1、- MIL-S-62LOLC 23 9999906 0493942 O W NOT MF,ASuRE(MENT SENSITIVE i I MIL-S-62101C - SUPERSEDING 3 October 1983 MI L-S-621OlB MILITARY SPECIFICATION SEMITRAILERS, IXIWBED: TILT DECK, 15 M 30 MN, 4 WHEEL, MODIFIED mRCIAL This specification is approved for use by all departments and agencies of the De
2、partment of Defense- 1. SCOPE 1.1 h- This specification covers lowbed, tilt deck, four-wheel semitrailers having rated payloads of 15 to 30 tons, this specification are commercial items which are warranted by the manufacturer as specified in procurement documents. Vehicles procured under - 1.2 Claaa
3、.finatjnn The semitrailer shall be one of the following sizes, as specified (see 6.2): Size 15 - 15 ton Size 20 - 20 ton Size 22 - 22 ton Size 25 - 25 ton Size 30 - 30 ton. 2. APPLICABLE WCUMENTS - The following specifications and * 2.1.1 Sw,cWmandstandarda standards form a part of this document to
4、the edent specified herein. Unless e. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-URD, Warren, MI 48397-5000, by using the self-addressed Standar
5、dization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A -ON- unlimited. I PSC-2330 I Approved for public release; distribution is Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-62101C
6、otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (IXJlXsS), and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL TT- W- 5 72 - Wood Preservation, Water-Repellent. MI
7、LITARY MIL-P-514 - Plates, Identification, Instruction and Marking, Blank. MIL-W-3912 - Wood Parts, Fabricated: For Transport Vehicle Bodies and Similar Applications. STANDARDS FEDERAL FED-STD-297 - Rustproofing af Commercial (Nontactical) Vehicles. MILITARY MIL-STU-SO9 MIL-STD-1223 - Slinging Eyes
8、and Attachments for Lifting and Tiedown, Military Equipment. - Nontactical Wheeled Vehicles Treatment, Painting, Ruatproofing, Identification Marking, and Data Plate Standards. MS 75021 - Connector, Receptacle, Electrical - 12 Contact, Intervehicular, 24-Volt, Waterproof. (Unless otherwise indicated
9、, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, Military specifications and Standards, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) * 2.1.2 e. The fully equipped semitrailer shall evidence no part fa
10、ilure or permanent set or interference between parts when towed at speeds as great as: 25 miles per hour (mph), with rated payload, over unimproved roads and other reasonably hard, uneven terrain; 40 mph with rated payload over highways; and 55 mph without payload over highways. - 3-3.1 Turning ab-
11、The semitrailer shall be capable of assuming a 90 degree angle to the coupled towing vehicle without cramping or damage to the semitrailer or the towing vehicle. *I . 3.3.2 Brakemzhrmance. The service brakes shall stop the semitrailer tractor combination, with the semitrailer loaded with specified p
12、ayload, within the stopping distance requirements of Federal Motor Carrier Safety Regulation 393.52. its full rated gross vehicle weight (GVW) and gross combination weight (GO?). Requirements shall be met with a truck tractor loaded to . 3.3.3 abil,uices - The semitrailer, without payload, uncoupled
13、 from the towing vehicle, resting on its landing legs, on level ground, and with the platform level, shall conform to the dimensions specified in table I. 6 a * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-b2LOLC 23 W 9999906 0493948 L = Siz
14、es 15, 20 and 22 MIL-S-62101C TABLE I. dimension and clearanca. Sizes 25 and 30 Characteristic Overall length, feet (maximum) Overall width, inches (maximum) Platform height, from the ground to top surface of tilting platform, inches (maximum) Tilting platform width, inches, plus or minus 1 inch 36
15、96 40 95 Platform tilted angle, degrees, without beavertail (see 3.5.11, (maximum) Platform tilted angle, degrees, with beavertail (see 3.5.1), (maximum) Beavertail tilted angle, degrees (see 3.5.2) (maximum) Length from rear of gooseneck to centerline of rear bogie, feet (minimum) Length of level p
16、latform from back of goose- neck to end of platform, exclusive of beavertail, feet (minimum) 38 15 15 9 9 18 18 Il 11 19 21 96 45 95 Upper fifth wheel height, from the ground to the underside of the upper fifth wheel plate, inches, plus or minus i inch Distance from vertical centerline of kingpin to
17、 front of semitrailer, inches, plus 2 minus O inches Landing wheel clearance, radius from vertical centerline of kingpin to any point 6 inches or more below upper fifth wheel plate, inches (minimum) Forward swing radius, from vertical center- line of kingpin to most distant point on semitrailer nose
18、, inches (maximum) 48 53 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-6210lC TABLE I. 3 - (continued) Characteristic Ground clearance, to bottom of platform, inches (minimum) Sizes 15, Sizes 25 20 and 22 1 and 30 1 *Ground clearance, to bott
