i had the perfect example happen to me at the end of last week....(kinda long)
wednesday night, doing a small favor job (spread 10 tons of stone in a driveway) for a friend of mine, because i had no other time to do it and i had a 2.5 day job to be at thursday morning and a half day job somewhere else on saturday afternoon.
9pm wednesay , i was just about done, and my tractor just stopped running, smelled hot like electrical burning and would not restart. tried jumper cables, got it to crank, but no start. finally got it to run, but only for 5 minutes then it died completely. i thought maybe it was the battery was toast so i went to walmart for a new one so i was ready to go thursday AM. thursday came, stuck the battery in, no start. cranked fine, just no start. i yanked the fuel shutoff solenoid, saw it wasnt working and i have burnt fusible links, so off to the dealer i went. my local dealer did not have the link, but the other dealer 15 miles away had it. drove over, got the link, came back and installed it and it popped again. bypassed the fuse link all together and started hunting to root cause. since the fuel solenoid wasnt working, i went and got one (i cant beleive they stocked it) and threw it on. 30 seconds later it blew up!!! seriously frustrated, i went back to the dealer and ordered another, and talked to the service manager. he gave me the pages from the manual to test my fuel control module. i ordered one just incase before i left. went home, checked the module, and yep it was toast. saturday at 815 am, my parts were in. they were ordered 430pm on thursday. by 2 pm saturday afternoon, i had the parts in and she is running fine. i can now get back to work and hopefully get caught up to keep my customers happy. one customer told me if i wasnt there by this week she was going to get someone else, so i said i will be there even if i have to rent a machine.
due to a good dealer and the MASSIVE distribution of JD's parts warehouses, i was only down for 2 days. try that on a chinese machine.
and yes, it sucks that it cost me 800 in parts, but it could have cost me 3000 in lost jobs, and alot more in lost customers and bad word of mouth recommendations!
and a big thumbs up to Detlan Equipment in Silverdale PA for having experienced staff and being willing to help a brother out. lord knows how hard finding this electrical problem would have been without their help!!