Glad Hand Tire Inflation Unit For The Truck?

Please show me where it is illegal to leave tandems at the rear when dropping a trailer. Most customers today want the tandems at the rear when loading and unloading.

 

Probably not 'illegal', but certainly is a good practice for heavily-laden trailers. If you've got, say, 45,000 lbs of freight in your trailer and your tandems are slid all the way back to the ICC bumper, that means you have 22,500+1/2 the weight of the trailer on your landing pads. Figuring about 13,000 lbs per pad, over about 5" x5", that works out to over 500 lbs/sq. in. On a hot day, even asphalt might allow it to sink in. Sliding your tandems forward could move about 3 tons off the landing pads.

 

While you're getting one of those pick up some jumper cables too. Way better to have this relatively cheap one time purchase gear on hand in case you need it in a pinch.

 

Why did you add "when dropping a trailer" to my comment? Most customers wants freight delivered with no cost, is that how things work? Is what customers want the one factor that decides the issue? I intended my comment to be about about how many times I've seen trailers on public roads with their tandems still fully at the rear of the trailer. Every year I saw more of this than the previous year. I'm sure that one reason we don't see it true for a majority of trailers on the road is most newbies haven't even thought of why they would move trailer tandems except to get a legal axle weight or comply with "the bridge law/kingpin law" or whatever they are calling the regulation about how far forward or back tandems can be set. Call that regulation whatever you want as there are 12 or more names for everything in trucking and the people using it insist all other names are in error or don't exist.

 

I’m a little confused on your take. It appears that you believe kingpin to rear axle laws and bridge formula (Bridge Law) are the same thing.

 

If you wanna make your day easier, tap the brakes until the compressor kicks on when doing the steers. Air up for 10-15 seconds and then repeat.

Getting drives and/or trailer to 100 doesn’t take long at all though

 

Marlack's R Model Macks had double compressors and used the engine compressor to off-load tankwagons. Single casting that looked like two compressors inline. Went back to Ross [?] in Ohio for rebuild. Sent bobtail with a trainee to a residential transformer post lightning strike cluster of spotted wagons and the power companies transformer oil rejuvinator on a tiny transformer site. The trailer had one diaphram blown and we were able to release the brakes and pull it out and move it to a place where the mechanic could safely work on it with out the low air warning due to double he amount of compressed air.

 

Simple, when you pick up a trailer then obviously how it ran down the road prior is unknown, and irrelevant. As far as what the customer wants; if you're running drop and hook then you either do what they want, or it doesn't get loaded.

 

Or yard jockeys at large DCs. Many require the tandems to be slid all the way back when loading/unloading..