19、om of axles and suspension, inches (minimum) 8 181 3-6 Pxin.stminalssis . Shear and moment diagrams with maximum deflection calculations for the semitrailer loaded in accordance with 3-4 shall be performed. The strength of the floor, crossmembers, and outside frame members shall not be included in c
20、alculations to compute the main frame maximum fiber stress, but the weight of the floor, crossmembers, and outside frame members imposed on the main frame shall be included in the total load imposed on the main frame. Stress analysis shall include complete analysis of the gooseneck kickup area. 3.7
21、Platform. The tilting platform shall have one piece longitudinal The tilting If wheel wells members (without splices, butt-welds, or joints) running the full length of the platform and full width crossmembers to insure stability. platform shall be straight without protrusions or cutouts. are necessa
22、ry, they shall be covered with safety tread steel plates. wheel well steel plates shall be installed and secured on the same level as the remainder of the platform. Under all operating and articulating conditions, there shall be no interference between the tires and frame The 8 4 Provided by IHSNot
23、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-6210LC 23 W 9999906 0493950 T W MI L-S-62101C members, platform or wheel well covers. ground, under all tilting conditions, there shall be no interference between the tires and frame members, platform, or wheel cove
24、rs. When a stationary area is provided ahead of the tilting platform, the stationary area shall be floored the same as the tilting platform and shall be on the same plane so as to provide a level load space. tilting platform shall be kept to a minimum. furnished, it shall be not more than 3 feet lon
25、g, measured from the rear of the gooseneck rearward- With the semitrailer on level Q The space between the stationary area and If a stationary area is * 3.7.1 Elnoring. The platform shall be floored with apitong, white or red oak, or white ash of 2-1/4 inch uniform thickness as specified in MIL-W-39
26、12. inch, The average weight of apitong used shall be not less than 50 pounds per cubic foot (pcf), with none of the individual pieces weighing less than 47 pcf, with no more than 15 percent moisture content at time of weighing. Flooring shall be laid lengthwise, as close together as practicable, at
27、tached with corrosion-resistant countersunk bolts and bridge style floor clips to eliminate drilling frame members- The top of countersunk bolt heads shall be not less than 1/8 inch and not more than 1/4 inch below the top of the wood surface- metal reinforcements. Wood surface shall be not less tha
28、n 1/4 inch higher than adjoining metal members to prevent metal-to-metal contact of the load and the semitrailer. Platform crossmembers and bracing shall be adequate to sustain the rated payload with the load distributed as specified in 3.4.1. When platform width extensions are specified (see 3.7.5)
29、 the two center boards shall be secured to permit their easy removal by one man without special tools. The tolerance on wood thickness shall be plus or minus 1/8 i Exposed ends and edges of the flooring shall be protected with . The removable boards shall be capable of being used in the . extension
30、brackets specified. * 3.7.2 Elatfnrm extenaion Either a beavertail or when specified (see 6-21, a total level platform extension shall be furnished. level platform extension shall be floored the same as the platform. beavertail is furnished, and with the platform in tilted position and the rear edge
31、 of the platform on the ground, the angle of the platform with horizontal (ground) shall conform to table I, The beavertail or When no 3.7.2.1 Peavert ail. The beavertail shall be a nominal 60 inches in length. than 18-inch centers oriented 90 degrees to the direction of the wooden flooring. on the
32、ground, the angle of the platform with horizontal (ground) and the angle of the beavertail platform with horizontal (ground) shall be as specified in table I- The beavertail shall have steel decking support members on not more When in the tilted position, with the rear edge of the beavertail * 3.7-3
33、 -. The semitrailer shall have not less than eight stake pockets, four on each side. from the front to the rear of the loading space, except when interference The stake pockets shall be equally spaced 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
34、-MIL-S-62101C 23 W 9999906 0493953 3 MI L-S-6210 1C with critical frame members occurs, square and shall be located inside the inner edge of the outer rail of the hading space. entrapment of water. The stake pockets shall be 4 inches Stake pockets shall be furnished with drains to prevent S 3.7.4 WE
