- Joined
- Feb 7, 2013
- Messages
- 2,496
Yesterday's project was to remove the injectors from my Iseki diesel tractor as I was having major difficulties getting it started in the morning.
It would fire and emit lots of black smoke, then white smoke. After about four tries to restart, it would finally catch on and run perfectly.
This tractor has a loader on it so no easy job to get at the top of the engine. It took most of the day with a lot more disassembly than
just unscrewing the fittings and pulling the injectors. Also my assortment of tools was somewhat limited so that wasn't much help either.
By five o'clock I removed the last injector but not without breaking off the end fuel return line.
This morning I disassembled all the injectors and cleaned them up. All looks fine but I have no pop tester to know for sure. Anyhow, it
looked to me that the last person that worked on the injectors had not tightened the injectors as they were all loose. I would expect that
they should tightened to somewhere near a hundred foot pounds. The other interesting part was that the return lines were tightened to
a hundred foot pounds! Another thing I noticed was that the return line assembly is not at all in a straight line so I have that situation
to look at when I reassemble the thing. My feeling is that the last person before me to work on the injectors was inept.
The other morning project was to machine a small steel fitting to make the return line long enough to fit properly. I used the Springfield
lathe which is set up for collets so the machining part was pretty easy. After that I had to silver solder the little fitting onto the pipe and also
silver solder the fitting to the ring that fits over the rear injector. I'm thinking I will have to go to town and get a 27mm 12 point wrench
to put the injectors in properly, maybe a 12 point socket too. I don't know but I would think that unseated injectors would cause hard starting.
Time will tell on that.
There's the little fitting machined to make it fit together in the middle.
That's the whole return line ready to be silver soldered.
This is the injectors and repaired return line ready for install.
My guess is that the "mechanic" either forgot to torque the injectors or simply thought that tightening the nuts on the top of the injectors would
be sufficient. I would be interested to hear your thoughts. Thanks for reading along.
I don't know what the specs are but the injectors are going to be torqued to 100fp and the return line at 20fp.
It would fire and emit lots of black smoke, then white smoke. After about four tries to restart, it would finally catch on and run perfectly.
This tractor has a loader on it so no easy job to get at the top of the engine. It took most of the day with a lot more disassembly than
just unscrewing the fittings and pulling the injectors. Also my assortment of tools was somewhat limited so that wasn't much help either.
By five o'clock I removed the last injector but not without breaking off the end fuel return line.
This morning I disassembled all the injectors and cleaned them up. All looks fine but I have no pop tester to know for sure. Anyhow, it
looked to me that the last person that worked on the injectors had not tightened the injectors as they were all loose. I would expect that
they should tightened to somewhere near a hundred foot pounds. The other interesting part was that the return lines were tightened to
a hundred foot pounds! Another thing I noticed was that the return line assembly is not at all in a straight line so I have that situation
to look at when I reassemble the thing. My feeling is that the last person before me to work on the injectors was inept.
The other morning project was to machine a small steel fitting to make the return line long enough to fit properly. I used the Springfield
lathe which is set up for collets so the machining part was pretty easy. After that I had to silver solder the little fitting onto the pipe and also
silver solder the fitting to the ring that fits over the rear injector. I'm thinking I will have to go to town and get a 27mm 12 point wrench
to put the injectors in properly, maybe a 12 point socket too. I don't know but I would think that unseated injectors would cause hard starting.
Time will tell on that.
There's the little fitting machined to make it fit together in the middle.
That's the whole return line ready to be silver soldered.
This is the injectors and repaired return line ready for install.
My guess is that the "mechanic" either forgot to torque the injectors or simply thought that tightening the nuts on the top of the injectors would
be sufficient. I would be interested to hear your thoughts. Thanks for reading along.
I don't know what the specs are but the injectors are going to be torqued to 100fp and the return line at 20fp.
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