change the purge valve but it is very difficult to locate so I'm wondering if others can be used Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/ Share on other sites More sharing options...
Onyx610 Posted February 14, 2022 Share Posted February 14, 2022 No there not, you need the one that’s designed for your air dryer. Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489395 Share on other sites More sharing options...
Joey Mack Posted February 14, 2022 Share Posted February 14, 2022 I wish I could remember how the air dryer is mounted on the Midliner.. If it's remote and not mounted to the tank, couldnt he just buy an AD-6 smaller air dryer and install it, then re-build the hoses, input/output, and route new ones? Just curious, and if this can be done then you will have a modern, easy to get parts for, air dryer... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489419 Share on other sites More sharing options...
Neo Posted February 17, 2022 Author Share Posted February 17, 2022 On 2/14/2022 at 4:40 PM, Joey Mack said: I wish I could remember how the air dryer is mounted on the Midliner.. If it's remote and not mounted to the tank, couldnt he just buy an AD-6 smaller air dryer and install it, then re-build the hoses, input/output, and route new ones? Just curious, and if this can be done then you will have a modern, easy to get parts for, air dryer... jojo I wish it was so Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489590 Share on other sites More sharing options...
Neo Posted February 17, 2022 Author Share Posted February 17, 2022 On 2/14/2022 at 10:10 AM, Onyx610 said: No there not, you need the one that’s designed for your air dryer. So can other air dryers be used.... Thing is I can get any parts for it Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489591 Share on other sites More sharing options...
Joey Mack Posted February 17, 2022 Share Posted February 17, 2022 Neo, It seems to me you have 3 threads on this issue.. in this last post you said you CAN get parts for a Midliner.. if you CAN get parts for youre Midliner, then you are sitting on a gold mine... I have a Book coming my way, if there is info in it that you need, I will try to share it.. I still think you can remove the old air management system and mount a small air dryer that will have the purge valve in it. as far as the unloader valves, those should be in the air compressor head.. jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489600 Share on other sites More sharing options...
Neo Posted February 21, 2022 Author Share Posted February 21, 2022 On 2/17/2022 at 7:26 AM, Joey Mack said: Neo, It seems to me you have 3 threads on this issue.. in this last post you said you CAN get parts for a Midliner.. if you CAN get parts for youre Midliner, then you are sitting on a gold mine... I have a Book coming my way, if there is info in it that you need, I will try to share it.. I still think you can remove the old air management system and mount a small air dryer that will have the purge valve in it. as far as the unloader valves, those should be in the air compressor head.. jojo Yes ... Apologies for the confusion in threads ... I tend to seek information from all over ... I have pulled the compressor apart..... It's very basic.....just an inlet valve and discharge valve...that's it Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-489919 Share on other sites More sharing options...
Joey Mack Posted February 23, 2022 Share Posted February 23, 2022 I just learned that the unloader is remote and not in the compressor head... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490105 Share on other sites More sharing options...
Onyx610 Posted February 23, 2022 Share Posted February 23, 2022 Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490109 Share on other sites More sharing options...
Onyx610 Posted February 23, 2022 Share Posted February 23, 2022 Unloader/governor. Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490110 Share on other sites More sharing options...
Onyx610 Posted February 23, 2022 Share Posted February 23, 2022 Took this pic from another thread, look at the one air tank. Forget the arrow. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490111 Share on other sites More sharing options...
Neo Posted February 28, 2022 Author Share Posted February 28, 2022 On 2/23/2022 at 3:24 PM, Onyx610 said: Not seeing anything like this on my truck.... The CS300 are fill air brakes... Mine is air over hydraulic Quote Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490542 Share on other sites More sharing options...
Hayseed Posted February 28, 2022 Share Posted February 28, 2022 Neo, I'd suggest that you purchase a Manual for your Truck.. https://www.autopaper.com/1981-mack-truck-mid-liner-ms200-series-owners-manual-original-care-operation.php https://diyrepairmanuals.com/product/1982-mack-truck-mid-liner-service-manual/ https://www.auto-repair-manuals.com/Mack-Truck-Mid-Liner-Brake-and-Air-System-Service-Manual.html https://www.ebay.com.au/itm/324102646823?chn=ps&_ul=AU&_trkparms=ispr%3D1&amdata=enc%3A1SpXbA9WERBO6L8YbaYYLYg38&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=324102646823&targetid=1597821229625&device=c&mktype=pla&googleloc=9071992&poi=&campaignid=14474119807&mkgroupid=127424473355&rlsatarget=pla-1597821229625&abcId=9300653&merchantid=9481802&gclid=EAIaIQobChMI_Livo-Kh9gIVnppmAh3UoQCNEAQYASABEgKekPD_BwE It will make things so much easier for You...!! Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/69211-air-brake/#findComment-490550 Share on other sites More sharing options...
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