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What’s in the shop
John Deere 400 Mixer
This mixer had a bad
upper gear box bearing. As you can see the bearing is missing some of
the balls. The main shaft of this gear box has splines that go inside the auger
from the bottom. In this case the splined shaft and auger were bonded
together as one. Nothing we could do, short of cutting the auger
would separate these two units. So,
we had to lower the auger so we could get to the upper bolts of the gear
box and disassemble it. Leaving the main gear box shaft in the auger.
It worked. Then the unit was disassembled and new bearings and
seals were installed. I'm not sure why but all three gears were in
great shape. The gearbox had no oil in it whatsoever. More
like mud in the bottom of the gear box.
When we replaced one
of the drive hubs from John Deere, it came as a 3 bolt hub not a 4 bolt as
was the one on the unit. The other
matching hub was also a 4 bolt. So
what you may say. The bolt pattern
does not match up for a 3 bolt versus a 4 bolt so we had to drill the 4
bolt hub (2 holes) to match the new 3 bolt hub. In the parts book it even shows one hub
as a 3 bolt and the matching hub as a 4 bolt. Why John Deere did this is anyone’s
guess. If you ever have to drill the
hub out to match the other, you should be aware that the aluminum sheer
pins are either a metric or machine size.
We ended up using bailer sheer bolts and nuts instead of the clips
and pins.
The customer has the unit back on the farm and back to work.
Thank you for visiting.
Sincerely
Bob Baumgras
bobscorner@owossotractorparts.com
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Missing ball
bearings
Lack of lubrication
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