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Hi, got a problem with the gear hardening failing on my tractor (yes, with 4 wheels, diesel engine and everything else a farmer dreams of 
)
A couple of months ago a PTO gear needed to be replaced, today was informed there's a noise in the front diff, most likely it'll be the same cause. The noise could be front the diff itself, or either hub reduction gear, either way the axle gotta be pulled apart.
Ok, so the ol girl is 13 years old, done 13000 hours or so, and the PO was a bit slack with a few oil changes and other general maintenance.
So the question is, is it to be expected, the hardening on gears to wear, due to age, abuse, whatever? Or was the thing built to a price and it's now falling apart? I need to talk to the shop and don't want to appear too stoopid. I want to suggest to them that it's a quality issue, but the trouble is they KNOW the full history of the thing and will be pushing the PO's lack of care. (I bought it privately at a deceased sale) Yeah I know everything is against me.
Can the gears be rehardened? If they aren't worn of course
Other machines I've had haven't had this sort of problem, but I've not had them quite so well used and have always kept up with their maintenance.
So there is someone out there with a spot of knowledge they're willing to dispense
Look, I've included pictures
Thanx
David
What I got at the moment
What I might have to use
)A couple of months ago a PTO gear needed to be replaced, today was informed there's a noise in the front diff, most likely it'll be the same cause. The noise could be front the diff itself, or either hub reduction gear, either way the axle gotta be pulled apart.
Ok, so the ol girl is 13 years old, done 13000 hours or so, and the PO was a bit slack with a few oil changes and other general maintenance.
So the question is, is it to be expected, the hardening on gears to wear, due to age, abuse, whatever? Or was the thing built to a price and it's now falling apart? I need to talk to the shop and don't want to appear too stoopid. I want to suggest to them that it's a quality issue, but the trouble is they KNOW the full history of the thing and will be pushing the PO's lack of care. (I bought it privately at a deceased sale) Yeah I know everything is against me.
Can the gears be rehardened? If they aren't worn of course
Other machines I've had haven't had this sort of problem, but I've not had them quite so well used and have always kept up with their maintenance.
So there is someone out there with a spot of knowledge they're willing to dispense
Look, I've included pictures
Thanx
David
What I got at the moment
What I might have to use
). Turns out the pinion bearings were worn and that has allowed it and the crown wheel to start wearing each other. They hadn't gone through the hardening and the shop said that new bearings would probably keep things going for awhile
but knowing my luck it'll fail at the WORST possible moment. So told them to replace the gears too, parts are NZ$3500 but will be less if they can find cogs at the wrecker.
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