dfriesen
New member
This is my first attempt after finding this forum from a Google search. I have been having problems with my tractor and trying to learn. I purchase a new 790 for several chores around the shop, Transmission Repair shop that is. I have only 1 acre to mow with rotary cutter, snow to remove with FEL and dead cars and trucks to move that have clutch and transmission failures. The problem is that this tractor runs rough, soots up the exhaust and requires 2-3 minute of idle time (1200 rpm+/-) to warm up and run on 3 cylinders. Dealer has had it in several times in the first 30 hours. I change oil every 20 hours due to the constant start up/shut off cycle here at the shop. I have continued to use JD break-in oil per dealer recommendations.
At 85 hours, the dealer asked if I would pay for the hours on the meter and take a brand new tractor - since they have found no solutions for the engine running so rough - related to the poor burning of the fuel. I agreed, and asked the dealer to do a 10 hour break-in on a dyno - because there is no way for me to put this new tractor under load, pushing in a few cars and trucks every day. The dealer had assumed that our start-up/shut-down cycle was the cause of the problem.
Now, new tractor with only 15 hours on the dial is running the same way. Now they say it must be my fuel. I have been doing this for nearly 30 years and have had 8n's, Gravely's, PowerKings, and for several years a JD 770 - the only other diesel. I have never heard of blaming the running issues on the way it is used. I did not have this problem with the 770 and my friendly competitor has had several similar small diesels including Kubotas, Yanmars and a Massey 1240, with no problems.
Any ideas??
At 85 hours, the dealer asked if I would pay for the hours on the meter and take a brand new tractor - since they have found no solutions for the engine running so rough - related to the poor burning of the fuel. I agreed, and asked the dealer to do a 10 hour break-in on a dyno - because there is no way for me to put this new tractor under load, pushing in a few cars and trucks every day. The dealer had assumed that our start-up/shut-down cycle was the cause of the problem.
Now, new tractor with only 15 hours on the dial is running the same way. Now they say it must be my fuel. I have been doing this for nearly 30 years and have had 8n's, Gravely's, PowerKings, and for several years a JD 770 - the only other diesel. I have never heard of blaming the running issues on the way it is used. I did not have this problem with the 770 and my friendly competitor has had several similar small diesels including Kubotas, Yanmars and a Massey 1240, with no problems.
Any ideas??