1、= 9999906 2047639 83T Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3, Highway 547, Lakehurst, NJ 08733-5100, by using th
2、e Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. .- MIL-DTL-8553 7A(AS) 22 September 1997 SUPERSEDING 16 January 1983 MIL-T-8553 7(AS) DETAIL SPECIFICATION TAlLER, MUNITIONS, AERO 5 1C This specification is approved for use by the Nav
3、al Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for the procurement of an 8500 pound capacity munitions trailer designated as AERO 5 1C. 2. APPLI
4、CABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. We every effort has been made to ensure
5、 the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. AMSC NIA FSC 1740 DISTRIBUTION STATEMENT A. Approved for public release; di
6、stribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-99993Qb 2047620 55% MIL-DTL-8 5 53 7A(AS) SPECIFICATIONS DEPATMENT OF DEFENSE MIL-PRF- 10924 - Grease, Automotive and Artillery MIL-W-21157 - Weldment, Steel, Carbon and Low AUo
7、y (Yield Strength 30,000-60,000 psi) MIL-W-22248 - Weldment, Aluminum and Aluminum AUoy MIL-V-62038 - Vehicles, Wheeled; Preparation for Shipment and Storage Of STANDARDS DEPARTMENT OF DEFENSE MIL-STD-129 - Marking for Shipment and Storage MIL-STD-278 - Welding and Casting Standard MIL-STD-41 O - No
8、n-Destructive Testing Personnel Qualification and Certification (Eddy Current, Liquid Penetrant, Magnetic Particle, Radiographic, and Ultrasonic) MIL-STD-83 1 - Test Reports, Preparation Of 2.2.2 Other Government documents. drawings and publications. The foliowing other Government documents, drawing
9、s, and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. PUBLICATIONS Naval Air Systems Command (NAVAIRSY SCOM) Data List 6SE00663, Trailer Munitions (Copies of specifications, standards and draw
10、ings required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.3 Non-Government publications. The following document forms a part of this document to the extent specified herein. Unless o
11、therwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCI
12、ETY FOR TESTING AND MATERIALS (ASTM) ASTM-E 14 17 - 2 Liquid Penetrant Examination, Stan- dard Practice For OD adopted) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85 53 7A(AS) ASTM-E 1444 - Particle Examination, Magnetic OD adopted) (App
13、lication for copies should be addressed to the American Society for Testing and Materiais, 100 Barr Harbor Drive, West Conshohocken, PA 19248-2959.) AMERICAN WELDING SOCIETY (AWS) AWS D1.l - Steel-Structural Welding Code OD Adopted) (Applications for copies should be addressed to the American Weldin
14、g Society, 550 N.W. LeJeune Road, Miami, FL 33 126.) 2.4 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. Nothing in this document, however, supersedes applicable laws and reg
15、ulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified, a sample shall be subjected to first article inspection (see 4.2 and 6.3). 3.1.1 Test report. A test report, delineating the results of first article test (see 4.2), shall be in accordance with
16、 MIL-STD-83 1. 3.2 Design and construction. 3.2.1 Construction. The trailer shall be constructed in accordance with NAVAIR Data List 6SE00663 and all documents listed therein. 3.2.2 Welding. All welding shall be in accordance with MIL-W-22248, Class 3; MIL-STD-278, Class M; or MIL-W-21157, Class 5,
17、as applicable. 3.2.2.1 Weldinp inspection. During fabrication, all welding shall be inspected in accordance with ASTM-E1417 or ASTM-E1444 by personnel qualified in accordance with MIL-STD-410. 3.2.3 Lubrication. The trailer shall be lubricated with grease in accordance with MIL-PRF- 10924. 3.3 Perfo
18、rmance requirements. 3.3.1 Functioning. The trailer shall be examined for proper functioning of wheels, brake system and electrical system (see 4.5.2). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85 53 7A(AS) 3.3.2 Overload. The trailer
19、, when supported by its running gear, shall withstand a proof load of 17,000 (+loo, -0) pounds, applied through the 2 sets of chocks positioned across the open hatchway doors (see 4.5.3). 3.3.3 Brake svstem. 3.3.3.1 Parking brakes. The parking brakes shall be capable of holding the trailer, loaded w
20、ith an 8,500 (+loo, -0) pound test load, on a 10 grade in either direction (see 4.5.4.1). 3.3.3.2 Service brakes. The service brakes shall be capable of stopping the trailer, loaded with an 8,500 (+loo, -0) pound test load, within 30 feet when traveling at 20 miles per hour, on level, dry concrete (
