MIL-T-52953C
3.9.1 Hydraulic tubing, hoses and fittings. All hydraulic tubing, hoses and fittings shall meet the requirement of the applicable SAE recommended practices paragraphs, J 514, J 516, J 517, J 518, J 524, and J 525, and shall be routed to prevent kinking, chafing, and twisting. All lines and fittings shall be tagged or identified in some way.
3.9.2 External leakage. After completing test specified in 4.3, the degree of external hydraulic system leakage shall not exceed a class 4D for dusty conditions of SAE J 1176. External hydraulic system leakage shall not exceed a class 3 for production trucks under normal conditions.
3.10 Electrical equipment.
3.10.1 Static discharge device. When type EE specified the truck shall be equipped with two replaceable electrically conductive rubber straps, mounted immediately adjacent to the wheels.
3.10.2 Safety cutout system. Provisions shall be made to disrupt power to the traction motor when the operator leaves his seat and when the operator applies the service brakes.
3.11 Electric motors. Motors shall be industrial type with a high starting torque. The insulation for motors shall be class B, F, or H as defined in NEMA standards. When other than type E truck is specified (see
6.2), one or more thermal relay switches shall be provided which shall cause disconnection of battery power to the affected circuit before the outside surface temperature of the motor(s) exceeds 347 °F. Thermal relays shall be located in critical heat areas and shall interrupt the current only to the over-heated circuit.
3.12 Uprights and carriage assembly. Uprights shall be the telescopic roller type. Main load rollers shall be the permanently lubricated for life type. The forks and fork carrier shall conform to ASME/ANSI B 56.1 and ASME/ANSI B 56.11.4. The fork carrier shall be free of obstructions to allow the forks to slide across the entire width of the carrier. A cutout shall be provided in the fork carrier so that the lower hook of the fork will fit through the slot and each fork shall be removable without removing the load backrest. Fork thickness shall not exceed 0.5 inch at the tips and the end taper shall be not less than 14 inches long. Fork size shall be as specified on the applicable specification sheet. Forks shall be adjustable to obtain the fork spacing measured from the outside of the forks as specified on the applicable specification sheet.
3.12.1 Load backrest. A metal backrest, removable without disturbing any other component, shall be provided. There shall be no protruding bolts or appendages beyond the side plane of the load backrest. In conjunction with
the fork and hanger design, it shall provide a vertical rear guard at least 48 maximum high, measured from the load carrying surface of the forks, and at least equal to the width of the carriage.
3.13 Wheels and tires. Tire type shall be as specified on the applicable specification sheet.
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