thanx for all the reply's as i stated in other post bought tractor last week wouldnt start other owner thought it didnt have any compression but read on here about lever i did after 1 week get tractor started sounded good but was very hard to start so i decided to pull head and have a look and see every thing so far looks good im going to re ring it glow plugs had fuel on them my question is can the injectors be cleaned like blowing air thru them also i took head to shop it checked good 665 hours on tractor sleeves looked good should i change pistons im planning on going back with original 76mm i think what is called for it, ive never rebuilt a diesel when i mean hard to start new battery 900 cranking amps and trying i bet over 40 times trying to start it i got it started 3 times even after letting it run for 15 -20 minutes then shutting off it wouldnt crank
kubota l185 injectors
- Thread starter mississippi-magic
- Start date
If I'm understanding the situation, this points to good compression.
The injectors are checked by pulling them and observing the cone of mist. It should be symmetrical, not spraying left or right, it should be a mist, not droplets/chunky. Point each one at a sheet of paper and look for nice round, evenly wet spot.
If that cylinders are indeed that worn, going back to stock 76mm pistons would not be ideal. Go to 10 or 20 over with a re-bore and appropriate rings. Do you have a good inside micrometer to measure the bores?
You mention the glow-plugs were wet with fuel; yes they would be after a "no-start" situation. They would also be wet if the GP controller was bad, which would also give you a hard starting situation.
Just a few more things for you to look at.
I suggest that you take your injectors to a qualified fuel injector repair shop if you really want to check them. Unless you have a bunch of special tools and fixtures, this is not something that you should tackle.
When you were trying to start it did you use the glow plugs?
The older tractors are hard to start even in warm weather. I had to use glow plugs on my old B 7100 even during the summer. Kubota has come a long way with the newer tractors but it's just the nature of the beast with the old iron.
The older tractors are hard to start even in warm weather. I had to use glow plugs on my old B 7100 even during the summer. Kubota has come a long way with the newer tractors but it's just the nature of the beast with the old iron.
really thanx for all the help love the site i talked to previous owner a little today he told me the tractor was getting harder and harder to start as he used it , yes i replaced glow plugs same day i got tractor i let them warm up over one minute tractor was real close to starting after bleeding lines buying a good battery and one week of trying to start it i decided to pull the head as for gp controller going bad i dont no what that is also i cant find a place on internet that offers over size pistons and rings vic said they have parts being new to site i dont no where to look for parts here
Vic has parts for your tractor. LAST RESORT check with your local Kubota dealer! I bet he has the parts too! ( or at least can get them)
I'd be checking that those glow plugs are working though before I went any further. New ones work just like old ones if they have no current going to them!
Ed
I'd be checking that those glow plugs are working though before I went any further. New ones work just like old ones if they have no current going to them!
Ed