The 72 series uses a spirol pin to retain the coupler, the Cyclops use a bolt in the center of the shaft. For the Cyclops just find a used pump and use the input shaft in your pump. On the 72 series I would do the same thing and get rid of the spirol pin. Remember that the Supers have a different output shaft from the GT's.
Super reduction gearing 6.8 : 1
Reduction gear 68 Teeth
Pump Shaft 10 Teeth
GT reduction gearing 5.5 : 1
Reduction gear 66 Teeth
Pump Shaft 12 Teeth
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
JD317 dump truck
BX2670 with FEL
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