4640 vibration update

JCRdeere · Aug 20, 2013

Replaced the balancer, the vibration is still there. Unhooked the hydraulic pump and loosened all the belts trying to remove any external vibration with no luck. Noticed that engaging pto did not change the vibration either. TimS shouldnt engaging the pto at least change the vibration? I"m not familiar at all with the permaclutch. Also, when feeling the motor, the vibration tends to be worse towards the front of the engine than the back. Now I"m worried it is something internal on the engine...

Roger in Iowa · Aug 20, 2013

Can you loosen the line to the injectors, one at a time, and see if it changes anything?

tim s · Aug 20, 2013

The PTO race will stay out in the fingers, the piston will still engage the PTO, but not fully, which you will not notice wit out a load,, and again this is not "for sure" but I have seen it several times,, I would split it and check the clutch out next...it could be other things in the clutch too..

Whichester1 · Aug 20, 2013

Look for a bent fan blade, it could be this simple.

tim s · Aug 20, 2013

Yes, I never thought about that...

DONMYEIL · Aug 21, 2013

Reaching out a little ,check the fan pulley for dirt in the back side, check fan belts for flat spot etc. (run with belts loose ) . Also could be flywheel bolts getting loose .

4640 vibration update

JCRdeere

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Roger in Iowa

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tim s

Well-known Member

Whichester1

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tim s

Well-known Member

DONMYEIL

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