1、MIL-T-5303LA 5Y D 9999906 qh?ir2 Y D . - MIL-T -53031A(ME) 21 Aurmst 1991 SUPERSEDING MIL-T-53031(ME) 2 December 1983 MILITARY SPECIFICATION TRANSPORTER: M945 CHASSIS, FOR RIBBON PLOATING BRIDGE This specification is approved for use within the USA Belvoir Research, Development and Engineering Cente
2、r, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 SCODQ. This specification covers modifications to the M945 5-ton truck chassis and equipment to be installed on the chassis to convert the chassis to a ribbon bridge transpo
3、rter that is capable of launching, retrieving and transporting all components of the ribbon bridge system. 2. APPLICABLE DO-TS 2.1 Gove- nt docwnentg. 2.1.1 Soecifioa tions. standards. and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent sp
4、ecified herein. Unless otherwise specified, the issues of these. documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL UU-T-81 - Tags, Shipping and Stock.
5、 PPP- P -40 - Packaging and Packing of Hand Tools. b I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Belvoir Research, Development and Engineering Center, ATTN: STRBE-TSE, Fort-Belvoir, VA
6、 22060-5606 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5420 unlimited. TRIBUTION S- A . Approved for public release: distribution is Provided by IHSNot for ResaleNo reproduction or networking permitted wi
7、thout license from IHS-,-,-MIL-T-53031A 54 9999906 U487143 b MILITARY MIL- P - 11 6 - Preservation, Methods of. MIL-B-121 - Barrier Material, Greaseproofed, Waterproofed, Flexible. MIL-S-196 MIL-T-704 MIL-L-2104 MIL-W-5044 MIL-E-10062 MIL-L-21260 MIL-T-22085 DOD-C-24667 MIL-A-46153 MIL-C-46168 MIL-C
8、-53039 MIL-V-62038 - Support Items, Accessories, and Kits, Mechanical: - Treatment and Painting of Materiel. - Lubricating Oil, Internal Combustion Engine, Tactical Service. - Walkway Compound, Nonslip and Walkway Matting, Nons 1 ip . - Engines; Preparation for Shipment and Storage of. - Lubricating
9、 Oil, Internal Combustion Engine, Preservative and Break-In. - Tape, Pressure Sensitive, Adhesive, Preservation and Sealing. - Coating System, Nonskid, for Roll or Spray Application (Metric). - Antifreeze, Ethylene Glycol, Inhibited, Heavy Duty, Single Package. - Coating, Aliphatic Polyurethane, Che
10、mical Agent Resistant. - Coating, Aliphatic, Polyurethane, Single Component, Chemical Agent Resistant (CARC), Lead and Chromate Free. Storage of, Packaging of. - Vehicle, Wheeled, Preparation for Shipment and STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-1
11、29 MIL-STD-209 - Slinging and Tiedown Provisions for Lifting and MIL-STD-810 - Environmental Test Methods and Engineering MIL-STD-889 - Dissimilar Metals. MIL-STD-1261 - Arc Welding Procedures for Constructional Steels. MIL-STD-1791 - Design for Internal Aerial Delivery in Fixed Wing Attributes. - M
12、arking for Shipment and Storage. Tying Down Military Equipment. Guidelines. Aircraft (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191
13、11-5094.) . Prior to first article approval, the contractorsshall submit, for approval, a filtration procedure for the hydraulic system. exit side of the valve control, and the hydraulic reservoir. Hydraulic fluid samples shall be taken between the 6 Provided by IHSNot for ResaleNo reproduction or n
14、etworking permitted without license from IHS-,-,-MIL-T-53031A 54 9999906 0487L48 5 = _- _ MIL-T-53031A(ME) Quantity (max) 1000 100 40 .-. 10 3.8.2.2 Pre-operation cleanliness. The assembled hydraulic system, as shown on 1322636251, including all Government-furnished hydraulic components (see 3.6), s
15、hall be flushed and the hydraulic fluid cleanliness level shall be in conformance to table I. TABLE I. Contamination limits (particles per milliliterl. Particle Size Greater than 10 microns Greater than 20 microns Greater than 30 microns Greater than 40 microns - ,* J 3.8.3 System performance. The h
16、ydraulic system, as shown on 1322636251, shall be filled with the specified fluid, bled of air, and adjusted to assure acceptable performance of each hydraulic function. The controls and components of the hydraulic circuitry shall start, correctly operate, and stop all hydraulic functions in a smoot
17、h controlled fashion without binding, chatter, erratic response, vibration, or abnormal noise. The hydraulic pump shall develop a minimum of 2400 pounds per square inch (psi) at 1000 engine revolutions per minute (rpm) when the hydraulic oil temperature is 180 OF, 5 OF. 3.,8.3.1 Liftindloadins. The
18、assembled transporter shall be capable of lifting an interior bay assembly using the high-bank launch procedure as described in the approved technical manual (TM). 3.8.4 Cvlinders. Cylinders shall be fully charged with hydraulic oil conforming to MIL-L-2104, which meets the contamination limits spec