21、see 4.5.4.2). 3.4 Towing force. The towing force required to move the trailer fiom rest on smooth, dry, level, paved surface, such as brushed concrete, shall not be greater than 50 pounds per ton of maximum gross weight, measured at the drawbar (see 4.5.5). 3.5 Mobility. The trailer shall be subject
22、ed to and pass the road test (see 4.5.6. l), the maneuverability test (see 4.5.6.2) and the side slope test (see 4.5.6.3) as specified herein. 3.6 Workmanship. Workmanship shall be in conformance to the design and performance requirements specified herein. Equipment having missing, inoperative, defe
23、ctive, bent, broken or damaged parts, shall be rejected. The installation of hardware parts, such as catches, pins, handles, nuts, bolts, shall avoid damaging the hardware or the mounting surface. Damaged hardware or mounting surfaces shall be treated to provide a continuous protective coating. Scre
24、ws, nuts, and bolts showing cross threading, mutilation or detrimental or hazardous burrs shall be rejected. Insulated wires shall be formed into cables or ducted. Wires, cables, and brake limes shall be routed and positioned in a protective manner to avoid contact with rough or irregular surfaces a
25、nd sharp edges. Ail welds shall be free of hdl defects such as cracks, porosity, undercuts, voids, and gaps. There shall be no evidence of burn through. Fillets shall be uniform and smooth. Angular or thickness misalignment, warpage, or dimensional change due to heat fi-om the welding operation shal
26、l be within permitted tolerances. There shall be no damage to adjacent parts resulting fi-om welding. 3.7 Marking. Marking for shipment shall be in accordance with MIL-STD-129. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
27、a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-U 9999906 2047623 260 = MIL-DTL-85 53 7A(AS) c. Sampling inspection (see 4.4). 4.2 First article inspection. The first artic
28、le sample shall be performed on one complete trailer when a first article sample is required (see3.1). This examination includes the tests specified in table I under First Article and in the sequence shown. 4.3 Conformance inspection. Each trailer shall be subjected to the tests specified in table I
29、 under Conformance, and in the sequence shown. 4.4 Sampling inspection. Trailer components shall be inspected using sampling plans noted on the components detail drawings or if none are specified, as directed by the procuring activity (see 6.2). 4.4.1 Rejection and retest. When a unit fails the insp
30、ections (see 4.2 and 4.3), no item still on hand or later produced shall be accepted until the extent and cause of failure is determined and resolved. 4.5 Methods of inspection. 4.5.1 Examination of product. Each trailer shall be examined visually to determine compliance with the requirements of thi
31、s specification. Each trailer shall be inspected to determine conformance to the engineering drawings. Particular attention shall be given to routing protection and functioning of the lighting circuits and brake lines. Dimensions and attributes not in compliance with drawing tolerances shall not be
32、accepted. 4.5.2 Functioning. Each trailer shall be examined to determine that wheels are correctly aligned, that all brake systems (including back-up) function and are correctly adjusted, that the electrical system is in working order, that all points requiring lubrication are properly lubricated, a
33、nd that the wheel bearings are properly adjusted and lubricated. To check alignment, the trailer shall be on a level surface with fiont wheels straight ahead. Measure the distance between the front wheels at hub height. Mark point where measurement was made. Roll trailer forward until these marks ar
34、e on the opposite side of the axle (1 SOO). Measure the distance between the wheels at hub height at this point. The difference between the two measurements is the actual toe-in, and shall not be over 0.250 inch. If toe-in is not as stated, adjust to O to 0.250 inch. For adjustment, loosen jam nuts
35、on both ends of the tie-rods and rotate tie-rods in or out as required. To adjust wheel bearings, jack or prop trailer to raise wheel off the ground. Spin the wheel and tighten adjusting nut until a heavy drag is felt. Then loosen nut until wheel rotates freely and bearing end play does not exceed 0
