TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
Page 486 of 552
TM 9-2350-311-34-2 14-6 SAFETY RELIEF VALVE ASSEMBLY This task covers: a. Removal c. Inspection e. Installation b. Disassembly d. Assembly INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180-95-CL-A12) Bolt, machine 1/4 - 20 x 2 inch long (item 2, Appx F) Plastic bag (item 6, Appx B) Preformed packings (2) (item 68, Appx E) Personnel Required 2 Materials/Parts Equipment Condition Cloth (item 12, Appx B) Hydraulic motor with safety relief valve assembly re- Hydraulic fluid (item 22, Appx B) moved (para 9-1) Lockwire (item 35, Appx E) References Motor seal replacement parts kit (item 147, Appx E) MIL-STD-1949 a. Removal NOTE The exterior of the safety relief valve assembly and hydraulic motor must be completely clean and dry before beginning removal of the relief valve plate. Removal of the relief valve plate must be performed only in a dust-free room with a filtered air supply. Personnel should coat hands with clean hydraulic fluid when handling relief valve plate. Because of the extremely smooth finish on the inside face of the relief valve plate, removal of the relief valve plate from the hydraulic motor housing assembly is not recommended unless it is necessary to service the internal parts of the hydraulic motor. To service the safety relief valve assembly parts, leave the relief valve plate attached to the hydraulic motor housing assembly and proceed to disassembly procedures (para 14-6b.). 1 Install a 1/4 - 20 x 2 inch long machine bolt in pin and bearing (1). Pull out on screw to compress safety re- lief valve assembly (2) helical compression spring (3). 2 Remove relief valve washer (4) and lockwire (5) from safety relief valve assembly (2) and discard. 3 Remove four plain nuts (6) from four studs (7). 14-26