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Ford Tractors Discussion Forum

SOS pto slippage

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10-27-2016 18:47:32

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I was using a posthole digger with my Ford 881 (select-o-speed; gas) and ended up binding the auger. It was fairly quick (maybe 3 secs), but not an abrupt lockup. When the pto stopped, the engine slowed a bit but can't say at this point to what rpm... maybe 7-800. I immediately disengaged the pto. I dug another hole since then and it worked fine, but wondering if this could be an indicator of a worn torque limiter disc? Or is this not out of the norm? I can get full pto speed on a brush hog by the time the pto handle is pulled halfway out from the dash, so seems like the adustment there would be okay. Have not had a problem before. Is there a rough check to gauge the shape of the torque limiter.... like engaging, say, 4th gear at 4-500 rpm and pushing against a tree to see if it stalls the engine or causes clutch slippage? (My brakes aren't tight enough to lock the wheels when in gear). Would that also give a clue that the hydraulic pressure is okay? I have gauges and could check pressure independently if it were thought necessary. Thanks

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10-28-2016 06:07:51

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 Re: SOS pto slippage in reply to FarmerBlair, 10-27-2016 18:47:32  
Larry, I found this post (copied in part below) that you made about 8 yrs ago. Just to be clear, what are you actually turning to tighten the conduit... the pto handle itself, or an adjustment under the topcover? Thanks.

"As to your PTO cable adjustment, I usually pull the T handle to its stop in the upper body. Then I turn it in until it pulls the conduit tight against the fitting on the transmission top cover. That should have the cable fully in sync with the engaged position for the PTO. There is no stub cable in the transmission for the PTO.

The only feathering light I know anything about is the pressure light on the dash. I think the above cable adjustment proceedure is the most effective way to adjust your PTO."

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10-28-2016 05:53:21

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 Re: SOS pto slippage in reply to FarmerBlair, 10-27-2016 18:47:32  
Thanks, I'll look for your previous post on pto cable adjustment. I perused the shop manual late last night, but it wasn't entirely clear to me. It was late tho'.

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Larry NCKS

10-28-2016 00:19:49

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 Re: SOS pto slippage in reply to FarmerBlair, 10-27-2016 18:47:32  
What Bern said! Perhaps just a PTO cable adjustment. Perhaps more involved. Search the forum. I know I've described cable adjustment previously.

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10-27-2016 20:44:56

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 Re: SOS pto slippage in reply to FarmerBlair, 10-27-2016 18:47:32  
Since your brakes don't work, checking pressures might be the safer way to test for slippage. Having said that, unless the disc has oil on it, I doubt it slipped. If everything was working normally, it should have killed the engine. I suspect that your PTO slipped.

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