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|  MIL-T-62735
3.5.18 Trailer towing package. When specified (see 6.2), except for stake dump trucks,
the vehicle shall have a trailer towing package. The trailer towing package shall consist of a
pintle, safety chain attachment devices, a lighting receptacle and associated reinforcements and
wiring, and shall be installed on the rear of the vehicle. Vehicles of 10 900 kg (24,000 pounds)
GVW and over that are equipped with a trailer towing package shall have a trailer brake control
system conforming to 3.5.21.
3.5.18.1 Pintle. The pintle shall be of the rotating type conforming to table XVIII. The
pintle shall have reinforcements to transfer directly to the chassis frame rails a vertical tongue
load and a horizontal drawbar load not less than that specified in table XVIII. Except for truck
tractors, the rearmost portion of the pintle shall be forward, but no more than 100 mm
(four inches) forward, of the rearmost part of the vehicle. See 3.5.1.
TABLE XVIII. Pintle.
Vehicle
Pintle
Vertical
Horizontal
class
design
tongue load
tongue load
kg (pounds)
kg (pounds)
Up to 18
MS 51335-1
815 (1,800)
8150 (18,000)
19 to 40
MS 51118-1
1815 (4,000)
18 150 (40,000)
41 and up
MS 51118-1
1815 (4,000)
18 150 (40,000)
3.5.18.2 Safety chain attachment devices. There shall be two trailer safety chain
attachment devices, one adjacent to each side of the pintle. Each attachment device shall provide
an ultimate strength at least equal to that specified in table XIX. The attachment devices shall be
capable of accommodating a standard grab hook conforming to table XIX. See 3.5.1.
TABLE XIX. Pintle safety chain attachments.
Vehicle
Attachment device
Grab hook mm (inches)
class
ultimate strength
kg (pounds)
Size
Width
Thickness
Throat
Up to 24
Equal to GVW
9.5 (3/8)
56 (2-3/16)
18.7 (47/64) 12.3 (31/64)
24 and up
19 900 (24,000)
16 (5/8)
115 (4-9/16)
30
(1-3/16) 19.8 (25/32)
3.5.18.3 Lighting receptacles. The lighting receptacle, conforming to SAE J580 with its
conductors connected and color-coded as specified therein, or number coded, shall be in a readily
accessible location near the pintle. Dump truck lighting receptacle location shall be such as to
prevent damage during dumping of the truck cargo.
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