Question : i have a john deere 1600 18ft haybine i just had the seals in the pump done i did one round and it quite turning. like it was pluged, but it wasnt. i can hear the oil moving in the neck and can see the hose pressure up to the pump and back to the filter and no movement. could it be the reilf valve? i took the pump off and you cant turn it by hand. but i couldnt turn it by hand when i got it back so i guess you cant and it is fine cause it worked.
Answer :
If I’m not mistaken there is a snap ring in the end of the relief valve that can be removed allowing you to disassemble the valve. I have had limited success in attempting to clean the relief valves and still have them work.
I would suggest disconnecting the hydraulic motor and check to see if you can turn it by hand. In some cases debris can get stuck between the swash plate and the piston carrier allowing oil to bypass in the motor. If after cleaning the relief valve you run it and there is no change take a closer look at the motor.
Let me know what your findings are.
Thanks,
Kevin
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$18 : i have a 1600 18ft haybine i just had the seals in the pump