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John Deere 750B


 
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Koldsmoke
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Joined: 27 May 2019
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PostPosted: Mon May 27, 2019 12:54 pm    Post subject: John Deere 750B Reply to specific post Reply with quote

I have a 1984 John Deere 750B Dozer which won't move forward or reverse after sitting for a couple months.
When I start it after sitting for a few months the transmission pressure gauge falls into the red zone and it will not move forward or reverse. Blade functions as it should and engine starts and runs great.
However, If I remove and replace the transmission hydraulic filters with new ones, it will start right up, transmission pressure gauge will climb quickly to around 225 psi, and magically it will move forward and reverse as it should. If I use dozer frequently, all is fine, but once it sits again for a couple months, the problem starts all over again. Any advise on this subject would be greatly appreciated.
 
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jm.
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Joined: 11 Apr 2010
Posts: 5832
Location: Dover Tenn.

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PostPosted: Tue May 28, 2019 10:53 am    Post subject: Re: John Deere 750B Reply to specific post Reply with quote

Pretty common oil draining back from the pump. Next time you use it park it with the back end on a log or bank where the front is quite a bit lower, bet it will move.
 
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Koldsmoke
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PostPosted: Tue May 28, 2019 10:58 am    Post subject: Re: John Deere 750B Reply to specific post Reply with quote

Thx for the advise. I will try that. Hopefully that works, as the pair of hydraulic filters are not cheap.
 
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