MIL-T-62255 Truck Tractor, Yard Type, 4 X 2, Xm878This specification covers diesel engine driven, four-wheel, two rear wheel drive truck-tractor, yard type, with a one man half cab, having a minimum gross vehicle weight rating GVWR of 43,500 pounds and a gross combination weight rating GCWR of 100,000 pounds. Vehicles under this specification shall be procured only from a manufacturer who meets the standard commercial and commercially proven component criteria. Vehicles shall be warranted by the manufacturer as specified in the procurement 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 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43

MIL-T-62255C(AT)

receptacle. The crossmember shall be inscribed for the location of the air and electrical connectors. The crossmember shall be capable of accepting the loads imposed and the mounting depicted in SAE J849. Instruction shall be provided in the manual for the vehicle. A drawbar test to verify that the crossmember shall meet or exceed a pull of 60,000 pounds shall be conducted.

3.1.1.5.1 Rear-mounted pintle assembly. When specified (see 6.2), a rear-mounted pintle assembly shall be furnished. The pintle assembly shall be of the swivel type and conform to MS51117. The assembly shall be furnished with mounting flanges and lubrication fittings. The pintle assembly shall be mounted forward, but not more than four inches forward, of the rearmost part of the vehicle. The pintle assembly shall be mounted 34 inches above ground level, plus or minus one inch, measured at the centerline of the pintle shaft, to provide a lunette height on a dolly drawbar of 32 to 36 inches above ground level. Mounting shall include reinforcements to transfer pintle loads directly to the web of the chassis frame. Pintle assembly shall be mounted so as not to damage the drawbar of the dolly and shall be capable of assuming

an angle of not less than 70 degrees with the horizontal axis of the vehicle without damage to the

vehicle. Air connectors for a dolly or full trailer brake, and the lighting receptacles conforming to SAE J560 with cover assembly, shall be mounted in a readily accessible and protected

location near the rear pintle. The two towing devices specified in 3.1.1.4.1 shall be employed for use of safety chains that are secured to the dolly or full trailer drawbar. Receptacles and air

connectors shall be located as specified in SAE J849. Pintle location shall be as specified herein.

3.1.1.1.6 Electromagnetic interference (EMI). When specified (see 6.2), electromagnetic interference suppression shall be furnished. The vehicle shall be suppressed to the level

specified in paragraph 4.1.2, Notice 4 of MIL-STD-461, Radiated Emission Requirement REO 5, at a distance of two meters referenced in Table VIII, with limits shown in Figures 13 and 18, and

Conducted Emission Requirement CEO 7, limit of Figure A-4. In addition, when arctic provisions specified in 3.1.1.10 are furnished, the operation of the installed arctic provisions

shall not cause the overall vehicle electromagnetic interference characteristics to fail to meet paragraph 4.1.2 of Notice 4 of MIL-STD-461. The vehicle air horn, turn signals and starter are

excluded.

3.1.1.6.1 Radio interference suppression. Unless otherwise specified in 3.1.1.6, the vehicle shall be suppressed to limit electromagnetic radiation in accordance with SAE J551. Suppressors used shall be in accordance with SAE J552.