53wlee53 Posted March 14, 2015 Report Share Posted March 14, 2015 I posted this on the MDT side with no response so I'll try it here. I have a 09 Freightliner M2-106 air brakes, cab, seats, rear suspension. Last weekend I took a trip to central Alabama to pu a 66 Chevy truck with the Freightshaker and my gooseneck trailer. 750 round trip. The weekend before I made the same trip with a 6.5x16 tag trailer only to find it wouldn't fit,bummer! On the first trip i had trouble with the air system. It would take a long time to charge up and unload. Then after awhile when it would unload it would keep leaking air until it reached 50 psi. The compressor would kick in and slow down the pressure fall be a cruse rpm it couldn't keep up. It would do this 2-3 times then stop. Might go 50 to 100 miles same thing again. I got home and changed the governor and the undoader, took the last trip and it acted the same but not as often. What am i missing? It charges up like it used to so I think governor was needing replacement. Cralled under the truck and when it's leaking it's out the bottom of the unloader.. I have the Bendix AD-IS dryer. Thanks, Wayne Lee Link to comment Share on other sites More sharing options...
Darryl&Rita Posted March 14, 2015 Report Share Posted March 14, 2015 Air dryer time. Link to comment Share on other sites More sharing options...
billr Posted March 14, 2015 Report Share Posted March 14, 2015 Yup....What Darryl said, same thing on my Volvo a few years ago. Link to comment Share on other sites More sharing options...
53wlee53 Posted March 15, 2015 Author Report Share Posted March 15, 2015 Thanks for the info. Kinda only thing left. Before I replace I'm gona see if theres a rebuild kit. That thing ain't cheep! Wayne Link to comment Share on other sites More sharing options...
Jack Mayer Posted March 15, 2015 Report Share Posted March 15, 2015 There are rebuild kits for air dryers. But what you are likely to find is that it is beyond rebuilding. The two I pulled apart were not really suitable for a rebuild. But if you have time it is worth a try. Link to comment Share on other sites More sharing options...
53wlee53 Posted March 18, 2015 Author Report Share Posted March 18, 2015 I'll give it a try. It's got to come off anyway. Nothing ventured nothing gained! Link to comment Share on other sites More sharing options...
Star Dreamer Posted November 16, 2015 Report Share Posted November 16, 2015 We got a rebuilt one from Freightliner for our Century. I think it was only a couple hundred dollars. Our pop off valve was sticking open and would not build pressure. We could push it closed and it would work fine for awhile but did not want it to act up on a trip. Dave Link to comment Share on other sites More sharing options...
beyerjf Posted November 16, 2015 Report Share Posted November 16, 2015 A reman air Dryer was $350 with a core charge of $250 for the truck in the avatar about 3 months ago. I had to destroy it to get it off(15 years old) and replace the air tank it bolted to. Ate the whole cost. Link to comment Share on other sites More sharing options...
bmzero Posted November 16, 2015 Report Share Posted November 16, 2015 I'm having issues with my dryer as well, wanting to purge way too often. The local Volvo dealer recommended a replacement at $450. Anyone have experience with aftermarket dryers, like the one below? http://www.ebay.com/itm/Volvo-Truck-Air-Dryer-Cartridge-Assembly-85122946-2003-2014-/121525258011 Link to comment Share on other sites More sharing options...
Dollytrolley Posted November 16, 2015 Report Share Posted November 16, 2015 I'll give it a try. It's got to come off anyway. Nothing ventured nothing gained! Right on...... Last winter down in Yuma I was getting bored so.......why not attack the air dryer....it was operating "fair" but was somewhat erratic in purging sometimes..... I yanked it apart and it looked like it had a million miles of bad road inside........as expected.... I wondered down to the local "shaker-parts-shack" and priced the rebuild kit and a new mount and then the geezer-parts-geek said, "just a bit of advice from one old geezer to another geezer, we have a sale on dryers right now and for nearly the same price as the kit and the neww mount I can sell you a referb-dryer and mount......... The referb-dryer and mount was bolted up and it has worked purrrrfect so far so good...... Shop around prices are up and down..... Drive on........(Dry air is.....good air) Link to comment Share on other sites More sharing options...
MrSeas Posted November 16, 2015 Report Share Posted November 16, 2015 So here is the "question of the day"......." what is the correct purge cycle". How many seconds between "purges" is considered normal? Link to comment Share on other sites More sharing options...
