Hey guys - first post here. I'm a young apple grower - have owned my orchard for 4 years after quiting my job in the auto service industry - got tired of working for the man. Have a JD 455 (2300 hours) and a 6200 (10800 hours).
I have a John Deere 455 - 2300 hours. Went to mow today and it shut off as soon as I pulled the PTO switch. Found the blown fuse, found a short in the wiring harness to the PTO solenoid. Repaired the short and installed a new fuse, runs great. Start to mow and after it warms up - 5-10 minutes, it loses power and almost stalls. Blows black smoke as it tries to catch up. Disengage the PTO and it will come back to life but then when I try to move forward, it lugs again. I've found that with PTO engaged or disengaged, it will lug and almost stall under a heavy load (My test is going up a steep hill) under full or part throttle. Then when I turn and come down the hill, it runs OK. As soon as I start to move forward it lugs.
Every winter I change engine oil, oil filter, air filters, fuel filter and grease my fittings. Every other year I change hydro oil. All with JD parts/oils. Hydro oil is clean and full right now. Fuel filter looks clean, fuel is full, air filters are clean. This happens with the PTO engaged or disengaged. Help?