How to check JD6620 counter shaft bearings? feel?

andy r · Oct 17, 2017

Thanks for the suggestions on my burnt smell. Just wondering what the recommended ways to check that bearing would be????? I suppose I
could run the machine for a while and reach up in there and feel if the block/bearing/shaft is hot. Maybe see if the shaft/pulley would
wiggle with a bar??? Any other suggestions?? If it would be the bearing(s) how long of a job is it to repair assuming the shaft/blocks are
OK? I assume there would be some time difference between the left and right side. Thanks.

tim s · Oct 17, 2017

Inspect and feel,,is a good way. Back when the 20 series combines were in the fields in full force I was taking care of several dozen of them in this area. Many times I would find chared chaff around those bearings where they had heated up and nearly caught fire and didn't,,they are in a place that is hard to keep clean,,and those bearings are Nasty to change out. We bought a 6620 Side Hill new in 1980,,ran it hard through the 80's when times were too bad to buy a new machine,, we would do a "Walk around" the machine as it was cooling down at the end of the day checking those places and others to be sure all was well.It's really not a bad idea to do to all the machines that we run,,some times you can stop a problem before it gets out of hand...

NY 986 · Oct 17, 2017

I usually during the morning while waiting on the dew use the air compressor and blow gun to blow the machine off including around the reservoirs for the hydraulics and hydrostat as the vented caps allow for condensation of oil in those areas. Yes, dust will build back up but it takes a while before big cakes of dust build up. There are times where I will blow it off more than once per day. I can't afford a different machine so I have to look out for my 6620. By the way if checking the primary countershaft yields nothing I would check the main output shaft bearing which is right under the seat. It may not smell unless a load such as the separator is applied. However, I would line up what you need for the primary countershaft and plan on doing a change during a wet spell.

tim s · Oct 17, 2017

One of the ways of keeping the chaff cleaned off used around here is a leaf blower,,walk around the machine as it's cooling off and blow the junk off before the moisture sets it up tighter..

JIM MN · Oct 17, 2017

How about using a non-contact infrared thermometer ? After running machine, take reading from major bearing you can get to. Hot bearing big problem.

K Effective · Oct 17, 2017

Bought my laser thermometer on sale at Rural King for like $15, one bearing found paid for itself. You can get one reasonable at Harbor Freight, Rural King or Amazon, i'm sure. Beats the heck out of tearing apart the wrong bearing...

How to check JD6620 counter shaft bearings? feel?

andy r

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tim s

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NY 986

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tim s

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JIM MN

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K Effective

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