Hewhoknowslittle Posted November 16, 2015 Report Share Posted November 16, 2015 I'm having issues with my dryer as well, wanting to purge way too often. The local Volvo dealer recommended a replacement at $450. Anyone have experience with aftermarket dryers, like the one below? http://www.ebay.com/itm/Volvo-Truck-Air-Dryer-Cartridge-Assembly-85122946-2003-2014-/121525258011 Looks just like the one I put on mine, works great but bought mine at a local dealer wholesale for about the same price, I don't think you can go wrong!! Roger Link to comment Share on other sites More sharing options...
bmzero Posted November 16, 2015 Report Share Posted November 16, 2015 Looks just like the one I put on mine, works great but bought mine at a local dealer wholesale for about the same price, I don't think you can go wrong!! Roger Thanks, Roger. Link to comment Share on other sites More sharing options...
Darryl&Rita Posted November 16, 2015 Report Share Posted November 16, 2015 So here is the "question of the day"......." what is the correct purge cycle". How many seconds between "purges" is considered normal? Totally unit dependent. They purge each cycle, so if you use a lot of air (leaks), it'll cycle more frequently. Link to comment Share on other sites More sharing options...
MrSeas Posted November 17, 2015 Report Share Posted November 17, 2015 Totally unit dependent. They purge each cycle, so if you use a lot of air (leaks), it'll cycle more frequently. Kinda what I thought from talking to various folks but I also hear about folks complaining about the "quick" cycles. Link to comment Share on other sites More sharing options...
Bigtrailer Posted November 17, 2015 Report Share Posted November 17, 2015 You guys with air leaks, check your clutch fan. Build up air, shut off engine, and spray windex or soapy water on the fan hub right below the blades. If you see air bubbles, it may be time to exchange it. $850 at Freightliner, core charge is the same. Bill Link to comment Share on other sites More sharing options...
Broncohauler Posted November 17, 2015 Report Share Posted November 17, 2015 Fast air cycles also sometimes mean a problem with the governor being bad. Watch your air tank gauges if the dryer is popping off and air compressor is cycling on immediately before it drops down around 100 psi could very well be your governor's bad. We had computer problems on our freightliners that were telling the air dryer to constantly pop off don't know why or how it work. Link to comment Share on other sites More sharing options...
Scrap Posted November 17, 2015 Report Share Posted November 17, 2015 30/30 are the numbers to remember for the average OTR dryer or you are hurting it. Must have a min of 30 seconds unloaded to regenerate and must stay under 30% duty cycle. Link to comment Share on other sites More sharing options...
SunJuniper Posted November 19, 2015 Report Share Posted November 19, 2015 anyone replacing Bendix air dryers with a new one or reman.... there are CLONES that look almost identical and have the almost identical marking on the air dryer that say bendix. BE VERY WARY of cheap prices for a replacement unit. the clones are JUNK!. Link to comment Share on other sites More sharing options...
Scrap Posted November 21, 2015 Report Share Posted November 21, 2015 Ran across a guy this week that put one of these in each of his air tanks. I'm not sure if it is one of those things where more gauges = more breakdowns but it seemed like a pretty slick idea to me! http://www.summitracing.com/parts/dvr-190895/overview/ Link to comment Share on other sites More sharing options...
Ronbo Posted November 21, 2015 Report Share Posted November 21, 2015 I thought they had a replaceable cartridge Link to comment Share on other sites More sharing options...
HERO Maker Posted November 22, 2015 Report Share Posted November 22, 2015 Ran across a guy this week that put one of these in each of his air tanks. I'm not sure if it is one of those things where more gauges = more breakdowns but it seemed like a pretty slick idea to me! http://www.summitracing.com/parts/dvr-190895/overview/ Scrap, not sure which one of these would be the correct one? Do you know? http://www.summitracing.com/search/brand/devilbiss/product-line/devilbiss-air-compressor-desiccant-dryer-replacement-humidity-indicators Link to comment Share on other sites More sharing options...
Bigtrailer Posted November 23, 2015 Report Share Posted November 23, 2015 Ran across a guy this week that put one of these in each of his air tanks. I'm not sure if it is one of those things where more gauges = more breakdowns but it seemed like a pretty slick idea to me! http://www.summitracing.com/parts/dvr-190895/overview/ These are for guys that paint cars, right? They can't have any moisture or it will show up with little water droplets, I have never seen this on a commercial rig. Bill Link to comment Share on other sites More sharing options...
rdickinson Posted November 23, 2015 Report Share Posted November 23, 2015 I thought they had a replaceable cartridge It is on my 730, a big spin on like an oil filter. $160 Can. Good idea to keep that clean. You don't want all that oil & water going into the air system. I'm told to change it every year but that may depend on hrs of service. Others will know more. Link to comment Share on other sites More sharing options...
HERO Maker Posted November 23, 2015 Report Share Posted November 23, 2015 If I'm reading what Scrap is talking about - this is just the indicator, not the dryer itself. And yes, painters don't want any moisture, and neither do we! Link to comment Share on other sites More sharing options...
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