sclord2002 Posted January 9, 2015 Report Share Posted January 9, 2015 I just saw several new Volvo 780's at my local dealer that had tandem axles but the #3 axle was a dead or tag axle [no pumpkin]. I guess you can spec them any way you want them but these were the first I had seen that were set up this way. It would certainly simplify singling short since the only drive axle is already in the #2 axle position and no driveline changes would be required. Have I just not been paying attention or is this a new trend in tandems ??? Charlie Don't ever tell a soldier that he doesn't understand the cost of war. Link to comment Share on other sites More sharing options...
RayJay Posted January 9, 2015 Report Share Posted January 9, 2015 According to my son, a fleet mechanic, a lot of companies are specing them that way to save $$$. -- Ray & Wendy Full time wanna be - finally! 2014 Entegra Anthem 42RBQ 2018 Jeep Wrangler JLU Link to comment Share on other sites More sharing options...
rickeieio Posted January 9, 2015 Report Share Posted January 9, 2015 When I was a boy, me 'n my pet dinosaur would sit by the road and watch the trucks to see which were "live" tandems, or had a dead axle. Seriously as late as the middle seventies, lots of OTR trucks had a dead axle, and only trucks intended to go off road had both drive. A pretty large fleet owner near here still orders his new trucks that way. Less weight. fuel, tire wear, etc. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
adept99 Posted January 9, 2015 Report Share Posted January 9, 2015 Gotta be a fairly savvy driver or you can manage to get the truck hung on a driveway approach when the dead axle lofts the drive axle because of the angles involved. Don't ask me to explain how I know that... Paul & Paula + Daisy the amazing wiggle worm dog... 2001 Volvo 770 Autoshift, Singled, w/ Aluminum Bed - Toy Draggin 2013 395AMP XLR Thunderbolt Toy Hauler 2013 Smart Passion 2012 CanAm Spyder RT 2013 Harley Davidson Street Glide Link to comment Share on other sites More sharing options...
Guest Lostinaz Posted January 9, 2015 Report Share Posted January 9, 2015 You can dump the air in the tag axle. Trucks like that get stuck easier in mud and snow. Ruan ran trucks like that into the mines around here and they would have trouble in the mud. Link to comment Share on other sites More sharing options...
SIBERNUT Posted January 9, 2015 Report Share Posted January 9, 2015 Called a "tag" if behind the drive, a "pusher" if in front. Many co's here in the northeast are going to a LIFT axle. Running a tanker or a usually-empty backhaul saves a bunch on tolls with it up. 2000 Volvo 635 A/S, N-14 Cummins"The Phoenix"'03 KA 38KSWB http://s918.photobucket.com/user/sibernut/library/?sort=6&page=1Furkids- Sibe's CH. Sedona & Tseika Link to comment Share on other sites More sharing options...
jkennell Posted January 9, 2015 Report Share Posted January 9, 2015 Yeah--I've seen that a lot recently, one axle on the truck AND tanker trailer up in the air. No camper at present. Way too many farm machines to maintain. Link to comment Share on other sites More sharing options...
sclord2002 Posted January 10, 2015 Author Report Share Posted January 10, 2015 Wow, what a great forum. You would think that I would be smarter by now with all the great info shared here. I guess I just started off in the hole, so to speak. Thanks for the replies. Great group of folks. Charlie Don't ever tell a soldier that he doesn't understand the cost of war. Link to comment Share on other sites More sharing options...
whatsnext Posted January 10, 2015 Report Share Posted January 10, 2015 I've only been paying attention to Volvo but you are talking about a 6x2 configuration. It's done to save on weight & increase fuel MPG while maintaining load & braking capabilities. 2016 Volvo VNL780 D13 I-Shift 2016 DRV 44 Houston 2015 Smart Cabriolet Link to comment Share on other sites More sharing options...
