Tag axles
 

Tag axles

Started by Jim Blackwood, June 03, 2018, 08:53:16 AM

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Jim Blackwood

OK, this may be a stupid question but I'm just curious enough to ask. Given that tag axles do have a few downsides and the main upside is increased load capacity, and given that a conversion is never going to be carrying around 10,000lbs of passengers, and that I've frequently heard you can chain up a tag if you need to:

Has anybody removed the tag axle?

May be an odd question to ask. But why wouldn't you consider it? It goes along for the ride. It requires tires and brakes plus moving joints and suspension. If it was gone there'd be more storage space. Bus might even turn a little tighter.

Whadaya think?

Jim
I saw it on the Internet. It MUST be true...

luvrbus

A tag does not only carry more load it stabilizes the ride and drive, a bus with a chained up tag is a handful to drive,the wheel base is setup for a tag because of the overhang at the rear also,if you want a bus without a tag it's best you buy one     
Life is short drink the good wine first

chessie4905

The only one that you can safely do it to is a GMC 4905 as they were designed to carry less of the load than the others. In some states, they were needed. Most of them are two axle jobs.You could find a factory two axle MCI.
GMC h8h 649#028 (4905)
Pennsylvania-central

Phuriousgeorge

Tags assist heavily with crosswinds as well, I wouldn't recommend it.
Tearin' up Texas - Granbury, TX

"Van Hooligan" - Project page
1996 Van Hool T815 40'


Cummins M11 - 370HP
4-Speed Auto Allison

Jim Blackwood

OK, I was just curious. Not that I'd do something like that you understand, sort of strikes me as more of a "Big Job". But I know people do a bunch of crazy stuff and I just wondered. The feedback about driving a chained tag being a handful was probably as relevant as anything.

Jim
I saw it on the Internet. It MUST be true...

luvrbus

Quote from: chessie4905 on June 03, 2018, 09:05:57 AM
The only one that you can safely do it to is a GMC 4905 as they were designed to carry less of the load than the others. In some states, they were needed. Most of them are two axle jobs.You could find a factory two axle MCI.

The 4905 didn't have a tag it was a boogie axle in front of the drive axle in the 3rd bay lol a Eagle thing but Eagle didn't lose a bay with theirs 
Life is short drink the good wine first

lostagain

Tags also have brakes to slow the bus down...

JC
JC
Blackie AB
1977 MC5C, 6V92/HT740 (sold)
2007 Country Coach Magna, Cummins ISX (sold)

DominicM

I used to work for a company that had a snooper truck that had a tag axle. When the truck was working you would pin the tag axle up so that you could go in reverse with out damaging anything. Once you were done using the snapper application you would just unpin the tag and allow it to come back down.   But leave it to the drivers to forget to pin the axle and still damage something in the system time and time again.
67 MCI 5A
I live in Nashville,  and Reside in my 5A in Big Spring TX for work at the moment,  Will update as I move around.

DoubleEagle

The work required to take a tag or bogie axle out and make it look presentable would not be worth the small amount of space you gain. I recommend not trying to re-invent a bus you don't even have yet.  ::)
Walter
Dayton, Ohio
1975 Silvereagle Model 05, 8V71, 4 speed Spicer
1982 Eagle Model 10, 6V92, 5 speed Spicer
1984 Eagle Model 10, 6V92 w/Jacobs, Allison HT740
1994 Eagle Model 15-45, Series 60 w/Jacobs, HT746

chessie4905

With all the bay space in 4905's, probably wasn't much of a bay loss. I don't think that there were many built that way Did the MCI mc-6 have a bogie? I saw one yesterday and that tire was a couple of sizes smaller.
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

The MCI 6 had a tag and the tires were smaller,new they covered on most of the 6's
Life is short drink the good wine first

Jim Blackwood

I know I've seen a few trucks on the highway that don't lower the extra axle unless they are heavily loaded. (and then there are concrete trucks...)

Jim
I saw it on the Internet. It MUST be true...

chessie4905

Looked it over inside also, I sure wouldn't ever considering converting one with that floor setup. those roof astro lites were only angled about 15°. They were painted over. You wouldn't benefit from them as a passenger, other than glare in the eyes or to look at the sky.
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

Quote from: Jim Blackwood on June 03, 2018, 12:13:33 PM
I know I've seen a few trucks on the highway that don't lower the extra axle unless they are heavily loaded. (and then there are concrete trucks...)

Jim

If you look close those axles steer too on concrete trucks 
Life is short drink the good wine first

pabusnut

My 4905 had a bogie when I bought it.  Per the book, it added 5000 lbs of capacity, but weighed 2200 itself.  Since I don't need the weight carrying capacity, I tore it out and built a floor.  All my utilities are now in that one bay, leaving the two bigger ones free to haul essentials(or junk).


Steve Toomey
PAbusnut