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Page Title:
Instruction and capacity plates |
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|  MIL-T-62491C
3.5.6 Controls. At least one throttle control, located on the left side at the rear, shall be
provided. An independent control for each hydraulic function of the wrecker shall be provided on
both the left and right sides of the wrecker as follows:
(a) An independent control for each winch (forward, reverse, free unreeling and hold) on
both sides
(b) Boom elevation, lowering and hold control on both sides
(c) Boom extension, retraction and hold control on both sides
(d) When hydraulic outriggers are furnished, an independent lower, raise and hold control for
only the left outrigger on the left side and an independent control for only the right
outrigger on the right side
(e) When rear spades are furnished, a control to simultaneously lower, raise and hold both
spades; one control on the left side and one control on the right side
(f) Except for size 5T and 7T, when a wheel-lift is furnished, controls for all wheel-lift
functions shall be on a portable remote control box with not less than 7.02 m (23 feet) of
control cable.
Throttle control head shall be corrosion-resistant twist lock, push button lock, or micro-adjustable
mechanism. Push-pull cable controls shall be recessed. When control cables are used, they shall
be stainless steel with a neoprene or equivalent outer cover. Control cables or rods shall be
routed and anchored to prevent damage and interference with operations by snow and ice. When
space is not available in the sides of the vehicle to permit recessing the throttle and winch
controls, upright type controls may be furnished at the right and left rear corners of the vehicle.
All controls shall be of the deadman type, and shall automatically return to a neutral hold position
when released.
3.5.7 Instruction and capacity plates. Operating positions of controls shall be identified on
instruction plates, or instructions shall be etched into the control knobs. Plates inscribed with the
payload capacity in the lift-tow load position shall be provided, one at both control stations. A
plate showing capacity loads for fully retracted and fully extended boom lengths, and for a fully
raised and fully lowered boom, shall be attached to the sides of the wrecker at both control
stations. All plates shall be corrosion-resistant metal or weather-resistant plastic.
* 3.5.8 Boom assembly. The boom assembly shall be a hydraulically operated telescoping type,
capable of single winch operation for size 5T and of single and twin winch operations for sizes 7T
through 45T, all with a minimum 120-degree directional boom tip sheave or roller system. Under
dynamic conditions the boom shall meet performance requirements without permanent
deformation of any component in or along the boom or its supporting structure. The boom shall
be capable of elevation to not less than 45 degrees above horizontal. The boom shall be capable
of lowering to within 9 degrees of horizontal.
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