Rick & Alana Posted January 10, 2015 Report Share Posted January 10, 2015 Consolidated Freightways before their demise ran tag axles on the majority of their road trucks. Keep in mind a little history, consolidated Freightways started Frieghtways Motors which is now Freightliner Corporation. CF ways very innovative in their Maintainance thinking. They also started Pines Trailers to build their own trailers. With that said I would not run one in our application. I'd either go single or dual powered axles. IMO Rick and Alana Fulltimers 2018 Newmar Ventana 4037 2020 Jeep Gladiator 1997 Jeep TJ 2009 Mobile Suites 36RSSB3 formerly owned 2000 Volvo 770, 600 Cummins ISX,18 speed autoshift, 14 foot "garage" ET,Jackalopee,MaxBrake,Pressure Pro pro www.rickandalanasgreatadventures.blogspot.com Link to comment Share on other sites More sharing options...
noteven Posted January 12, 2015 Report Share Posted January 12, 2015 Edited - link to a document with pictures which I always like http://nacfe.org/wp-content/uploads/2010/11/NACFE-ER-1001-DeadAxle-Nov-2010-1.pdf "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
Deezl Smoke Posted January 12, 2015 Report Share Posted January 12, 2015 I've only been paying attention to Volvo but you are talking about a 6x2 configuration. It's done to save on weight & increase fuel MPG while maintaining load & braking capabilities. Exactly. And it works. I'm a work'n on it. Link to comment Share on other sites More sharing options...
LtSpaz Posted January 13, 2015 Report Share Posted January 13, 2015 I remember seeing a belt run between the duals from the driver to the tag so the tag actually became a driver without the differential. Firefighter, now retired, whoopee!!! RV Link to comment Share on other sites More sharing options...
rickeieio Posted January 13, 2015 Report Share Posted January 13, 2015 I remember seeing a belt run between the duals from the driver to the tag so the tag actually became a driver without the differential. Perhaps what you saw was a belt to clean out mud and debris so as the truck went back on the road he didn't sling mud everywhere. It's even been tried with chain. Not saying it's a good idea, but some folks will try anything. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
Deezl Smoke Posted January 13, 2015 Report Share Posted January 13, 2015 Perhaps what you saw was a belt to clean out mud and debris so as the truck went back on the road he didn't sling mud everywhere. It's even been tried with chain. Not saying it's a good idea, but some folks will try anything. No, it is a drive belt. They do exist and one local farmer has one. There is a name for it, but I do not recall it just now. I'm a work'n on it. Link to comment Share on other sites More sharing options...
Rick & Alana Posted January 13, 2015 Report Share Posted January 13, 2015 A drive belt between the drive axle and a non power axle was common in the 50's and before. The manufacturer was Silent Drive. Actually if you look at even older trucks they ran a huge "bicycle" chain between the axles to drive the rear axle. Now your making me feel old. Rick and Alana Fulltimers 2018 Newmar Ventana 4037 2020 Jeep Gladiator 1997 Jeep TJ 2009 Mobile Suites 36RSSB3 formerly owned 2000 Volvo 770, 600 Cummins ISX,18 speed autoshift, 14 foot "garage" ET,Jackalopee,MaxBrake,Pressure Pro pro www.rickandalanasgreatadventures.blogspot.com Link to comment Share on other sites More sharing options...
Guest Lostinaz Posted January 13, 2015 Report Share Posted January 13, 2015 Hate to have my arm on the window frame when it threw that belt... Link to comment Share on other sites More sharing options...
rickeieio Posted January 13, 2015 Report Share Posted January 13, 2015 Found it. Scroll down to page 2. http://www.aawheel.com/siteresources/data/files/sdap.pdf KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
Guest Lostinaz Posted January 14, 2015 Report Share Posted January 14, 2015 I love trucking history, trucks and their drivers built America. www.ATHS.org Link to comment Share on other sites More sharing options...
Deezl Smoke Posted January 14, 2015 Report Share Posted January 14, 2015 Found it. Scroll down to page 2. http://www.aawheel.com/siteresources/data/files/sdap.pdf Yep, that's it. Odd thing IMO. From what I'm told it does work, but only mildly. High hp trucks over power them pretty easy. But "back in the day".....they were put under a few gas powered trucks that ran in fields or up in the logging roads etc. Eventually tandem drive won out when lockers were made more robust and operator controlled. I'm a work'n on it. Link to comment Share on other sites More sharing options...
hdonlybob Posted January 14, 2015 Report Share Posted January 14, 2015 This is a really good informative thread Cheers, Bob 1989 Safari Serengeti 34'Towing a 1952 M38A1 Military Willys Past HDT owner Link to comment Share on other sites More sharing options...
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