john deere 6930
- Thread starter Squire
- Start date
diesel power
Well-Known Member
Any kind of diesel seems to be hard on those JD tractors 
.
.
headcase
Very Senior Member
Is it definitely pressureand not a vacuum?I have a 6930 with 2600 hours on clock which has been well minded but has recently started to build up preasure in diesel tank ,doesnt seem to be blocked cap as i have switched caps from a 6910 any ideas would be helpfull
johndeere6920s
Well-Known Member
Doesn't the diaphragm go in thr injector pump on them and builds pressure in the tank
headcase
Very Senior Member
Thought the '30s were electronic and common rail
houlie87
Well-Known Member
I have a 6930 with 2600 hours on clock which has been well minded but has recently started to build up preasure in diesel tank ,doesnt seem to be blocked cap as i have switched caps from a 6910 any ideas would be helpfull
Both my old 69202 and 6930 did that, it was the filler cap every time!
johndeere6920s
Well-Known Member
Ah yeah they would be it's the 10 series I'm tinking of
AYF
Well-Known Member
Flexiblre flow return pipes going fom the top of the tank under the cab!
Happens all the time with our 6620. They look fine either end but dont be fooled! Between chafing and the diesel screwing them up they go. And the tank gets blamed for spewing diesel out on to the top making you think it isnt the pipes fault!
Take Lh corner of the floor mat up to acces top of tank and simply pull new pipe through using the old ones. Easy and fairly cheap fix hopefully!
Happens all the time with our 6620. They look fine either end but dont be fooled! Between chafing and the diesel screwing them up they go. And the tank gets blamed for spewing diesel out on to the top making you think it isnt the pipes fault!
Take Lh corner of the floor mat up to acces top of tank and simply pull new pipe through using the old ones. Easy and fairly cheap fix hopefully!
thanks for your help yes it can be slow to start in the morning and will stall within the first minute after that it is fineI have a 6930 with 2600 hours on clock which has been well minded but has recently started to build up preasure in diesel tank ,doesnt seem to be blocked cap as i have switched caps from a 6910 any ideas would be helpfull
gone
Well-Known Member
Flexible pipes.
They need changing as AYF says it is not a massive job.