19、ified in table I. Exposed piston rod threads shall be protected with threaded steel protectors (see 5.1.1.8). Ports shall be.plugged with threaded steel plugs. 3.9 Treatment and painting. Cleaning, treatment and painting of components shall be in accordance with the applicable drawings, and as speci
20、fied herein. Where MIL-T-704, type F or G, paint is required, the finish coat shall conform to MIL-C-46168 or MIL-C-53039, camouflage green 383. Surfaces inaccessible for painting after installation shall be painted before installation. All surfaces, with the exception of the winch cable, glass, rub
21、ber, bearing surfaces, and the piston rod, shall be painted. Nonslip coating conforming to MIL-W-5044, type II or DOD-C-24667, type I, composition G, grade A, class 1, shall be applied to all walkway surfaces, the top surface of the front support, and the top surface of the boom assembly, as observe
22、d in the folded or down position. MIL-W-5044 or DOD-C-24667 nonslip coating, and MIL-C-46168 or MIL-C-53039 top coat. The sequence of application shall be MIL-T-704 primer, 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-53031A 54 9999906 O48
23、7349 7 MIL-T-53031A(ME) 3.10 MarkinS. Identification markings, level indications, jacking and lifting points, warnings, and all other marking shall be as specified on the a applicable drawings. 3.11 Government-loaned Droperty. When specified (see 6.2), any or all of the following property in the qua
24、ntities indicated will be loaned by the Government (see 6.5): I tem Ouantitv De SCriDt ion Identification 1 1 Bay Assembly, Interior 5420-00-071-5322, type I 2 1 Bay Assembly, Ramp 5420-00-497-5276, type II 3 1 , Sling, Bay Lifting 3940-00-214-7493 4 1 Snatch Block 3940-00-338-5653 5 1 Operators Man
25、ual TM5-5420-209-12 3.12 Performance, The transporter shall perform as specified herein without evidence of any of the following defects: a. Malfunctioning of components. . b. c. Permanent distortions (other than normal wear). d. e. f. External hydraulic leakage, g. Failure of hydraulic systems to o
26、perate as required. h. Binding of parts or improper fit during launching and retrieving of bridge bays. Material defects such as cracks and open joints. Failure of mechanical mechanisms to operate as required. Failure of winch to operate as required. 3.12.1 Operational characteristics. The transport
27、er shall: . b- a. b. Perform “high-bank“ launches and retrievals as described in the Be capable of launching a bridge bay within 5 minutes and retrieving it within 10 minutes. approved technical manual (TM). 3.12.2 Equipment mblications. Operating and maintenance functions of the transporter shall c
28、onform to applicable sections of the approved TM (see 3.11 and 6.5). 3.13 Reliability. The transporter shall exceed acceptance.criteria based on an upper test value of 50 mean missions between failure (MMBF) and a lower test value of 40 MMBF. A mission consists of the required transport distance and
29、 one launch/retrieve cycle (see 4.5.2.12.1). 3.14 Maintenance ratio. The transporters shall have a maintenance ratio of not more than 0.183. Maintenance ratio (MR) is defined as the ration of the total active maintenance man-hours required (scheduled and unscheduled) to the total operating time. sch
30、eduled before-and-after operation checks are excluded, schedule shall be established prior to the start of any testing. Man-hours for repair of replaced components and A maintenance 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.15 Interchangeab
31、ilitv. All parts, components and assemblies having the same identification number shall be functionally and dimensionally inter- changeable. Interchangeability is defined as two or more parts (components and assemblies) possessing such functional and physical characteristics as to be equivalent in p
32、erformance and durability and capable o being exchanged one for the other without alteration of themselves or of adjoining parts (components and assemblies), except for built-in adjustment, and without selection for fit and performance. 3.16 Suecification-control items and source-control items. Prio
33、r to using any specification-control item other than a suggested source item, the contractor shall furnish to the contracting officer evidence that the item conforms to all requirements on the applicable drawing. The contractor is responsible for performing all inspections and tests on specification
34、 or source control items if not performed by the vendor. No change shall be made to any source or specification control item after approval of the first article without prior approval by the contracting officer. 3.17 WorkmanshiD. 3.17.1 Transporter assembly. The transporter shall be assembled in acc
