Jd 6620

[Alecb]

Hi
My jd 6620 misfiers now and again, it'll drop 100 rpm for a fraction of a second then goes back to normal again , any ideas please

 

[Tractortech]

Now Then..
Which engine and fuel system does it have?? I presume all the filters and hoses are in good order??

 

[Alecb]

Its a Common rail, filters are good only 1 original hose which looks ok it's not leaking anyway

 

[Tractortech]

Does it have any error codes in the ECU?? How often does the problem occur?? Is the engine warm or cold at the time?? How many hours has it done??

 

[Alecb]

Does it have any error codes in the ECU?? How often does the problem occur?? Is the engine warm or cold at the time?? How many hours has it done??

I don't think there's any error codes but not to sure how to find them, it's done it for the last 2 days only done it once today and a couple of times yesterday at around about mid afternoon so when hot

 

[Tractortech]

Does the engine glow plug light flash when the engine is running??

 

[Alecb]

Does the engine glow plug light flash when the engine is running??

Tbh I thought about that but I think the bulbs gone it didn't light up when I turned ignition on

 

[Tractortech]

I'd fix it then.. There may be one in R/H display, cab suspension / HMS perhaps if you don't have those features..

 

[Alecb]

I'd fix it then.. There may be one in R/H display, cab suspension / HMS perhaps if you don't have those features..

So if it flashes what does that mean ?

 

[Tractortech]

If it flashes, there's a code. Do you have the operators manual to hand..
Turn the key on, click the roll mode switch to clear the engine preheat notice / press and hold the roll mode switch until the display reads 'Diagnostic Mode' / use the indicator switch to scroll to 'All' / click the hazard light switch / scroll to ECU / click hazard switch, and you should be able to see the codes. You scroll through them with the indicator stalk, when it gets to 'Clr', the hazard switch will clear codes.. Write them all down as you go through.. The operators manual shows all this and an explanation of the codes..

 

[Alecb]

If it flashes, there's a code. Do you have the operators manual to hand..
Turn the key on, click the roll mode switch to clear the engine preheat notice / press and hold the roll mode switch until the display reads 'Diagnostic Mode' / use the indicator switch to scroll to 'All' / click the hazard light switch / scroll to ECU / click hazard switch, and you should be able to see the codes. You scroll through them with the indicator stalk, when it gets to 'Clr', the hazard switch will clear codes.. Write them all down as you go through.. The operators manual shows all this and an explanation of the codes..

Yes thankyou found that it says crankshaft speed sensor faulty and crankshaft signal disrupted