DN DeCelle Posted February 27, 2020 Share Posted February 27, 2020 I have a 1989 Mid-liner MS200. The coupling in front of the Knorr-Dahl air compressor has become very noisy until the unloader valve opens. This is my first truck with air brakes and I’m not familiar with what this coupling is called. I’d like to replace it and am hoping someone can tell me what it’s called, and maybe a part number. I got the truck last year. All of the brake valves were leaking. I’ve replaced the unloader valve and the foot valve. I’m having trouble finding the parking brake valve and want to replace the noisy compressor drive shaft coupling. Other than the worn out brake valves, the truck is completely solid. Former Penske truck. 125,000 well maintained miles. Not a single leak or wet spot on the 5.5L engine. I believe the truck was parked when the unloader valve gave up and they started looking for parts. I have no intention of ever stepping foot in a Mack dealership. So far, I’ve crossed numbers and found parts on the internet for very reasonable prices. Thanks for any help. I look forward to learning a lot here. Of course, the pictures turned sideways. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/ Share on other sites More sharing options...
DN DeCelle Posted February 27, 2020 Author Share Posted February 27, 2020 I didn’t call a Mack dealer and won’t be. I am hoping this forum can help me. I’ve never had a good experience at any dealership. Hoping someone might have the parts manual. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443902 Share on other sites More sharing options...
terry Posted February 28, 2020 Share Posted February 28, 2020 3 hours ago, DN DeCelle said: I didn’t call a Mack dealer and won’t be. I am hoping this forum can help me. I’ve never had a good experience at any dealership. Hoping someone might have the parts manual. Have checked e-bay for a manual? terry Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443918 Share on other sites More sharing options...
DN DeCelle Posted February 28, 2020 Author Share Posted February 28, 2020 Yes. There is a parts catalog on eBay for a cool $399.99. If I knew what the part were called, I’d be in business. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443924 Share on other sites More sharing options...
DN DeCelle Posted February 28, 2020 Author Share Posted February 28, 2020 Ok. Thanks. The dealer quoted me just shy of $700 for the foot valve. Got one online for $75. Quoted me just shy of $300 for unloader valve. Got it for $36 online. Both new and functioning perfectly. The foot valve is even Wabco. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443927 Share on other sites More sharing options...
DN DeCelle Posted February 28, 2020 Author Share Posted February 28, 2020 Just did some searching and numbers crossing and found the hand brake valve for $49.64 with free shipping. One way or another, I’ll find that coupling and I won’t be involving the Mack stealership. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443931 Share on other sites More sharing options...
PANELIZER Posted February 28, 2020 Share Posted February 28, 2020 Hope this helps01261403.PDF 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443953 Share on other sites More sharing options...
PANELIZER Posted February 28, 2020 Share Posted February 28, 2020 01261403.PDF Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443954 Share on other sites More sharing options...
DN DeCelle Posted February 28, 2020 Author Share Posted February 28, 2020 It helps so very much. Thanks don’t begin to say it, but thank you so much. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-443957 Share on other sites More sharing options...
KKERGALL Posted February 29, 2020 Share Posted February 29, 2020 I have a guy that has parts catalogs for the Midliner's will have to go there and borrow it for part numbers. Rich Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444068 Share on other sites More sharing options...
DN DeCelle Posted March 1, 2020 Author Share Posted March 1, 2020 Awesome. The seller on eBay that has the catalog for sale offered it to me for $299.99 today. Is it me, or is that a bit excessive for a parts catalog? So far, the numbers that Panelizer provided haven’t produced much. I know these parts aren’t exactly on the shelves at Autozone, but I was hoping to shake something loose. Patience. I’ve got time. I’ve emailed a couple places in Europe. I’m a “glass half full” kind of guy, so I’ll fill my glass eventually. Thanks again for the help. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444104 Share on other sites More sharing options...
DN DeCelle Posted March 2, 2020 Author Share Posted March 2, 2020 Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444234 Share on other sites More sharing options...
DN DeCelle Posted March 2, 2020 Author Share Posted March 2, 2020 Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444235 Share on other sites More sharing options...
DN DeCelle Posted March 2, 2020 Author Share Posted March 2, 2020 So far, I’ve got a bite in Slovakia. Waiting to hear from France. Looks like it’s less than $50. Just in case anyone is interested. Thanks again for the part number Panelizer. Just took patience. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444277 Share on other sites More sharing options...
41chevy Posted March 3, 2020 Share Posted March 3, 2020 When you get one, I'd get a few 3d printed to keep or sell. Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444283 Share on other sites More sharing options...
DN DeCelle Posted March 3, 2020 Author Share Posted March 3, 2020 I’ll probably buy a few, if they are reasonable. That is a good idea. I haven’t took French since the 3rd grade. I’m just a bit rusty. Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444301 Share on other sites More sharing options...
DN DeCelle Posted March 8, 2020 Author Share Posted March 8, 2020 For anyone interested, I found one in England and it’s on the way. Thanks again to panelizer for providing the part number. Just a few more relatively minor parts, and it’ll be ready for work again. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-444756 Share on other sites More sharing options...
91Midliner Posted September 22, 2021 Share Posted September 22, 2021 (edited) 1991 Midliner CS300 - Drivers side above the RIGHT side of battery box , 5 air lines and 3 electrical sensors screw into this 1.5" by 4.75" rectangular metal or white metal manifold block. Need to replace this manifold block as mine is cracked. SEE PHOTOS of part highlighted in RED. Any ideas ?? Edited September 22, 2021 by 91Midliner pictures text Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-480304 Share on other sites More sharing options...
Neo Posted February 17, 2022 Share Posted February 17, 2022 On 2/27/2020 at 10:23 PM, DN DeCelle said: Ok. Thanks. The dealer quoted me just shy of $700 for the foot valve. Got one online for $75. Quoted me just shy of $300 for unloader valve. Got it for $36 online. Both new and functioning perfectly. The foot valve is even Wabco. Hell ., Can you send a pic of the unloader valve and purge valve please Quote Link to comment https://www.bigmacktrucks.com/topic/61178-1989-mid-liner-ms200-compressor/#findComment-489593 Share on other sites More sharing options...
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