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terex pt60 2014 model new. vibration in joystick to lower…

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terex pt60 2014 model new. vibration...
terex pt60 2014 model new.
vibration in joystick to lower bucket and to unload bucket. this only occurs after about 20 minutes of operating well after oil temp. gets to normal.Also it seems to loose it feathering ability the lowering is quite smooth before the vibration starts.As soon as the vibration starts this action is quite jerky.
Submitted: 7 years ago.Category: Construction and Road Equipment
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Answered in 1 hour by:
1/9/2015
Mechanic: Dan, Technician replied 7 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,863
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
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Dan :

Hi my name is***** will try to help. First check your hydraulic filter for signs of metal/debris that would indicate a pump or component problem occurring. If clean then check your pump suction lines for sucking in air that would casue cavitation of the pumps.

Dan :

If that checks out ok then remove and inspect the relief valve cartridges in that circuit for metal/debris and damaged o rings

Dan :

A relief that is sticking could cause a similar problem

Dan :

Finally have your pressures checked and verified to OEM specs and watch for any fluctuation of pressures when this is occuring that would help isolate this to a relief valve, control valve or possible pump problem.

Dan :

Reply back with the results and if you need further help with this

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Mechanic: Dan, Technician replied 7 years ago
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