Just had coach serviced. Should this concern me?

Jim Eh. · July 05, 2016, 07:47:40 AM

^^ To press the new studs in/out rather than using a BFH.

Sometimes the axle drive stud comes out when removing the nut. And then when re-installing the studs "sticks" and the nut travels further down the stud. Result = less threads holding the stud in the hub. Some of those look like 2 or 3 threads maybe holding them.

Definately wrong cones. There are split and solid types available. It appears the ones used are the solid type. They may be the wrong degree of taper and although the stud/nut tighten up the cones are not sitting in full contact with the taper of the hole.

eagle19952 · July 05, 2016, 09:03:08 AM

i hope a few things...like not far and stop and go high speed to take it back.

i would make them come repair it on site. or pay a tow.

or risk ruining the hub...or axle.

or worse..run the pumpkin out of oil...and kill the diff..

robertglines1 · July 05, 2016, 10:56:09 AM

am I the only one seeing a air gap between stud/wedge and flange? Scott I would do it myself with use of a good torque wrench. Over-tight=pulled stud threads.

opus · July 05, 2016, 05:26:35 PM

Did they actually leave your wheels dirty like that or is that fresh oil from the trip home?

gumpy · July 05, 2016, 06:50:35 PM

Quote from: opus on July 05, 2016, 05:26:35 PM
Did they actually leave your wheels dirty like that or is that fresh oil from the trip home?

Appears they rotated some tires. That wheel has been run as an inner dual (or on a tag or steer).

B_K · July 05, 2016, 08:10:47 PM

Honestly I'd be afraid to take it bag to that shop to LET them redo it!
I mean it's plain and easy to see they didn't get the axle back on the hub properly! And it don't matter if it's a bus or truck that's a simple job that ANY TIRE jockey should be able to handle let alone an experienced truck mechanic!

How do we know the really pressed the new studs in properly? Or did they used the retaining nuts and a big @$# impact to pull them back in?
OR DID THEY REALLY GET THEM BACK IN RIGHT AT ALL? (I mean look at the hub!)
Sorry just my opinion!

BK

Scott & Heather · July 06, 2016, 09:01:27 PM

I have no idea what really went on. The head guy did the passenger side and it looks fine. The drivers side was done by someone else and we don't know the status of that side. As for the dirty rim, it was a used rim I bought. It looked like that before I had it installed. Will be polishing them later. Low priority right now.

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easystreet · July 06, 2016, 09:50:26 PM

Did they refill your hubs with oil after they had them apart or are you running grease packed bearings? With the axle flange stud nuts / cones that loose that hub should be throwing oil all over from between the axle flange and hub face. Look around the circumference of the hub in the valleys between the humps that the studs are screwed into and see if there is a fill plug. Usually they are a hex socket head plug. It may be concealed under the outer wheel so you will have to look closely. If you find the plug and it obviously hasn't been out I would be leery of going very far. Check the side that appears to have been assembled properly to see if the plug was removed on that side. The only other way to get the initial fill of oil out into the hubs is to top the differential up, run the unit up on thick blocks on one side to tip the housing and leave it parked that way for several hours allow gear lube to run down the axle tube and into the hub. Then repeat for the opposite side. Definitely ask some questions about exactly what was done and how it was done. Despise shops that "learn" on customers equipment. Hope no damage has been done.

Scott & Heather · July 07, 2016, 08:20:21 PM

Don't know the answer to this. I'll check for the plug. I remember my 9 had plugs. I never serviced the axles on the 9. They filled all of my other hubs with oil, so I'm assuming the drive axles are greased bearings. When they had it out, they looked greased to me but I honestly don't know what I'm talking about

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gumpy · July 08, 2016, 06:37:24 AM

I don't know for sure, but I know the 9 has oil bearings on the drive axle. I can't imagine they changed that on the 102.

He's right. If they didn't give the hubs their initial fill of oil, you could well burn up your bearings. Although, depending on how far you drove, the damage might already have been done.
It does't take long for a dry bearing. I know a shop that had a mechanic who refused to fill the hub. He claimed it was not necessary. Turns out he was wrong on a
customer's bus. The phrase "had a mechanic" in the first sentence are the operative words there.

You said the "head guy" did the one side and it looks right. Honestly, I think I would call him and have him come look at the bus where it is and determine if it's correct or not, and if
it's safe to drive. Let him make the determination, and let him take the risk and responsibility.

luvrbus · July 08, 2016, 07:05:54 AM

My DL3 has the plug in each axle not the hubs,most shops pack the bearing with grease instead of depending on the grease to lube the bearings on a fresh install it is sorta of a safety blanket for shops

eagle19952 · July 08, 2016, 09:02:53 AM

Quote from: luvrbus on July 08, 2016, 07:05:54 AM
My DL3 has the plug in each axle not the hubs,most shops pack the bearing with grease instead of depending on the grease to lube the bearings on a fresh install it is sorta of a safety blanket for shops

depends...some grease won't allow the gear lube back into the hub...if it came with oil..use oil...

luvrbus · July 08, 2016, 09:15:21 AM

Quote from: eagle19952 on July 08, 2016, 09:02:53 AM
depends...some grease won't allow the gear lube back into the hub...if it came with oil..use oil...

I am not talking about that can of packing,the gear oil will clean the bearing of the grease I have checked that before and nothing bad shows up in sample either.All the buses I been around with greased rear hubs have a special seal to keep the gear lube from washing the grease out YMMD

chessie4905 · July 08, 2016, 10:44:14 AM

Our 4104 had a seal that ran on the smooth surface at very end of axle tube. It was or the same diameter as the hub with holes for the axle shaft studs to go through.The bearings rode in grease. We used Mobil semi fluid synthetic grease. I prefer that setup on mine as no gear oil on brakes from seal fail. A wet rear brake on a 4104 will SIGNIFICANTLY reduce braking power. And what a mess to clean up.

brmax · July 08, 2016, 11:09:01 AM

Them hub plugs for oil drains, and axle cap plugs also are the upper crust. They may only cost another $buck to machine, but actually guys they are on very few that I seen.
The teaching I was lucky to get for the bearings, was to grease proper then install follow up with a seal. I am always up for learning but if the hub comes off it gets a seal if I have anything to do with it, and so the basic teaching comes in to play and grease the bearing.
I was taught these things when it was "their way or the highway" ; )
The small 1qt jugs seem handy I thought for the hub fill, if out on the roadway working. Sure doesn't take much maybe a 1/4 pint, I actually never measured it, was actually more concerned with checking the diff level afterward.