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IH Cub Cadet Technical Forums
IH Cub Cadet Tractor Forum
Manual PTO upgrades, modifications
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<blockquote data-quote="Colton Stevens" data-source="post: 242224" data-attributes="member: 15222"><p>I have a 1966 ih cub 71. It has a 12 hp kohler from a 122. I recently got it running and operating for the first time in 30 years. I bought a 38 inch deck from a wide frame, and modified the mule drive and hangar system to work with a narrow frame. Everything is going very well. Worked out most of the kinks with the deck operation but I can't get my mind off the front PTO. When I got it, the triangle spring was broken, therefore pto was inoperable. My brother and I rebuilt the pto with a cub cadet rebuild kit. New pto clutch, triangle spring, coil springs, etc. We struggled getting it adjusted but I am confident that we have it adjusted as correctly as possible now. Our first attempt did not grab hard enough to spin the blades. I did some work to all the mule drive pulleys and spindles etc. And tightened the pto clutch a tad more. The first attempt was based on manufacturer spec with the adjustment tool, but we had to go tighter. I don't want to tighten it further for risk of breaking the triangle. It should be noted that I have the single triangle style, with bent ends. </p><p> Now, everything works and the deck cuts grass and things are looking good. However, the blades bog down very easy in medium to tall grass. The motor does not bog down any, the blades just slow down and the pto starts slipping. If I slow the tractor down for a few seconds and let it catch up, the blades speed up and continue cutting.</p><p> I know I have plenty of hp and torque to spin the blades better, but the pto cannot grab that hard. There was some resistance in the deck spindles when I bought the deck, but they have significantly gotten better with use and tinkering. Still though, the blades bog down. </p><p> I am looking for a solution that either improves the cc design, or proves my user error. I am thinking it would be nice to use the pto to spin the blades up to speed, but then have some sort of lock mechanism that totally prevents clutch slippage once fully engaged. I understand that the clutch is probably designed as an intentional failure point in case the blades lock up, and the motor keeps turning, but I dont really care to be honest. </p><p> Any suggestions? Haven't found anything online so far.</p></blockquote><p></p>
[QUOTE="Colton Stevens, post: 242224, member: 15222"] I have a 1966 ih cub 71. It has a 12 hp kohler from a 122. I recently got it running and operating for the first time in 30 years. I bought a 38 inch deck from a wide frame, and modified the mule drive and hangar system to work with a narrow frame. Everything is going very well. Worked out most of the kinks with the deck operation but I can't get my mind off the front PTO. When I got it, the triangle spring was broken, therefore pto was inoperable. My brother and I rebuilt the pto with a cub cadet rebuild kit. New pto clutch, triangle spring, coil springs, etc. We struggled getting it adjusted but I am confident that we have it adjusted as correctly as possible now. Our first attempt did not grab hard enough to spin the blades. I did some work to all the mule drive pulleys and spindles etc. And tightened the pto clutch a tad more. The first attempt was based on manufacturer spec with the adjustment tool, but we had to go tighter. I don't want to tighten it further for risk of breaking the triangle. It should be noted that I have the single triangle style, with bent ends. Now, everything works and the deck cuts grass and things are looking good. However, the blades bog down very easy in medium to tall grass. The motor does not bog down any, the blades just slow down and the pto starts slipping. If I slow the tractor down for a few seconds and let it catch up, the blades speed up and continue cutting. I know I have plenty of hp and torque to spin the blades better, but the pto cannot grab that hard. There was some resistance in the deck spindles when I bought the deck, but they have significantly gotten better with use and tinkering. Still though, the blades bog down. I am looking for a solution that either improves the cc design, or proves my user error. I am thinking it would be nice to use the pto to spin the blades up to speed, but then have some sort of lock mechanism that totally prevents clutch slippage once fully engaged. I understand that the clutch is probably designed as an intentional failure point in case the blades lock up, and the motor keeps turning, but I dont really care to be honest. Any suggestions? Haven't found anything online so far. [/QUOTE]
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IH Cub Cadet Technical Forums
IH Cub Cadet Tractor Forum
Manual PTO upgrades, modifications
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