35、 D ru . The semitrailer shall have fifteen lashing D rings, located as follows: four on each side of the platform; two on each side of the gooseneck, inside the outer edge; and three across the rear. Lashing D rings and their mountings shall be the heavy duty type capable of withstanding a pull of 1
36、0,000 pounds in any direction without permanent deformation, and shall not protrude beyond the outer edge of the platform when not in use. * 3.7.5 automatic regulator to control the platform tilting speed. When placed in the tilted position the platform The mechanism shall control the speed of the t
37、ilt action of 3.7-7 Tilt lock . The semitrailer shall be equipped with a manual 1oc.king device which will secure the front of the platform in the horizontal hauling position after loading. accomplished manually. An automatic locking device, in addition to the manual locking device, shall be furnish
38、ed. The safety lock release shall be 3.7.8 Ramps. Ramps shall be furnished to bridge the gap between the ground and the top of the rear edge of the platform when the platform is tilted. of the swing type that fold onto the platform. . approximately 24 inches wide, located on each side of the rear of
39、 the platform, and shall be sloped not more than 18 degrees. of nominal 2-inch hardwood reinforced with steel and provided with support devices - The ramps shall be attached at the rear of the platform and shall be The ramps shall be The ramps shall be 10 Provided by IHSNot for ResaleNo reproduction
40、 or networking permitted without license from IHS-,-,-MIL-S-b2LOLC 23 9999906 0493952 3 9 MIL-S-62 1OlC 3.8 or when specified (see 6.2), floored between and flush with the top of the frame the same as specified for the main platform. The top of the gooseneck 3-9 The axle and suspension system shall
41、be of rated capacity at least equal to the load imposed at the ground when the semitrailer is loaded with specified payload. shall consist of either walking beam or spring suspension or combination walking beam and spring suspension and shall mount four dual wheels. Clearance shall prevent interfere
42、nce between wheels and any other portion of the vehicle under the conditions specified. Difference in height, for specified sets of dual wheels, shall be measured at the center of the tread on the outer tire. Sufficient articulation shall be provided to maintain approximately equal loading on each w
43、heel under each of the following conditions: Axle and suspension system (a) (b) (c) With not more than two diagonally opposite wheels elevated 6 inches. With forward pair of dual wheels elevated 6 inches above rear pair. With rear pair of dual wheels elevated 6 inches above forward pair. 3.9.1 . The
44、 wheel bearings and axle spindles shall be oil lubricated. manufacturers recommendations, The hubs shall be fitted with seals. The hubcaps shall have a window. The hubcaps shall incorporate provisions for venting or equivalent method of withstanding internal pressure buildup without leakage. The oil
45、 viscosity shall be in accordance with the These shall be provisions for replenishing the oil supply. * 3.10 Wheels. rim. tires iire wheel and r irq. When specified (see S.Z, a spare wheel or rim, shall be furnished. those furnished on the semitrailer. The spare wheel or rim shall be the same size a
46、s * 3.10.4 -re assu . When specified (see 6.2), a spare tire assembly shall be furniahed. inflated spare tire mounted on the spare wheel or rim. be of the same manufacture, size, load range (ply rating), and tread design as the tires installed on the semitrailer. The spare tire assembly shall includ
47、e an The spare tire shall * 3.10.5 Carrier for smre tire assem . The landing gear shall have a range of adjustment sufficient to vary the height of the upper fifth wheel plate from 47 inches to not less than 53 inches from the ground for size 15, 20 and 22 trailers, and from 50 inches to not less th
48、an 56 inches from the ground for size 25 and 30 trailers. retracted shall be 10 inches. Minimiun ground clearance with landing gear t 3.13.2 Bir mwered 1 gea - When specified (see 6.2), in addition to the requirements of 3.13 and 3.13.1 (less hand crank, etc.), the landing gear shall be air powered.
49、 a control box equipped with a 12-volt direct current (dc) motor driven pump, master control valve, leveling valve, booster, main oil tank, air side oil tank, key switch and mounting hardware. The air powered landing gear system shall include * 3.14 -mr inflation of all tires; and complete lubrication with grades of lubricants recommended for the ambient air temperature at the delivery point - adjustment of electrical 3.20 Workmanshir, . Defective compon
