TB-9-1000-234-13
EXERCISING OF RECOIL MECHANISMS AND EQUILIBRATORS
TECHNICAL BULLETIN
SEPTEMBER 2010
TB-9-1000-234-13 - 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.
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