35、ordance with the requirements specified on the applicable drawings and specifications. All parts, components and assemblies containing moving parts shall be assembled free of harmful extraneous materials such as metallic particles, dirt, grit, or corrosion. 3.17.2 Castings and forgings. - Castings a
36、nd forgings which are components of the transporter shall be supplied free of harmful extraneous material such as sand, dirt, pits, sprues, scale, and flux. Rework shall be limited to procedures which do not reduce strength or affect function. 3.17.3 Metal fabrication. Metal used in fabrication shal
37、l be free from kinks and sharp bends. that will not cause injury to the material. Flamecutting, using tips suitable for the thickness of the steel, may be employed instead of shearing and sawing for steel only. made with controlled means to ensure uniformity of size and shape, shall be taken to avoi
38、d overheating. slowly, requirements prior to joining (welding). limited to those shown on the end product drawings. be free of burrs, sharp edges and corners, except when sharp edges or corners are required or where they are not detrimental to safety. The straightening of material shall be done by m
39、ethods Corners shall be square and true. All bends shall be Heated steel shall be allowed to cool All parts shall be completely and accurately shaped to the drawing Precaution Joints, butts and splices shall be External surfaces shall 3.17.4 Steel welds. The weld types, materials, sizes, and quality
40、 of soundness shall conform to the weld requirements specified n the applicable drawings. contractor shall prepare welding procedures and workmanship specimens in accordance with the requirements of MIL-STD-1261 and shall submit such procedures and specimens to the Government. Production welding sha
41、ll be permitted only after submitted procedures and specimens have been approved by the Government. The surfaces of parts to be welded shall be free from rust, scale, paint, grease, and other foreign matter. Welds shall transmit stress Prior to the production fabrication of any steel weldment, the 9
42、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-53033A 54 W 9999706 0487353 5 W without permanent deformation of failure when the parts connected by the welds are subjected to proof and service loading. welds shall be brought into as close con
43、tact as possible and in no event shall be separated by more than 3/16 inch unless appropriate bridging techniques are used. Parts to be joined by fillet 3.17.5 Care of welding electrodes. Care of welding electrodes specified for welding high-strength steel shall be as follows: a. When a container of
44、 welding electrodes is opened, the entire contents shallbe placed immediately in a baking oven, with electrodes placed not more than three layers deep on a tray, and baked either (i) for a minimum of 1 hour, but not more than 1-1/4 hours, at 800 OF; or (2) for a minimum of 4 hours at 400 OF. b. The
45、baked electrodes, while still warm, shall then be placed in a ventilated holding oven set at 250 OF to 300 OF. c. Not more than 1/2-hour supply of welding electrodes shall be taken from the holding oven at one time. d. If electrodes are out of the holding oven in excess of 1/2 hour but less than 1 h
46、our, they shall be returned to the holding oven for a period of not less than 1 hour. If electrodes are out of the holding oven in excess of 1 hour, they shall be returned to the baking oven and rebaked as described under II a II with any moist or wet surfaces, e. f. Electrodes removed for use shall
47、 not be allowed to come in contact Electrodes that have been in contact with water, grease or oil shall not be used. 3.17.6 Welders. Before assigning any welder or welding operator to the welding work covered by this specification, the contractor shall provide the contracting officer with certificat
48、ion that the welder or welding operator has passed qualification tests as prescribed by either of the following listed codes for the.type of welding operation to be performed and that such qualification is effective as defined by the particular code: ASME Boiler and Pressure Vessel Code, Section IX.
49、 AWS D1.l - Structural Welding Code - Steel. Contractors who make only horizontal welds need not qualify welders for all position welding. reserves the right to require retesting of any welder or welding operator. The test results shall be made available for review by the contracting officers representative. In the event of evidence of poor welds, the Government 3.17.7 Weld repairs. All areas of defective or unacceptable welds shall be repaired in accordan
