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Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

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  #11  
Old 10-08-2014
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Originally Posted by al perna View Post
Neal ,

I could be wrong , but I do not think the steerable or lift tag would make a turn any tighter . It will reduce uneven wear on your tag axle tires but, I do not see how it would change the pivot point of a turn .
It may not make it turn tighter,but i sure think it does!
Maybe we need to do a test,just for fun!
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  #12  
Old 10-09-2014
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Quote:
Originally Posted by al perna View Post
Neal ,

I could be wrong , but I do not think the steerable or lift tag would make a turn any tighter . It will reduce uneven wear on your tag axle tires but, I do not see how it would change the pivot point of a turn .
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Originally Posted by Randy Dupree View Post
It may not make it turn tighter,but i sure think it does!
Maybe we need to do a test,just for fun!

According to this, the steerable axle and lifting the tag both reduce the turn radius:

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  #13  
Old 10-09-2014
al perna al perna is offline
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Originally Posted by Dieselbird01 View Post
According to this, the steerable axle and lifting the tag both reduce the turn radius:

How about that , I was wrong Now don't tell Erika haha , I keep telling her I am never wrong

I guess the drag of the non lift or steer increases the turning radius . Makes sense

thanks John , Ron & I are working on getting our steel Axles working again .
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  #14  
Old 10-09-2014
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Quote:
Originally Posted by al perna View Post
How about that , I was wrong Now don't tell Erika haha , I keep telling her I am never wrong

I guess the drag of the non lift or steer increases the turning radius . Makes sense

thanks John , Ron & I are working on getting our steel Axles working again .
My statement that the radius was reduced was solely based on the "feel" compared to my WB40. Glad to see my feel was correct !
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  #15  
Old 10-09-2014
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I saw a informal demonstration of a steering tag when BB first started installing them on seated coaches, it was pretty amazing
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  #16  
Old 10-09-2014
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It is amazing how sharp my bus will turn.
I got used to it (and so has Carol) and one day the axle lock did not release,i hit a few curbs before i figured it out.
All those curbs at the walmart rv park are not a worry anymore!
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  #17  
Old 10-09-2014
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Quote:
Originally Posted by al perna View Post
Neal ,

I could be wrong , but I do not think the steerable or lift tag would make a turn any tighter . It will reduce uneven wear on your tag axle tires but, I do not see how it would change the pivot point of a turn .
Lifting the tag like on my '99LXi43 effectively shortened the wheelbase and allowed parking in much tighter spaces than I could get into with my '90PT40. I never studied the physics of this, just enjoyed the better maneuverability. If a tag is scrubbing I would think the pivot point was effectively at a point behind the drive axle where, with the tag lifted the pivot is the center line of the drive axle. Again, I don't really know but it sure did work.

The '99LXi43 had two sets of air bags on the tag. One set would pressurize to carry weight and the second, after the first set was deflated, would lift the axle about 4" off the ground. All was done with the push of a button and would automatically go back to normal drive mode at 15 MPH.
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  #18  
Old 10-09-2014
Gannet Gannet is offline
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Is it possible to add the lifting feature to an early model like a PT? If so, how hard?
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  #19  
Old 10-09-2014
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Originally Posted by Gannet View Post
Is it possible to add the lifting feature to an early model like a PT? If so, how hard?
I did it way back in 1997.
I did it when BB came out with the lifting axles on the 97,just because i could.
Would i do it again?
No.
I was younger then,full of energy and just wanted to mess with the other Bird owners.

Its easy enough to do,i used lift axle springs off a dump truck,made a bracket or two and increased the tag axle air pressure to over come the springs tension.

Its not worth the time..
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  #20  
Old 4 Weeks Ago
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This seems like as good a thread as any to post proof that there is, in fact, such a thing as a dumb question. :-) Here goes:


Some LXs or LXis have the wheel on the tag axle "dish side out", whereas others have the "flat" side out. Why is that?


And, to further demonstrate my inability to grasp the obvious, I offer this:


All Wanderlodge tag axles are behind the drive axle. Some manufacturers put the tag in front of the drive axle (frequently called a "bogie axle" in the US). The chief benefit I can come up with for the tag in front (bogie) is that it simplifies the driveline because you do not have to transmit engine power over the tag axle and into the drive axle. The chief benefit I can come up with for the rear-mounted tag axle is that the bus is capable of making a turn. What are the real pros and cons? Eagle buses seem to be the most common bogie installation, and Eagles are pretty doggone neat.
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