Posted by 1970-1655 on July 03, 2023 at 16:04:32 from (107.77.207.84):
I have a John Deere 997 zero turn with Yanmar diesel in the shop. It would run perfect for about 20 - 30 minutes, then shut off. You turn off the key, switch off the deck, home the speed control levers and park brake. Then crank it maybe 15 - 20 seconds and it would start, but each time it would shut off after shorter use times. Searched the 997 shop service manual and the net, but all I can find is the fuel shut off solenoid is defective, so I ordered one. Had a young helper wanting to work on it because it looks simple to change the solenoid. He pulled the top screw / bolt on the solenoid. Then he took out the other, but the solenoid would not move. I looked at it and he took out another bolt or pump adjuster of some kind right next to the top solenoid mount ear. It is a stud with a long nut and a lock nut. Pump shop manual calls it Maximum Speed Limit Bolt. We put the new solenoid on and it cranks great, but no start. Put the old solenoid back on and no start.
What does this stud with the lock nut do? And is it adjusted on a pump stand? Did something drop out of location? Do we need to bleed the system because the solenoid was changed? O ring is on the solenoid body. Pump is a Yanmar Mono-Plunger. Engine is a Yanmar 3TNV82A.
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