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Case Tractors Discussion Forum

Case 770

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Author  [Modern View]

03-29-2020 16:53:44

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Have a 770 diesel power shift in the shop right now. Was thinking it needs a torque limiter as there is no surge when you push the clutch, it will go into any gear without grinding and doesnít move, no hydraulics/steering, but the pto is spinning which to me seems strange. The service book states if there are no hydraulics itís the torque limiter. Just wondering why the pto would still be moving? Likely the hydraulic pump is the issue not the torque limiter? Thanks.

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Don Rudolph

03-30-2020 09:40:10

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 Re: Case 770 in reply to russ970ont, 03-29-2020 16:53:44  
Thanks for showing the cause of the problem. Always helpful to other people to learn. Don

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03-30-2020 07:39:36

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 Re: Case 770 in reply to russ970ont, 03-29-2020 16:53:44  
I do not have any 70 series. So this is just useful(maybe) knowledge for me. Thank you for posting. As DKase said you figured it out and showed the world. thanks gobble

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03-29-2020 18:21:09

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 Re: Case 770 in reply to russ970ont, 03-29-2020 16:53:44  
Determined that the spline and coupler to the hydraulic pump were stripped out.

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03-30-2020 06:24:23

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 Re: Case 770 in reply to russ970ont, 03-29-2020 18:21:09  
Good man to find that! Some inexperienced guys go on a long expensive goose chase to get to the same place.

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