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7020 Power Shift problems
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Country Strong View Drop Down
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Joined: 16 Nov 2020
Location: 38581
Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Country Strong Quote  Post ReplyReply Direct Link To This Post Topic: 7020 Power Shift problems
    Posted: 17 Nov 2020 at 6:02pm
Tractor would drive in reverse low but once u let off the clutch on 1 thru 4 it wanted to die. Read a old post on this forum where a person that goes by the handle of 'Dr. Allis' suggested to let it cool down and while not running shift several times from 1 thru 6th because the reverse plunger might be stuck. This worked. Tractor began to shift again, however there is still something wrong because I have driven this tractor for over 30 years. Please to all who have any experience with powershfift knowledge walk me through all the different mechanical steps to take to avoid splitting this ole girl. What worries me the most is I don't know of anyone in Tennessee who can work on allischalmers power shift transmissions. My first step was to change oil and filters/element

Edited by Country Strong - 17 Nov 2020 at 6:05pm
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21383 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 6:49pm
So, what I suggested worked that time?? That means there was a plunger stuck (down) in the Power Shift valve. This can be due to lack of oil and filter changes over the years. It can also be due to the plunger valve bores being rubbed on the top making them a little tight. A good cleaning of the Power Shift valve and dressing of these bores would solve that problem, along with an oil/filter change. What is it doing now ?? The same thing ??
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DougG View Drop Down
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Joined: 20 Sep 2009
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Points: 8247 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 7:26pm
Used to be guys in Southern Ill. who rebuilt those- but havent seen nothing of them in a while
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 7:57pm
B&G Equipment in Paris TN. I'm positive Tim could fix it.
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Country Strong View Drop Down
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Country Strong Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 8:24pm
Thank you so much for responding. That's what I had planned on doing this weekend 'changing oil and filters/element.' I will contact u on this forum after I accomplish this step and drive it. Q, would locking and unlocking the differential before I drive be of any help, and what about turning the pto on?
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Country Strong View Drop Down
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Country Strong Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 8:31pm
Thank you for your response. If the basics don't work I'm sure I will be in contact with you again. Thank you.
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MACK View Drop Down
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Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2020 at 8:51pm
I would not waste the price of oil and filter. Get it in a shop for a rebuild. If a plunger stuck, there is damage to a clutch pack. Foreign material is all I have ever saw cause a plunger to stick. Foreign material usually comes from something coming apart.               MACK
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Tenn allis View Drop Down
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Joined: 24 Nov 2016
Location: Tennessee
Points: 132 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tenn allis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Nov 2020 at 5:30am
Country strong I see your from van buren county. Give Tri county equipment in crossville a call. They have worked on my 8070 before and will work on any brand equipment although they are a jd dealer
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