TM 9-2510-247-13&P
HYDRAULIC SAFETY VALVE REPLACEMENT
REMOVAL, INSTALLATION
INITIAL SETUP:
Equipment Conditions
Materials/Parts
Towing device in storage configuration (WP 0002).
Sealant, (item 11, WP 0085)
Hydraulic pressure relieved (WP 0056 00-5).
Tools/Test Equipment
General Safety Instructions
Tool Kit, Mechanics General,
None
NSN 5180-00-177-7033
REMOVAL
WARNING
High pressure is present in the 250M Fifth Wheel Towing Device hydraulic
system. Do not disconnect any hydraulic system component unless
hydraulic system pressure has been relieved. Ensure each hydraulic control
lever is moved several times through all positions and hydraulic tank relief
valve is slowly loosened to relieve pressure. Failure to comply may result
in severe injury or death to personnel.
Spilled hydraulic oil is very slippery. Be careful when entering or working in
area. Wipe up any spilled oil immediately. Failure to comply may result in
severe injury or death to personnel.
CAUTION
Always clean around fittings before disconnecting or connecting hoses or
fittings. Ensure area is clean before installing hydraulic components. Failure
to comply may result in damage to equipment.
Cover, cap, or plug all openings, ports, and tube or hose ends when they are
disconnected. Failure to comply may result in damage to equipment.
Ensure you couple only fittings designed to be coupled with each other. Never
depend on trial and error. Just because two fittings will screw together is no
guarantee that the connection will not leak. See illustrations of fitting types
in this chapter. Failure to comply may result in damage to equipment.
Fittings must be installed and hand-tightened. If a fitting cannot be handtightened,
it may be cross-threaded or have damaged threads. Use wrench
only for final tightening. Failure to comply may result in damage to equipment.
0058 00-1
