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|  MIL-H-45984B
3.3.1.2.3 With the trails in the closed position, the
traversing mechanism shall be capable of traversing the top
carriage 360 degrees in either direction.
3.3.1.3 Speed shift assembly. With the howitzer placed in
firing position with trails in open position, the speed shift
assembly shall be capable of raising the howitzer to permit
manual rotation of the carriage 360 degrees. The maximum force
required on the hydraulic pump handle to actuate the speed shift
shall not exceed 12 pounds. The speed shift assembly shall be
capable of maintaining a controlled rate of descent to the
firing base of not less than 5 seconds and not more than 20
seconds during gravity drop. Sampling and testing shall be in
accordance with paragraphs 4.5.3.7 and 4.5.7.3, respectively.
3.3.1.4 Variable recoil mechanism. The variable recoil
mechanism shall be assembled and adjusted in accordance with
Drawing K12007600 and K1200BOO0. When elevating or depressing
the cannon, the mechanism shall move freely without binding or
looseness. Adjustment of the linkage shall be as fooows:
3.3.1.4.l. Short recoil. The 55 degree (from vertical)
mark on end of recuperator cylinder shall lie within the notch
on end of regulator lever when the cannon is at 1025 mils
elevation or more.
3.3.1.4.2 Long recoil. The 05 degrees (from vertical)
mark on end of recupoerator cylinder shall lie within the notch
on end of regulator lever when the cannon is at minus 50 mils
elevation or less
3.7.1.5 Wheel actuator. The hydraulic wheel actuator shall
be capable of lowering the carriage to the firing position and
raising the carriage to the travel position. The maximum force
required on the hydraulic pump handle to raise and lower the
carriage shall not exceed 32 Pounds. During gravity drop of the
carriage, a controlled rate of descent to the firing base shall
not be less than 5 seconds nor qreater than 20 seconds
3.3.1.6 Locking devices. All locking and fastening devices
for securing component parts shall be positive in action.
3.3.1.7 Handbrakes. The handbrakes, when engaged, shall
prevent wheel rotation while the howitzer is in an ascending or
descending travel position on a 10 degree slope having a surface
on which the tires shall not slip. Travel position shall be
defined as with the trails locked in closed position and the
lunette raised 30 inches above ground level. When the handbrake
is disengaged, the wheel-s shall turn freely with minimum drag.
5
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