tag axle

dieseless · 12-03-2010, 06:02 PM

has anyone ever out a tag or pusher axle on a semi. i just got a overweight ticket and need to put a pusher on asap. i went to a semi junk yard and they are cutting me off one monday that is a bolt on type. i have a controller lined up for air up and air down like my pusher will be but i need some help with mounting and hooking up the air for the brake and bags thanks

cornman369 · 12-03-2010, 09:33 PM

what do you need help with specifically?
ive done a few before i jumped the fence to the parts yard
ch

dieseless · 12-03-2010, 09:56 PM

placment and what is the best why to tee off the rear brake lines to run the brakes on the tag. my state law says anything less then 40" cinter to cinter is a singel axle so i just have to be liek 43" cinter to cinter from my drive to my tag and im ok right?

***mikeshauling*** · 12-03-2010, 11:18 PM

I put a drop on an 85 MACK dump truck. I got lucky and got a complete setup from a donor truck, hoses valves , controller. I just hooked it up like i took it off and had to tee into the air lines. Try to let the junkyard know that you need ALL the valves that are on the frame and hooked to the axle, as well as the cab controller...

cornman369 · 12-04-2010, 12:07 AM

you said less than forty inches is considered a single axel?
or closed tandem? What state are you from?
anyway, just tie your brake lines like your rear axle.
Its been awhile since a new install (and most of our drop axles are on trailers) but if irrc the air supply if from the emegicy line (well I guess it has to) just make sure you have all the solenoids, dump valves, and a down pressure valve, start low like forty psi.ive blown bags with as little 85 psi on an unloaded trailer. granted it was old but still not a fun experience.
ch

dieseless · 12-04-2010, 09:52 AM

im from iowa. its said under 40 inchs is a singel axle. all the yard had is the frame mounted vavles and axle i need the controller and dumb vavle which will be new along with the air bag and tires i may replace the brake parts too. my truck only has air brakes no air ride so will it still workt he same

cornman369 · 12-04-2010, 10:42 AM

yea, it will work the same.
all your doing is providing air to hold the axle up/down depending on which way the switch is flipped.
90% of our trailers are spring ride will air drops. just tap the tank for air, wire it, be done
ch

dieseless · 12-04-2010, 10:45 AM

how do i hook up the brake on the tag axle. i have read that you should never just tee off the rear brake lines that this could throw the brakes out of blance or something idk

***mikeshauling*** · 12-04-2010, 11:12 AM

If you TEE into the brakes, TEE into a main line. Try not to TEE into a line thats already been split off to one of the brakes.

Bluedually4x4 · 12-04-2010, 01:39 PM

^^ Agreed. Weight laws are strange in some states. Was it a single axle over load? Some times you can fudge it a little by adjusting the 5th wheel.

I only have fixed trucks, so I don't really get the 40" center.

cornman369 · 12-04-2010, 06:39 PM

i think he means 40" from center hub of the first axle to the second axle
i could be wrong thou
ch

dieseless · 12-04-2010, 09:49 PM

yea you right.. i drive a stright truck with a tank on it i was 5900 over my rear axle i can go 20000 i was 25900 i was fine on my steers

Quote:

Originally Posted by cornman369

i think he means 40" from center hub of the first axle to the second axle
i could be wrong thou
ch