Campaign Service Bulletin

[MA4529]

Just got this in the mail CSB07-340-011B
A condition exits where the tag axle cover may melt. The correction is to replace the wheel bearings.

I had my tag axle covers melt on the way home from the dealer in NC. They were replaced under warranty. They were melted and leaking gear oil. Sounds like there is a serious problem with the wheel bearings. I wonder if this has anything to do with the problem I have keeping the "High Hats" from flying off. This is my second set in 4000 miles.

[MA4529]

Just got this in the mail CSB07-340-011B
A condition exits where the tag axle cover may melt. The correction is to replace the wheel bearings.

I had my tag axle covers melt on the way home from the dealer in NC. They were replaced under warranty. They were melted and leaking gear oil. Sounds like there is a serious problem with the wheel bearings. I wonder if this has anything to do with the problem I have keeping the "High Hats" from flying off. This is my second set in 4000 miles.

[bcbounders]

Do you have any information on the chassis/model years this CSB applies to?

[MA4529]

MM and K2 chassis with tag axle and a VDM of March 17 2006 through june 25 2007 2 hrs is allowed for this repair

My VDM IS 4/9/2007

[Mrboo]

Had my tag axel bearings replaced twice. First time the axel end play was not adjusted to correct tollerance. Is supposed to be 2-5 thousandths.yes it does melt the hub seal.rich

[Mrboo]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by MA4529:
Just got this in the mail CSB07-340-011B
A condition exits where the tag axle cover may melt. The correction is to replace the wheel bearings.

I had my tag axle covers melt on the way home from the dealer in NC. They were replaced under warranty. They were melted and leaking gear oil. Sounds like there is a serious problem with the wheel bearings. I wonder if this has anything to do with the problem I have keeping the "High Hats" from flying off. This is my second set in 4000 miles. </div></BLOCKQUOTE>
The "high hats" are a problem when you have them off bend the c-shaped retainers a little tighter. Check them as often as you check hub temperature. Rich

[clnhse]

when I brought mine in for the slack in the steering the shop noticed the tag bearings were bad.....Just like you said there is a heat ring that they noticed had changed color.