Iron.Horse
New member
- 19
- 24
- 3
- Location
- Frederick, Maryland
Good Evening Guys,
I have a multi part question... I am working on a 803a that requires some attention and may be a lost cause. The previous owner had it running (maybe a couple years ago) and reported that the motor ran great, unit produced power, etc. and after "6 minutes it started making a terrible noise". He apparently shut it down and believed that it had a spun bearing due to water being in the oil, and then took some parts off of it for other units. Fast forward to this week, I aquired it along with some other MEP 803s and started going over it. I put a socket and rachet on the crank and found the motor locked up solid, and no surprise, a injection pump and injector missing. Well at least I know how some of the water got in it... I put PB blaster in the cylinder and let it sit overnight and worked the motor over both directions for quite a while until I got it freed up all the way and put plenty of revolutions by hand. I drained the awful "oil" which was a LOT of water, and proceeded to put some 10-30 rotella, sea foam, and ATF in the crank case. I then threw some batteries in it, and attempted to dead crank (with the injector out of course). No power there. I did some digging, and found lots of things tampered with and missing, including the bottom 2 resistors, CR-1 and V5. I jumped CR-1 (sorry) and that gave me power at S-1 and actuated the fuel pump. I didn't think V5 has anything to do with starting, although I am honestly not exactly sure what it does... I traced voltage and ended up at K2 with 25v on the receiving side but nothing on the other terminal when the key switch was engaged to start, although it does click. I jumped the terminals with a piece of wire and the motor cranks over and sounds perfectly normal (so far with a few revolutions). I assume this is a bad K2? I had the exact same issue on another unit from this gentleman and replacing the k2 with a spare, and that fixed the starting issue with that one. I pulled the top off of the "old" one and the contacts looked clean, I assume there is no way to rebuild the bottom "relay" side? Does anyone have a source for a replacement new or used k2? I did look at the great big auction site and didn't see any. I may be doing all this work for nothing, as the motor could be bad, but my curiosity is getting the best of me and I need to hear this "terrible noise" for myself before I assume the worst. Thanks as always for your insight and wisdom, this fourm is amazing!
I have a multi part question... I am working on a 803a that requires some attention and may be a lost cause. The previous owner had it running (maybe a couple years ago) and reported that the motor ran great, unit produced power, etc. and after "6 minutes it started making a terrible noise". He apparently shut it down and believed that it had a spun bearing due to water being in the oil, and then took some parts off of it for other units. Fast forward to this week, I aquired it along with some other MEP 803s and started going over it. I put a socket and rachet on the crank and found the motor locked up solid, and no surprise, a injection pump and injector missing. Well at least I know how some of the water got in it... I put PB blaster in the cylinder and let it sit overnight and worked the motor over both directions for quite a while until I got it freed up all the way and put plenty of revolutions by hand. I drained the awful "oil" which was a LOT of water, and proceeded to put some 10-30 rotella, sea foam, and ATF in the crank case. I then threw some batteries in it, and attempted to dead crank (with the injector out of course). No power there. I did some digging, and found lots of things tampered with and missing, including the bottom 2 resistors, CR-1 and V5. I jumped CR-1 (sorry) and that gave me power at S-1 and actuated the fuel pump. I didn't think V5 has anything to do with starting, although I am honestly not exactly sure what it does... I traced voltage and ended up at K2 with 25v on the receiving side but nothing on the other terminal when the key switch was engaged to start, although it does click. I jumped the terminals with a piece of wire and the motor cranks over and sounds perfectly normal (so far with a few revolutions). I assume this is a bad K2? I had the exact same issue on another unit from this gentleman and replacing the k2 with a spare, and that fixed the starting issue with that one. I pulled the top off of the "old" one and the contacts looked clean, I assume there is no way to rebuild the bottom "relay" side? Does anyone have a source for a replacement new or used k2? I did look at the great big auction site and didn't see any. I may be doing all this work for nothing, as the motor could be bad, but my curiosity is getting the best of me and I need to hear this "terrible noise" for myself before I assume the worst. Thanks as always for your insight and wisdom, this fourm is amazing!