36、.002 to 0.003 inch. Install cotter pin through nut and axle and replace grease cap. 4.5.3 Overload test. Place a 17,000 (+loo, -0) pound test load across the open hatchway doors for not less than ten minutes. At completion of the test, there shall be no evidence of permanent distortion such as warpa
37、ge of trailer deck, damage such as dents or breakage of components parts, misalignment of wheels, or other defects detrimental to the intended use. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85 53 7A(AS) 5 6 TABLE I. First article and
38、conformance inspections. Side Slope Service Brake Sequence Examination of moduct 3.5 2 Functioning 4.5.6.3 X 3 1 TowingForce 3.3.3.2 3.5 3.3.3.1 3.3.2 4.5.4.2 X 4.5.6 X 4.5.4.1 X 4.5.3 X X I 7 Parking Brake I First Requirement Test Paragraph Article Conformance X I Ix I 3.2 3.3.1 4.5.2 X X 4.5.4 Bra
39、ke system tests. The trailer shall be loaded with an 8,500 (+loo, -0) pound test load consisting of bulk material (steel or concrete) placed across the open hatchway doors. The brake system shall then be tested as specified in 4.5.4.1 through 4.5.4.2.2. 4.5.4.1 Parking brake tests. The trailer shall
40、 be loaded with an 8,500 (+loo, -0) pound test load and placed on a 10 degree inclined ramp, facing uphill. With parking brake applied, the trailer shall not roll. The loaded trailer shall then be tested facing downhill. This test should be performed after ali mobility testing to ensure that the bra
41、kes have been burnished sufficiently to achieve a successful test. 4.5.4.2 Service brakes. The trailer shall be loaded with an 8,500 (+loo, -0) pound test load and connected to a prime mover. The trailer test brakes shall then be tested as specified in 4.5.4.2.1 and 4.5.4.2.2. 4.5.4.2.1 Brake stoppi
42、na capability test. Tow the loaded trailer at a speed of 20 mph on a level, dry concrete surface. Stop by applying brakes of towing vehicle thus actuating the trailer 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-II 9%Ob 2qb25 033 II Level Paved
43、Highway Graded Gravel Road Level Course L/ MIL-DTL-85 537A(AS) 20 - 25 mph 10 - 12.5 mph 10 - 12 mph 100 miles 50 miles 5 miles inertia brake. The trailer shall stop within 30 feet or less of the point where brakes were first applied. The trailer shall not jackknife. At the end of five test cycles,
44、inspect the service brakes and actuating mechanism. Failure to operate satisfactorily or evidence of excessive heating or distortion shall be cause for rejection. 4.5.4.2.2 Back-up test. After passing the brake stopping capability test, the trailer shall be subjected to a back-up force. The service
45、brakes shall hold momentarily, but with continued force, shall release and allow unrestricted rearward travel. The test shall be performed five times. 4.5.5 Towing force test. Place a scale between the prime mover and the towbar of the loaded trailer. The prime mover shall apply a gradual towing for
46、ce through the scale to the loaded trailer, with its brakes released and with the trailer on level concrete. The trailer shall roll before the scale registers 270 pounds. 4.5.5.1 Breakawav test. Manually tow the loaded trailer and exert a pull on the breakaway cable to actuate the brake system. The
47、wheels should lock, bringing the trailer to a halt. 4.5.6 Mobilitv tests. During the following tests, the trailer shall be closely observed for its ease of handling. Any undesirable tendency to yaw, sway, dog walk or jackknife shall be cause for rejection. 4.5.6.1 Road tests, The trailer, loaded wit
48、h an 8,500 (+loo, -0) pound test load, shall be subjected to the following road tests: I DIS TANCE I SPEED I SURFACE - 1/ On a level course containing obstructions one inch high, regularly spaced at six foot intervals and at right angles to the direction of travel of the trailer. 4.5.6.2 Maneuverabi
49、litv. Upon completion of road testing (see 4.5.6. i), the loaded trailer shall be towed over level paved highway, at speeds of eight mph through fifty right circle turns and fifty lefi circle turns, both at maximum cramping angle. It shall then perform twenty-five sudden stops at a speed of 20 mph. At the conclusion of these tests and those described in 4.5.6.1, the vehicle shall be closely examined. Any evidence of excessive wear or damage shall be ca
