TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 221 of 343
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
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