TM 10-3930-669-20 2-18.  HYDRAULIC SYSTEM TROUBLESHOOTING (CONT). 3.  PIVOT CYLINDER DOES NOT OPERATE OR OPERATES SLOWLY. INITIAL SETUP Tools and Special Tools References Tool Kit, General Mechanic's: Automotive TM 10-3930-669-10 (Item 1, Appendix B) Pressure Test Kit (Item 2, Appendix B) STE/ICE-R (Optional) (Item 14, Appendix B) Equipment Condition Engine OFF (TM 10-3930-669-10) Personnel Required MAIN POWER switch OFF (TM 10-3930-669-10) Two Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Materials/Parts Cap and plug Set (Item 5, Appendix C) Tags, Identification (Item 21, Appendix C) KNOWN INFO Lift, shift, and tilt cylinders operate. POSSIBLE PROBLEMS Pivot cylinder pins damaged or missing. Hydraulic hoses to pivot cylinder loose or damaged. Pivot control cable damaged or unadjusted. Stack valve faulty. Pivot cylinder faulty. Pivot shaft bearings faulty. TEST OPTIONS Visual inspection. REASON FOR QUESTION If pivot cylinder pin(s) is damaged or missing, the mast will not pivot. 2-436

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