Changing PTO on 615 and creeper drive?

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My 615, with the shuttle clutch, came with a 1000 RPM splined PTO shaft.  I installed a 540 splined PTO shaft out of a D15 SII.  I thought that I would have to change a few gears to achieve the desired PTO speed, but cannot find any gear differences in the parts book except for the two gears that either allow for a power director or shuttle clutch.  Is there any differences in gears for running a 540 RPM splined PTO shaft instead of the 1000?  Or,  Is it simply a matter of varying the engine speed to achieve the 540 PTO speed? I've read that the shuttle clutch creates and oddball PTO speed.
I did found this quote posted by another member taken from a D15 Industrial sales literature, "Power Take-Off: 548 rpm at 1650 engine rpm (1000 rpm at 1880 engine rpm in combination with SHUTTLE clutch)."  This makes me think that perhaps engine speed is used to achieve the desired PRM speed. 

Lastly, there are three PTO shafts listed; a 540, 1000 and thirdly one that is "Used w/winch drive or creeper dr."  It also list a coupling to be used with creaper drive.  What is this creeper drive, how did it work and what did it do?

Edited by Dean (West MI) - 02 Jul 2014 at 8:20am

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Dean (West MI) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: West Michigan Points: 1282	Post Options Post Reply Quote Dean (West MI) Report Post Thanks(0) Quote Reply Topic: Changing PTO on 615 and creeper drive? Posted: 01 Jul 2014 at 9:56am
	My 615, with the shuttle clutch, came with a 1000 RPM splined PTO shaft. I installed a 540 splined PTO shaft out of a D15 SII. I thought that I would have to change a few gears to achieve the desired PTO speed, but cannot find any gear differences in the parts book except for the two gears that either allow for a power director or shuttle clutch. Is there any differences in gears for running a 540 RPM splined PTO shaft instead of the 1000? Or, Is it simply a matter of varying the engine speed to achieve the 540 PTO speed? I've read that the shuttle clutch creates and oddball PTO speed. I did found this quote posted by another member taken from a D15 Industrial sales literature, "Power Take-Off: 548 rpm at 1650 engine rpm (1000 rpm at 1880 engine rpm in combination with SHUTTLE clutch)." This makes me think that perhaps engine speed is used to achieve the desired PRM speed. Lastly, there are three PTO shafts listed; a 540, 1000 and thirdly one that is "Used w/winch drive or creeper dr." It also list a coupling to be used with creaper drive. What is this creeper drive, how did it work and what did it do? Edited by Dean (West MI) - 02 Jul 2014 at 8:20am

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D10SERIESIII Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 14 Sep 2009 Location: MAINE Points: 35	Post Options Post Reply Quote D10SERIESIII Report Post Thanks(0) Quote Reply Posted: 16 Jul 2014 at 1:34pm
	Hello, Those were some good questions. The creeper drive I believe was used for mounting a concrete/rock crusher on the back of the tractor (If you google "Allis Chalmers I-600" you will see a U-tube video that will show a rock crusher on the back of I-600). The 615, I-600, D15 Series II are pretty much the same tractor. The transmission parts in 615, I-600, H4, HD4, D15 Series II, are all the same. The 615, H4 and HD4 share the same engines gas and diesel. Your 615 has a stuttle chutch opition which means the PTO speed will run between 700 RPM to 850 RPM. The shuttle clutch opition causes the PTO speed to increase above the standard 540 RPM. So in a nutshell it does not matter if you change the shaft from 540 RPM or to 1000 RPM. The speed will stay the same at roughly between 700 RPM to 850 RPM with the tractor running at 3/4 to full power. It was the design of the tractor. The only way to make the tractor run at 540 RPM is remove the stuttle clutch opition and put in the power-director opition. Making the change is somewhat intense. I have I-600 and a while back I thought about putting in the power director because I had to split the tractor to fix the shuttle clutches. I was told at the time, Allis Chalmers was trying to develop a tractor that could run a 540 RPM and 1000 RPM but they developed a tractor that really runs at 800 RPM. I got a call once from an engineer, who's now in the nursing home, who's job was developing test tractor's for Allis Chalmers. He told me there was a Allis Chalmers I-400, test tractor, that was 4 wheel drive, and had the shuttle clutch opition (same as I-600, 615), plus the hi/low range (.5 mph) was the slowest gear, a clawer gear, and was a diesel. A smaller tractor than I-600, 615 but these opitions as the time might have changed the market for Allis Chalmers. The year was 1969 an Allis Chalmers decided to go overseas to have these smaller tractors built. I asked him where do you think that I-400 might be today, he said men from the corporate office, came and took the tractor away, and he thinks the tractor went over seas in which they studied the tractor to help builted AC 5020 because some of that technogoly of the 5020 four wheel drive came from that I-400 which he help developed. More information than you wanted know but somewhat interesting I think.

Macon Rounds Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 18 Feb 2010 Location: Pittsburgh Pa Points: 2227	Post Options Post Reply Quote Macon Rounds Report Post Thanks(0) Quote Reply Posted: 17 Jul 2014 at 6:12pm
	What all has to be done to change a tractor from hi/low power director tractor to a shuttle clutch tractor ????
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DiyDave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gambrills, MD Points: 53736	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: 17 Jul 2014 at 6:24pm
	Spiit, and replace the tranny, from Hi/lo type to shuttle clutch type. The lever for shuttle is on the left, vs right side of tranny...

Calvin Schmidt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Ontario Can. Points: 4530	Post Options Post Reply Quote Calvin Schmidt Report Post Thanks(0) Quote Reply Posted: 17 Jul 2014 at 6:54pm
	I'm not a mechanic and don't have first hand experience but my mechanic has. I had a I-60 TLB from 1974-1977 with the shuttle shift. I showed my neighbour how it worked and he was so impressed, he had his D-15 II with a 415 loader converted from power director to shuttle. All that has to be done is the addition of one idler gear that reverses the rotation of low side of the clutch pack and speeds it up. It's that or the next gear that drives the PTO and is why the PTO speeds changes. The clutch packs for a power director and a shuttle are the same. Factory shuttle tractors have the left side big stick but my neighbour kept his on the right side . Factory shuttle tractors block out reverse in the transmission. That D-15 with the shuttle is still the only loader tractor on my neighbour's farm. My I-60 was traded for a 715 TLB and in '87 traded again for a 715B which I still have. My H-3 with the shuttle has standard 540 PTO but the rear PTO housing is different than the D-15/ I-60,600,615 and has extra gears to standardize the PTO speed. Edited by Calvin Schmidt - 18 Jul 2014 at 12:27pm
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Dean (West MI) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: West Michigan Points: 1282	Post Options Post Reply Quote Dean (West MI) Report Post Thanks(0) Quote Reply Posted: 20 Jul 2014 at 9:04pm
	Thanks for all of the information guy, that answers a lot of questions that I had. That is some amazing information DseriesIII. That would have been the perfect tractor for me, shuttle clutch, hi-low with a very low first gear for tilling, diesel and 4x4. I really wish they could have build this tractor and offered it at a competitive retail. I wonder if there are any pictures of this tractor?