4720 Air flow restriction light coming on

   / 4720 Air flow restriction light coming on #1  

orlo

Platinum Member
Joined
Nov 15, 2005
Messages
679
Location
Guildhall, VT
Tractor
JD 2305/JD 4720 cab
Hi:

My 2010 4720 Cab, maybe last summer would at high RPM turn on the 'Airflow Restriction' light (Weird light, I had to look it up). I changed my main, and pre-filter and it appeared to be ok. Just recently it started coming back on. Filters are fine (I may try changing them anyway). Has anyone had the airflow restriction sensor (I'm assuming it's a micro vacuum sensor) go bad? I'll look up the part and probably replace it if it's cheap enough, but I figured I'd ask if anyone had experienced a similar issue. FYI, I looked for any sort of restriction, and other than the rubber duck call at the front of the intake all is fine. I even put a bore scope into the intake between the filter and the turbo and all looks fine.
 
   / 4720 Air flow restriction light coming on #2  
I would probably take a look at that sensor and see if it's able to be cleaned before I replaced it. It could be similar to like a mass air flow sensor and able to be cleaned.
 

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