MIL-T-11663 Truck, Materials Handling, Container Hoisting, Rear Hoist, 21,000 To 32,000 Pounds Gvw, 4X2This specification covers diesel or gasoline engine driven, four-wheel, two-rear-wheel drive materials handling trucks having gross vehicle weights GVW of 21,000 to 32,000 pounds, for normal operating conditions. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28

MIL-T-11663K

(d) Movement of container from travel position to dumping contents and back to travel position shall be observed. After dumping operation, observe that the container is completely emptied when contents are dumped in a pit, or trench located not less than four feet rearward from the rear axle.

4.3.2.2 Stabilizing jacks test. To determine conformance to 3.5.1.5, the rear mounted stabilizing jacks for class C and D vehicles shall be tested. During operation of the jacks system from the cab, the jacks shall be observed for proper operation without binding or malfunction. When the jacks are completely down, verify that the red indicator light is in operation to warn the driver that the jacks are down. With the jacks in the down position, the vehicle and hoist-haul

unit shall be observed to verify that the jacks provide adequate stability with relation to the ground, while the hoist-haul unit is operating under maximum load.

4.3.2.3 Type II hoist-haul unit test. To determine conformance to 3.5.2 through 3.5.2.3, the type II hoist-haul unit (rigid fork arm high lift) shall be subjected to a performance test. The container pick up (in maximum elevated position) and dumping operations shall be performed with vehicle counterweights attached. The required time of not more than 2 minutes for the complete dumping cycle, from travel position and return to travel position, shall be verified. During the test, the following verifications and inspections shall be performed;

(a) When the carrier is in the maximum elevated position, with a fully loaded container, the approximate 13 feet height from the ground to the top of the forks shall be measured

(b) The carrier capability of tilting through an arc of approximately 30 degrees

(25 degrees forward and 5 degrees rearward of the vertical) shall be verified

(d) When the fully elevated and loaded container is in vertical position on the carrier, the vehicle and hoist-haul unit with container shall be observed to verify that the counterweights provide proper balance.

* 4.3.3 Truck body treatment and painting. The certification regarding the body cleaning, treating, prime painting and salt spray resistance testing, as required by MIL-STD-1223, shall be made to Government representatives for examination and approval.