6610 4x4 front wheel bearing problems, please help.

Bob2444

New User
I recently discovered a sloppy wheel bearing, right front of my 6610, 4x4. The shop manual doesn't show a way to load the bearing. Can't figure out how the hub is tightened by looking at it, to load the bearings. It has a planetary gear reduction outer hub. Any ideas, or help on this would be awesome. Thanks in advance. I'd rather not have to pay fora service call if I could possibly get it myself.
 
Paying a service call at this point is the least of your worries... The bearings are gone in the hub it the hub is loose... or else the bolts are backing off in the carrier and about to drop and make BIG MESS. You need to lay her up now, NOT NEXT WEEK... and pull that hub apart and see what's going on in there before it destroys something made of unobtainium. If $hithouse luck is still on your side all you'll need is bearings and seals. Worst case it could have already spun the bearings and reduced the ID of the swivel casing... and I don't think that can be bought any more for some of those ZF axles although it may still be available for the later Carraro's. You also need to get all of the info off the axle tag and the hood tag (unit number) before you go ordering parts as there were several variants used over the span of the 10 series that are all different....

Rod
 
(quoted from post at 20:25:11 05/24/15) Paying a service call at this point is the least of your worries... The bearings are gone in the hub it the hub is loose... or else the bolts are backing off in the carrier and about to drop and make BIG MESS. You need to lay her up now, NOT NEXT WEEK... and pull that hub apart and see what's going on in there before it destroys something made of unobtainium. If $hithouse luck is still on your side all you'll need is bearings and seals. Worst case it could have already spun the bearings and reduced the ID of the swivel casing... and I don't think that can be bought any more for some of those ZF axles although it may still be available for the later Carraro's. You also need to get all of the info off the axle tag and the hood tag (unit number) before you go ordering parts as there were several variants used over the span of the 10 series that are all different....

Rod

Thanks Rod, the hub is apart and the tractor is laid up. So, from your post I can gather that there is no pre-load like an auto bearing ie: the torque spec sets the load on the bearing. The hub appears to still be in good shape. I can't get the ring gear pulled from the hub assembly, but all of the ring gearbolts were tight. Should I pull the hub at the king pins and just take that part to the shop? Thanks again.
 
We really need to know what axle you have, ZF or Carraro. Get the make and model off the tag and post back, as there are at least two variants of the ZF. If it's a ZF, it's most likely a APL325.
 
APL 325 axles had issues with the ring gear dowels collapsing and allowing the ring gear bolts to come loose. Check to make sure your dowels are solid and not split, like a roll pin.

If the ring gear bolts were tight, then I suspect you simply lost the oil out the seal and the bearings went out. If you're lucky, that's all the damage.
 
Going back, is there a way to "tighten" the bearing? I don't see how it will stay tight, since that back plate of the carrier doesn't tighten to anything. It seems to float on those bearings.

None of the dowels were crushed.

Thanks again.
 
You are correct, there is no way to tighten those bearings. If the ring gear is tight up against the spindle, and nothing else is worn, then the only reason for loose wheel bearings would be worn bearings. Be sitting down when you price those bearings, or any other parts of that axle for that matter.
 
The bearings are about ~300 for the set. The seal is the real obscene part... I think the mafia wants somewhere over 200 for that alone. For what it's worth.... chase that seal from A&I. I scored the part number on mine through some research and got he same exact seal in a Deere bag, through the A&I price structure for around 20 bucks. Mine is an APL 345 but I think it's the same seal in the 325....
Ring and planets are NLA through NH and only source I found was china quality through A&I and one other source through parts spring I think..

Rod
 
Be careful about just going to deere tho... Deere is just about as violent as NH in their main parts system... Last year I bought a seal from NH. One from Deere's main line and then another from the same dealer through the A&I line. The seals came from two sources in the same bag, with the same part number at two WIDELY different prices.

Rod
 
Thanks everyone, you have been a huge help. The hub is off and at the NH dealer. He is good about sourcing parts, so hopefully it won't hurt too bad. Thanks again.
 
Nah Rod, he has sourced bearings right from Timken for me in the past. Real good guy. Thanks again.
 

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