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Old 01-17-2018, 08:17 PM   #1
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Air Bag on 2000

I put in new rear air bags in my 2000 alpine today. The back's only but they were worn. Not too difficult but glad I had an battery impact wrench (removing rear tires would be easier but not needed). The old bags were heavily cracked from the outside at the lower fold but still lightly cracked on the inside (after cutting into them). They are one layer only with reinforcing layers of nylon thread). Replaced with stock units of Firestone w01-358-9482 . 90k miles and 2000 model. Bought from Michigan Truck Spring at $419.20 and from other dealers as much as $620.
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Old 01-17-2018, 08:22 PM   #2
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Good Deal! Feels good to be able to do your own work, Don't It?
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Old 08-11-2018, 10:24 AM   #3
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I just read you post about rear air bag replacement. I have a 2005 36' and need to replace the front bags for sure and possibly the rear. BUT finding the correct part number is a real chore. Did you know the part number before you removed your's? If so were did you find it?

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Jim
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Old 08-11-2018, 11:28 AM   #4
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The best prices and selection I found is SDTruckSprings.
Replaced both front bags with Firestone Airide Replacement Air Spring - w01-358-9039 (for 2006 40' Apex)
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Old 08-11-2018, 03:56 PM   #5
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HOW TO?

Bought Firestone front bags for our 2000 Alpine 140,000. About change them. When temp cools down.
What procedure do I use to remove the lower bag nut. No room for a wrench or socket. Do I need to remove or loosen the 4 nuts below the axel? Will one end of the shocks need to be removed? Do one at a time?
Any other magic tricks would be appreciated.
Purchased ours from Western Truck same as Jay Bennet.
One of the bags has a round 1/2"wear spot. Also both are cracking.


Gary
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Old 08-11-2018, 07:20 PM   #6
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The front lower bag nut is 1 1/8. I use a box end wrench that I modified by heating-up and removing most of the offset. See pictures.....
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Old 08-12-2018, 10:57 AM   #7
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Air Bag

Gary:

I have the same problem with removing the bottom nut. I finally took 1 1/16 box end wrench and modified it until it would fit in the opening and onto the nut.

I ground almost all of the steel on the sides of the wrench and then cut the end off making it like an open end wrench, it took a lot of grinding until it would fit into the opening and down over the nut. You have to expand it enough to fit the 1 1/8 nut difficult but it worked in that limited space around the nut.

I tried to attach a photo of the wrench but can’t seem to make it work. If you are interested, send me a PM and I can send it via e-mail

Jim
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Old 08-12-2018, 07:19 PM   #8
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Quote:
Originally Posted by Pollo man View Post
Bought Firestone front bags for our 2000 Alpine 140,000. About change them. When temp cools down.
What procedure do I use to remove the lower bag nut. No room for a wrench or socket. Do I need to remove or loosen the 4 nuts below the axel? Will one end of the shocks need to be removed? Do one at a time?
Any other magic tricks would be appreciated.
Purchased ours from Western Truck same as Jay Bennet.
One of the bags has a round 1/2"wear spot. Also both are cracking.


Gary

Part numbers? Front and rear?
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Old 08-12-2018, 07:44 PM   #9
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bags

Gary,

Thank you for the Pics.
My super expensive Harbor Freight 1 1/8" would not go on until I ground off the outside diameter. The leaf spring was in the way.

Wrench fits in without bending.

I was surprised at how easy/loose. More than finger tight but not much.

Rich,
I am using the Firestone WO1 358 9039 on the front.

Gary
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Old 08-13-2018, 04:56 AM   #10
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Gary

I had a tough time getting the top nuts off the bag. Decided to remove the single bolt that holds the top bracket on the frame, when I did that the whole assy almost fell out in my lap. That made disconnecting the brake line simple.

When you get the driver side bag out, I recommend to look and see if your coach has a bolt head on the bottom of the frame right next to where the bag is located. It would be aft of the bag but close enough to make contact with the bag. That bolt head is what wore a hole my bag. I am going to round off the edge of the bolt to make more clearance and not touch the bag. My coach is a 36' so maybe yours doesn't have the same issue.

Jim
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Old 08-13-2018, 08:34 AM   #11
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Quote:
Originally Posted by Pollo man View Post
Gary,

Thank you for the Pics.
My super expensive Harbor Freight 1 1/8" would not go on until I ground off the outside diameter. The leaf spring was in the way.

Wrench fits in without bending.

I was surprised at how easy/loose. More than finger tight but not much.

Rich,
I am using the Firestone WO1 358 9039 on the front.

Gary
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Old 08-14-2018, 11:46 PM   #12
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Quote:
Originally Posted by Pollo man View Post
Bought Firestone front bags for our 2000 Alpine 140,000. About change them. When temp cools down.
What procedure do I use to remove the lower bag nut. No room for a wrench or socket. Do I need to remove or loosen the 4 nuts below the axel? Will one end of the shocks need to be removed? Do one at a time?
Any other magic tricks would be appreciated.
Purchased ours from Western Truck same as Jay Bennet.
One of the bags has a round 1/2"wear spot. Also both are cracking.


Gary
I just replaced the front bags today. I took the front wheels off and dropped the spindle one side at a time. I used a bottle jack under the spindle to lower it and removed the bottom plate with the bag. Also removed the lower shock bolt to get extra room to replace the bag. The first one I didn't remove the sway bar mount and wish I did because it made it much easier replacing the 2nd one. The bottom bag nut and bolt were rusted and took a while to remove with a 1/2 inch impact driver once it was out. I couldn't imagine using a wrench in that tight spot to remove the rusted nut. It's not a fun or fast job. Use penetrating oil the early. The new bags are hard to compress so you will want as much room as you can to get them in place. It's a good time to lube the chassis as well. Good luck with yours.

Randy
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Old 08-15-2018, 05:02 PM   #13
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bags/aprings

Info for changing the bags on our 2000 Alpine 38'.
Started with the bags aired up. Placed 4" blocks under the jacks and raised it all the way up. Next dumped the air.
Removed the air line and fitting and then the 3 nuts . Ground down HF wrench worked great.
Bag came right out.
Installation started with the two top nuts but without the metal mount that comes with new bags. Next squeezed in the bottom mount. Tight fit but a can-do.
Used my home compressor & air gun to blow up the bag and shove the lower stud into place.
Harder but with patients install the lower nut.
Reinstall the air fitting and line.

This, for me, was a 3hr job plus an hour digging out the right tools.

On top of this checked air ride height

Gary
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Old 09-19-2018, 02:01 PM   #14
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Looking for a part # for the rear air bags on a 2007 model..
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