TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
Page 324 of 552
TM 9-2350-311-34-2 6-11 EQUILIBRATED ELEVATION MECHANISM ASSEMBLY - CONTINUED d. Assembly - Continued 24 25 26 27 28 29 30 31 32 33 34 35 36 37 Install new preformed packing (38) in fluid restrictor (36). Apply sealing compound to two cap screws (35). Install fluid restrictor (36) to cannon equilibrator (37) with two cap screws. Torque cap screws to 20 Ib-ft (27 N·m). Install new preformed packing (34) and new packing retainer (33) in bracket assembly (32). Install tube coupling (28) to bracket assembly (32). Install two new preformed packings (29 and 31) and new packing retainer (30) in manifold (27). Connect manifold (27) to tube coupling (28). Apply sealing compound to threads of two cap screws (26). Install manifold (27) to cannon equilibrator (37) with two cap screws. Torque cap screws to 20 Ib-ft (27 N·m). Lubricate two new seals (71 ) with hydraulic fluid. Install on elevating piston rod (8). NOTE Perform step 32 for unmodified equilibrated elevation mechanism assembly or step 33 for modified equilibrated elevation mechanism assembly. Be careful not to scratch smooth, finished, inner bore of cannon equilibrator or to damage new seals. Restrain cannon equilibrator (37) and install elevating piston rod (8) into cannon equilibrator through front end. Restrain cannon equilibrator (37). Insert rod guide tool (not shown) into equilibration end of elevating piston rod (8). Install elevating piston rod in cannon equilibrator (37) through front end. Remove rod guide tool. Lubricate new seal ring (70) with hydraulic fluid and install on piston adapter (54). NOTE Perform step 35 for unmodified equilibrated elevation mechanism assembly or step 36 for modified equilibrated elevation mechanism assembly. Install piston adapter (54) by screwing it into rear of elevating piston rod (8) by hand. Apply sealing compound to piston adapter (54) and screw it into rear of elevating piston rod (8) using span- ner attachment (not shown). Lubricate new preformed packing (68), new split ring (69), new seal ring (67), and new ring scraper (66) with hydraulic fluid. Install on cap (65). 6-62