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L555 1987 will lift only 1200 lbs now and the tilting function…

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l555 1987 will lift only...
l555 1987 will lift only 1200 lbs now and the tilting function is also weak but everything else seems normal whats wrong?
Submitted: 3 years ago.Category: Construction and Road Equipment
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Answered in 29 minutes by:
6/27/2015
Mechanic: Dan, Technician replied 3 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,900
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified
Hi my name is***** will be glad to help. The most likely cause is either a faulty relief valve or a weak pump. Check the relief valve cartridges in the main control valve for damaged o rings or debris causing them to stick open. If ok check the hydraulic filter for signs of fine metal indicating a pump or component problem occurring. Also, Check the suction strainer to be sure it is not plugged with trash/debris starving the pump for oil. Let me know
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Dan
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Dan, Technician
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Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.

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