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Gelecamion (Gelecamion)

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Posted on Sunday, February 27, 2005 - 10:30 pm:   

I busnuts around norths America finally today i got mine 4104 4068 out of the previos owner yard it was a tril to drive an steer Hamlet that is the name for my bus i been thinking for a good name in spanish like sppedy gonsales but for what i hear this busses are not know to be sppeedddy and pancho lopez is too long
well i drove my bus in the back roads to my job with an scort of to guide cars my partners in adventure my two siblings that alwauys are thinking that im crazy but today they where as exited as i was .
well i want to tell everyone thwe trill that i felt when i was behind
or i sould say in front of the wheels that is the first time that i drive something like this "a la mexicana" no isurance, no plates, no nothing just a icredible feeling of driving one of my dreams
but to my luck the rear pasanger front air bag started leking air so i got freaked out but i discovered an air shut of valve that the bus had so the bus was not level by no meands but it made it for the 5 mile run noe as i alwas i ask for help fron the guys that know more than me !!!!
thak you again
Gerardo
Stan

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Posted on Monday, February 28, 2005 - 8:25 am:   

After safely blocking up the front axle, remove the front wheel and jack the body up so that you can block the body up so that the air bag close to it'd normal ride height.

The easy way to change air bags is to cut the bag nuts off with a torch and use all new bolts. This will increase your cost by about $20.00. If you want to salvage the bolts you need to soak them with something like Liquid Wrench. Clean everything with a wire brush and then run a die nut down the exposed threads.

It is easy to loosen the nut but after two turns the bolt will drop out of the ring and and you need to clamp it in place with Vicegrips. If you have cleaned the threads well you shoulb be able to take the nuts off with you fingers after a couple of more turns.

New bags come with girdle ring moulded into the bag but inspect the clamp rings for damage or corrosion. Clean the mating flanges, top and bottom and install the new bag. When you order bags, you can order individual pieces (bag, rings, bolts, nuts, lockwashers) or you order an assembly where everything comes in one plastic bag. The assembly is a lot more expensive if you don't need all the parts.

It is a very simple job but lots of miserable places to work and not much room for tools.
TWODOGS (Twodogs)

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Posted on Monday, February 28, 2005 - 8:39 am:   

suggest replaceing both front ....later on...both back...usualy ,about 300.00 per axel...but they last 20 years...call Luke for parts...don't have his 800 number...somebody on this board will tho..
Todd Amon (Teqsand)

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Posted on Monday, February 28, 2005 - 11:47 am:   

YAAAA you got it on the road, great isnt it :-) glad to hear you are finally driving it, now you can come over to cal and visit me :-)

T
Stan

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Posted on Monday, February 28, 2005 - 1:21 pm:   

For a rough estimate on cost, figure on $100.00 for each bag and $1.00 per bolt. 16 bolts on each front bag and 24 bolts on each rear bag. It is a long time since I changed a bag on a 4104 but I remember a bracket under two of the top bolts. These two bolts are longer than the others and have to be ordered separately. Just to make you feel bad, when I got my first bus a Greyhound garage would change bags for $25.00 each (labor included).
Brian Brown (Fishbowlbrian)

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Posted on Monday, February 28, 2005 - 2:35 pm:   

I just pulled one off my new 4106 on Saturday. My removal was just a bit different than Stan's. I used a run-up block to get the bus up, then put a 20 ton bottle jack under the axle to raise it enough to compress the bag. There was lots of room under the bus that way, and I didn't have to remove the tire(s). I was surprised how easy the bolts came loose considering how rusty they were. There was enough slack in the air line to pull it out a bit to get to the fitting.

I'm ordering two new front bags from Luke today. Back bags still look good.

Good luck and BE CAREFUL. You can seriously die under there!

BB
John Rigbyj

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Posted on Monday, February 28, 2005 - 5:47 pm:   

Front bags are easy jack her up.Rear bags you need to remove the wheels block both the axle and the bus frame in several places, both sides.
When you order the bags be sure to get rings and nuts/washers and bolts. the bolts are difficult to get to on the back side. take your time.You may need a good nut buster.
BE SURE HAVE AN AIR BAG LEAKING AND NOT A BEAM.
John
Stan

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Posted on Monday, February 28, 2005 - 8:14 pm:   

4106 doesn't use the same type of bags as the 4104. It is a completely different procedure and your advice doesn't help the man changing a bag on his 4104. It would be more help if you started a new thread when you talk about a different subject.
John Rigbyj

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Posted on Monday, February 28, 2005 - 9:17 pm:   

Stan.
I was writing about my 2 4104,s
John
Gelecamion (Gelecamion)

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Posted on Tuesday, March 01, 2005 - 12:44 am:   

thank to you ALL I DO NOT know if i specified is the back airbag pasanger side and when i felt it leaking air is the uper purt of the bag right where it meats the crown or the bolts it is a really big gap because the iar get depleated really fast or the air presure doesn not go over 30 psi in the gauge in the front panel
so i willl refere to the masnual tonite
tahnk you all
john rigbe can you give me your cell phone again as well as you tod
i lost mi phone so the new one did not have all my pressious numbers
Stan

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Posted on Tuesday, March 01, 2005 - 8:12 am:   

John: My comment was about Brian's instructions on changing 4106 bags.
Brian Brown (Fishbowlbrian)

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Posted on Tuesday, March 01, 2005 - 11:28 am:   

Now, Gerardo, maybe I'm not qualified to advise you of this, since I don't have the exact same bus as yours, but you'd be wise to safely block up your bus so you can get under it and then use a bottle of soapy water and spray down everything that can move or hold air... airbags, leveling valves, lines, tanks, valves, etc. You need to know exactly what's leaking. You should use a shop air supply to do this so you can actually hear AND see the leaks.

The above advise should be applicable to '04s, '06s, even Buffalos and any other GMC bus with airbrakes. Heck, MCIs and even Eagles ('cept the bags and levelers on those birds)... *smile*

And please do not drive the bus again until it can pass a DOT-like pretrip inspection. You're endangering the lives of yourself and fellow motorists to drive a 25,000# leaky bus.

Lecture over,
BB

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