|
A parts book plus the factory shop manual are the best sources for those details. There are several ways to accomplish those tasks. In the vintage N series Ford, the PTO shaft was an extension coupled to the second shaft of the transmission with the hydraulic pump mounted on that shaft so the pump ran only if the second shaft of the transmission was turning and the PTO coupling was enabled. This also meant that if there was a high inertia load on the PTO that pushing the clutch pedal wasn't sufficient to stop the tractor, hence the need for an overrunning clutch. Since those tractors, transmissions and PTO drives have become more complex and versatile. In some MF tractors, there are two clutch plates, one for the transmission, one for the PTO actuated in sequence by the clutch pedal. In others the PTO clutch pedal has a separate control. Generally the modern tractor has the PTO gearing independent of the propulsion transmission, but located in the same gear box. Some MF use a hydraulic clutch for the PTO. Some drive the hydraulic pump from the PTO shaft in front of the PTO shifter or hydraulicc clutch, some drive the hydraulic pump from the engine and don't have it in the transmission. My JD 4020 has a feeder pump in the transmission with the high pressure pump up front. I don't know what IH does, some of their tractors have two PTO shafts, one at each speed out the rear. So the quick answer is, it depends. Gerald J.
| 
