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SVcummins
Tractor Guru


Joined: 06 Feb 2017
Posts: 27331


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PostPosted: Fri Jan 14, 2022 3:03 pm    Post subject: 7520 Reply to specific post Reply with quote
Could a 7520 have differential lock ?
 
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fdt860
Tractor Expert


Joined: 03 Jun 2008
Posts: 1950
Location: Kansas

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PostPosted: Fri Jan 14, 2022 6:33 pm    Post subject: Re: 7520 Reply to specific post Reply with quote
CVPost-SVcummins wrote:
(quoted from post at 16:03:53 01/14/22) Could a 7520 have differential lock ?


Not from factory.
A 4620-40 rear diff. can be fitted on the front.

On a 4wd, When pulling hard and operator is moving quickly the steering wheel back and forth to go out of some ruts or mud holes, the differential sun gears are moving very quickly back and forth without the diff lock, thus destroying them.

John Deere had an anti friction kit released for the 7520. It adressed the weak differential issue. 2wd also had the kits. If tractors were operated with diff lock on, less issues would have occured.
 
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