zetor 6911 wont start

[zetordenmark]

hello i have at 6911
it wont start and the fuelpump pumps diesel up and all 4 "dont know what they called on english" sprays and the compression test says nothing wrong but we have a mistake about the pump maybe it is that...
dont know what to do and it is not possible to bye another pump here in denmark )-: we have also changed the fuel and we have tryed to twist the pump HELP with some ideas.......

 

[ixer0]

Hi

I had this problem on a 6911. It was the key broken off on the end of the injection pump on the drive gear. This caused the timing to be wrong.

Mike

 

[zetordenmark]

hi mike i have the pump off and strange it is nothing seems too be nothing vrong with the pump can it be inside the pump???

 

[ixer0]

Have you taken the nut off the end and removed the drive gear to check the key ?
There are 3 main things to always think about when an engine will not start :
Fuel , Compression and Timing.
As you have checked the first 2 it must be a timing problem. There is a man here in UK that will repair the pump if it is faulty but it sounds like timing to me.

Mike

 

[zetordenmark]

Hi Mike i will try to remove the gearweel if i can it sounds right

 

[zetordenmark]

hi mike nothing is vrong i have taken the gearweel off and the "not" are ok ???
is there als a "not" inside the block on the tractor???

 

[ixer0]

Hi

As the key is okay I think you need to put the pump back on the engine and check the timing is correct. I believe the timing gear is keyed to the shaft but this will be a big strip out to check. I have had the drive shaft twist when there is an inj pump or compressor problem. .
The older Zetors will not start from cold without the cold start in. Is it going in okay ?
What pressures did you get when you did the compression test ?
How fast is the starter turning the engine, as it needs to turn at a reasonable speed to build up compression ?
Would it start if you towed it ?

Good luck and keep trying

Mike

 

[zetordenmark]

Hi mike cant remember what the compressions test said but they were all 4 the same before we took the pump off we had it startet one time but we had to have full trottle on and it just idle running and i have also taken the air filter off so it is not that..

Tom..

 

[ixer0]

Hi Tom

Have you tried removing the exhaust ? We have had them block.

Mike

 

[zetordenmark]

Hi mike

we will look at the tractor next weekend so we try some things , if the wether is with us

 

[zetordenmark]

we have tryed to put a pump on from a 6718 it fits but it still wont start my question can it drive with a pump from a 6718?????????

 

[whiskey]

Hi, if we feel that we have a problem with any of our injection pumps, we see if the tractor will run on ether(easy start)but as you may well know, only give a small amount as too much will damage piston rings,etc .

 

[zetordenmark]

HI MIKE

it was the exhaust stupid me i have taken the front off the tractor incl front-axel and lookd into 4 gearwheels for timing the engine and there was nothing wrong then i took the exhaust off and it startet

 

[ixer0]

Hi Tom

Glad you got it sorted.

Mike