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rpm check
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john2189 View Drop Down
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Joined: 11 Sep 2009
Location: Minerva,Ohio
Points: 304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote john2189 Quote  Post ReplyReply Direct Link To This Post Topic: rpm check
    Posted: 20 May 2010 at 1:04pm
HI if the pto shaft on a b is 540 rpms, does that mean that the motor is set at the proper rpms ? i think 1800 rpm.
 
John 
'41 Allis B
'45 Allis B
'49 Farmall Cub
'72 IH Cub
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Hartland Farm View Drop Down
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Joined: 13 Sep 2009
Location: Tennessee
Points: 86 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hartland Farm Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2010 at 1:11pm

A Allis Chalmers B with the BE engine is goverened at 1400 RPM. With the CE engine it is 1500.
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22823 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2010 at 1:17pm
No, I believe the CA with the CE engine was rated at 1650 RPM.  540 Pto speed would be in there somewhere but full throttle might not necessarily give you 540 pto rpm's.
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ALinIL View Drop Down
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Joined: 20 Sep 2009
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Points: 316 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ALinIL Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2010 at 3:15pm
John - I believe the PTO is 600RPM at the rated 1500RPM rated engine. - AL
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ALinIL View Drop Down
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Joined: 20 Sep 2009
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Bump  -  560RPM at 1400RPM.  -  AL
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DrAllis View Drop Down
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Points: 20942 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2010 at 9:33pm
If a "B" and a "C" are at 1400 engine RPM the PTO speed is 560........high idle(no load) of 1700 rpm would be 680 RPM at the PTO (if high idle is 1800 RPM, the PTO would be 720 RPM). The "CA" is 538 PTO RPM with the engine at 1650 RPM and that would yield 652 RPM at 2000 RPM (no load) engine speed.
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