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|  MIL-T-52698A
disconnection of the electrical circuit from the traction motor when the
brakes are applied. The brakes shall automatically be applied when the
steering handle is within 10 degrees of the true vertical and horizontal
positions. Brakes shall be adjustable to compensate for wear and shall be
capable of retaining the truck with rated load on a 5 percent grade. When the
high drive control is specified, the service brakes shall be operated by a
hand control or a foot control located on the high drive platform.
Application of the brakes shall cause disconnection of power to the drive
motor. The brakes shall be applied when the operator removes his hand or foot
from the controls as applicable.
3.8.6 Truck housing. All functioning components, except steering handle,
wheels, battery, and forks shall be enclosed in a housing. The housing shall
permit access for inspection, servicing, and maintenance purposes. The height
and width of the housing shall be such as to provide unobstructed view of fork
tips then the operator is in the operating position.
3.9 Controls. Electric controls shall be heavy duty type. All controls
shall be provided with position markings (decals are not acceptable) at the
control(s).
3.9.1 Directional speed controls . Directional and speed controls
(rotating handles, buttons, levers, or switches) shall be mounted on the
steering handle and shall be located for right or left hand operation. Means
shall be provided to prevent simultaneous actuation of forward and reverse
controls. Controls shall be arranged so that forward movement will cause
forward motion of truck and rearward movement will cause rearward motion.
Trigger speed controls are not acceptable. If buttons or switches are used,
the one located nearest the operator shall, when actuated, cause forward
motion of the truck. The controls shall be so constructed that they return to
neutral position when released.
3.9.2 Lift and lowering controls . The lifting and lowering control(s)
shall be lever actuated type and shall be located for operation by either
hand. The lift control shall be so arranged that the forks will remain at any
position reached when the control is released. Deactivated controls shall
return to the neutral position.
3.9.3 High drive control . When specified, a removable high drive control
shall be provided to enable the operator to simultaneously raise or lower the
forks and drive forward or reverse in all speeds while standing on the
platform of the truck. Steering shall be by means of a vertically mounted
steering wheel not to exceed 15 inches in diameter. Speed of the truck shall
be limited to low speed with mast raised above 36 inches. The high drive
platform shall be 20 inches long and 30 inches wide and shall be provided with
safety chains or bars on both sides.
3.9.4 Straddle legs. Straddle legs shall be of sufficient length and
width to handle pallets of the size specified.
3.9.5 Hourmeter. An electrically operated hourmeter, which registers the
total number of hours of operation of the traction and pump motors shall be
provided.
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