PTO on D12 does not stop
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=138690
Printed Date: 16 May 2025 at 8:55pm
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Topic: PTO on D12 does not stop
Posted By: WD45
Subject: PTO on D12 does not stop
Date Posted: 23 May 2017 at 7:37am
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Our D12 has the independent pto (late model series I) Process to repair - pto does not stop.
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Fred Dunlop, G,B,CA, WC,WF, 3 WD45`s,gas, diesel and LP,U,D10 series III, D12,D14,D15 SERIES II,D17 Series IV in Gas and Diesel ,D19 GAS and D21,170 185,210 ,220 an I-600 8070 fwd, 716H and 1920H
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Replies:
Posted By: RMD
Date Posted: 23 May 2017 at 10:43am
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The PTO on those has a wet clutch that runs in oil. When there is no load on the PTO, the spinning of the oil is enough to keep the PTO shaft turning when the clutch is disengaged. It normally will stop if there is an implement attached to the shaft to provide some resistance to turning. In theory you can grab the PTO shaft with your hand to stop if from turning, but that is not recommended. I always shut the tractor off when hooking up the PTO. The Series III had a PTO brake. If the PTO keeps turning an implement with the clutch disengaged, then something is wrong and repairs are indicated.
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Posted By: Charlie175
Date Posted: 24 May 2017 at 5:46am
^^^ This is correct
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Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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Posted By: Ranse
Date Posted: 24 May 2017 at 8:19am
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Yes RMD is correct. My Father always told me this, and I wondered if he was right. It wasn't until I bought a manual for the tractor that I learned Dad was right all along. I can stop mine by hand if I'm wearing leather work gloves, but it's not advisable. Mine will however, turn some implements, and some it will not.
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