ZETOR 8111 AIR-LOCKED - HELP

kincaid

Hi, this tractor has airlocked and just would like to know if someone could tell me the proper way to bleed it, much appreciated

thanks

Atilathehun

kincaid wrote: »

Hi, this tractor has airlocked and just would like to know if someone could tell me the proper way to bleed it, much appreciated

thanks

Follow the pipes from the fuel tank to injectors. Along the way, you should find a manual priming pump. May look like this one in the picture.
You have to use the handle to pump diesel from tank to engine. You will know by feel once diesel is pressurised in the line.
You nay need to use it regularly once the tractor has been parked for a day or two, to get fuel to where it's needed. Typical Zetor technology.

May also have a yellow knob on the handle.

kincaid

thanks for that, do i still need to loosen the injector nuts abit and then pump it?

Atilathehun

kincaid wrote: »

thanks for that, do i still need to loosen the injector nuts abit and then pump it?

No. Just pump. You will feel the resistance change, when you arive to the point where you have purged the air.
Anyway, I would give it about 10 shots. Try starting. If wont start give another 5 or 6 shots ant try starting. Should work.
Works best when fuel tank is fairly full.

Atilathehun

PS: There is a great site for Zetor owners called www.zetorworld.com

Go on there and you can learn a lot of stuff

kincaid

HI, I dont seem to see that pump shown on this tractor , there look to be a pump device just below the injector pump

johnpawl

kincaid wrote: »

HI, I dont seem to see that pump shown on this tractor , there look to be a pump device just below the injector pump

There's a little bolt on the top of the injector pump, towards the front. It probably also has a slot so it can be opened with a screwdriver. Loosen this a couple of turns and use the pump until the diesel is coming out. Tighten the bolt whilst the diesel is flowing. Should be primed then.
What I often do is ignore the hand pump, loosen this bolt, try starting the tractor, tighten this bolt while the diesel is being pumped and your airlock should be free.

selfdiy

I normally do the follow after it gets air locked.

1. Loosen the bleed screw on the top towards the front of the injection pump as John mentioned
2. Pump the priming pump shown in the picture above, you may have to twist the handle anti-clockwise to get it to move up and down.
3. Keep pumping until clear diesel (no bubbles) comes out of the bleed screw then tighten the bleed screw up again.
4. Loosen the supply line to one of the injectors.
5. Crank the engine over tell it starts.

Once started tighten the supply line to the injector you loosened, be sure to be careful around the high pressure diesel that may be spraying out of that supply line, if it gets under your skin, you'll have big trouble.

If it hasn't start in 30 - 40 seconds repeat the above.

kincaid

GOT HER GOING..

THANKS GUYS FOR YOUR HELP

9935452

When you bleed it there is only need to bleed it to the filters. We have had a lot of them over the years with second tanks and if left overnight with the top tank empty they would airlock.

We have never had to bleed to the injectors. dont know why but they always fired first time.