John deere 6600 high idle

[Conor B]

I have a john deere 6600. In the morning when i start her up she idles at 800rpm. Then afer about 30 mins of work she will idle at 1000rpm. The cables are fully seated against the bolts for the idle but i dont see anything wrong. Any ideas?

 

[jpd]

replace fuel lift pump,filter,rubber hosing,1 way flow valve
or
just drive it

 

[Mur Huwcun]

What pump is that? It’s just the bog standard pump in 00s if I remember. Has it got some sort of cold start mechanism?

 

[jpd]

There is a submersible pump, or can be fitted on the chassis, that can fail. There is also a mesh gauze where the the diesel is drawn for the injector pump. Faulty pump or clogged gauze wi ll cause hard or impossible starting and or unsteady idling. There is also a heat assist system usually activated by pressing in the key for 30 to 40 seconds