TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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TM 9-2350-358-BD 11-4. GENERAL - CONTINUED WARNING • Hydraulic system pressure is 1925 + 50 psi. Do not torque hydraulic fittings or perform removal procedures when hydraulic system is pressurized. Discharging system pressure before performing any maintenance procedures will avoid serious injury to personnel. • Eye protection will be worn when performing maintenance procedures on all hydraulic components to avoid injury to personnel. CAUTION • All hydraulic lines and ports must be capped to prevent contaminants from entering the hydraulic system and causing internal damage to hydraulic components. • All serviceable components must be placed in plastic bags to prevent contamination of hydraulic system during installation. NOTE • All hydraulic lines and components must be tagged before removal for identification during installation. • System specific TMs must be checked before any isolation is performed. SECTION III. FLUIDS AND SEALS 11-5. GENERAL Hydraulic circuits use fluids under pressure to activate, regulate or drive mechanisms in the vehicle. To contain the pressure within the hydraulic system all moving parts are sealed with gaskets or packing. Leakage at any of these, or at hydraulic devices or the lines that connect them will render the entire system as useless until the leak has been stopped. 11-6. HYDRAULIC FLUID SUBSTITUTIONS General Information: If the original intended fluid is lost and standard replacement is not available, a substitute fluid must be used. Refer to Appendix D for a compatible fluid. If a compatible fluid is not available, any liquid can be utilized. 11-3