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Slow In Close Direction
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Pilot controller.
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See your authorized dealer.
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Tree size too large.
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See specifications.
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Cylinder leakage.
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See your authorized dealer.
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Worn hydraulic pump.
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See your authorized dealer.
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Slow In Open Direction
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Control valve section.
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See your authorized dealer.
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Pilot controller.
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See your authorized dealer.
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Circuit relief valve.
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See your authorized dealer.
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Worn hydraulic pump.
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See your authorized dealer.
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Will Not Operate In Either Direction
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Worn hydraulic pump.
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See your authorized dealer.
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Pilot control circuit.
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Check controller and lines.
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Valve section.
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Check spool and end caps for interference.
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Will Not Operate In One Direction
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Valve section.
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Check return spring plug.
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Circuit relief.
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See your authorized dealer.
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Lacks Power
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Circuit relief valves.
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See your authorized dealer.
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Hydraulic pump.
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See your authorized dealer.
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Left Blade Retracts Before Right Blade And Grapple
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Sequence valve.
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See your authorized dealer.
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Grapple Arms Drift Closed (Valve In Neutral)
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Right shear blade not completely opened.
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Completely open right shear blade while traveling to next tree.
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Cylinder leakage.
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See your authorized dealer.
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Pilot control circuit.
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See your authorized dealer.
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Valve leakage.
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See your authorized dealer.
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Hydraulic line leakage.
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Repair or replace.
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