TB-9-1000-234-13 Exercising of M109 Recoil Mechanisms and Equilibrators Download
Page 23 of 52
TB 9-1000-234-13 2-7 (2) With the improvised bracket attached to the wrecker boom, extend boom until distance prescribed in tables 2-1 and 2-2 "Inches distance rod to be extended" column, is reached. Retract boom and allow gun to return to the in-battery position. NOTE On M551/M551A1 vehicles only, the recoil mechanism must be at precharged pressure. Hand pump (see TM 9-2350-230-10) will be used if gun-launcher fails to return to in-battery position. (3) Repeat operation a minimum of three times to ensure recoil slide area and seals are lubricated. For M551/M55A1 vehicles, repeat operation a minimum of ten times. See paragraph 1.3b for frequency of exercising recoil mechanisms. (4) Lubricate other areas according to the procedures outlined in paragraph 1.3e. f. Exercise of 152-mm Gun/Launcher Armored Reconnaissance/Airborne Assault Vehicle M551 and M551A1. When conditions (lack of space, etc.) deny conventional use of wrecker, an improvised harness may be fabricated and used as follows: NOTE Two men required. (1) Obtain chain hoist, 1/2 ton capacity or equivalent. (2) Obtain two gun shield lifting eye bolts. (3) Fabricate or locally obtain two eye bolts 5/8-inch in diameter, eye opening 2-1/2 to 3 inches, and shaft length 4 to 4-1/2 inches. Appropriate washers and nuts are also required. (4) Fabricate or locally obtain two steel rings 5/8-inch in diameter and 3-1/2 to 4 inches in circumference. (5) Fabricate gun muzzle attachment as follows: (a) Utilizing oak or similar hard wood block 12 inches long, 8 inches wide, and 4 inches thick, remove approximately 1 inch of wood from one side except for a centered disk approximately 5 inches in diameter and 1 inch high. (b) Drill holes to accommodate eye bolts (step (3) above) at each end and centered approximately 2 inches from end of block. Insert eye bolts with bolt eye on side with raised deck. (6) Insert eye bolts to gun shield.