JD 2840 Vacuum Port ???

   / JD 2840 Vacuum Port ??? #1  

wolfman96

New member
Joined
Sep 27, 2016
Messages
7
Location
AZ
Tractor
JD
Just bought the 2840 and it has a vacuum hour meter ...
Where is the port to connect located on the block ???

THANK YOU !!!
 
   / JD 2840 Vacuum Port ??? #2  
Never heard of such a thing. Have a picture or part number? Doesn't it have a proof meter (combo tach, speed and hours)?
 
   / JD 2840 Vacuum Port ??? #3  
Appears there is a part no. RE17515 called a vacuum sensor noted in jdparts for the 2840.
 
   / JD 2840 Vacuum Port ??? #4  
I believe that the 2840 had a cable driven tachometer, and was driven by the camshaft (ref p/n T20071 for a pc pic)
 
Last edited:
   / JD 2840 Vacuum Port ??? #5  
Appears there is a part no. RE17515 called a vacuum sensor noted in jdparts for the 2840.

Could be wrong... but I believe the sensor you are referring to is for the air filter.
 
   / JD 2840 Vacuum Port ???
  • Thread Starter
#6  
thanks everybody ...

the local JD dealer said that is what it is (vacuum hour gauge) ...

it does have a mech tach which is connected and it does turn from the cam but the hour gauge is not working ...

i did find the vacuum port and it is now connected but a flat tire is keeping me from driving it at the moment ...
 
   / JD 2840 Vacuum Port ???
  • Thread Starter
#7  
Never heard of such a thing. Have a picture or part number? Doesn't it have a proof meter (combo tach, speed and hours)?

yes ...
 
   / JD 2840 Vacuum Port ??? #8  
thanks everybody ...

the local JD dealer said that is what it is (vacuum hour gauge) ...

it does have a mech tach which is connected and it does turn from the cam but the hour gauge is not working ...

i did find the vacuum port and it is now connected but a flat tire is keeping me from driving it at the moment ...

oops, your first post said hour meter... and for some reason my brain turned that into tachometer.
 
   / JD 2840 Vacuum Port ???
  • Thread Starter
#9  
Well, i hooked it all back up, ran it for about 10 min and hour meter never moved ... bummer
 
   / JD 2840 Vacuum Port ??? #10  
It's an easy fix, get a simple electrical hour meter from any parts house and wire it in to the keyed side of switch or any area you like that has juice when running.
 

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