1、I INCH-POUND I MIL-DTL-62267B (AT) 4 September 1998 SUPERSEDING 27 January 1997 MIL-PRF- 62267A(AT) DETAIL SPECIFICATION CHASSIS, TANK: ARMORED VEHICLE, BRIDGE LAUNCHER, M60Al This specification is approved for use by the U.S. Army Tank-automotive and Armaments Command, Department of the Army, and i
2、s available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of full-tracked tank chassis which with subsequent adaption mounts a 60 foot (ft) (18 meter (m) launched bridge. This specification is limited to the vehicular cha
3、ssis of the launcher. 2. APPLICABLE 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. While eve
4、ry effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirement documents cited in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any p
5、ertinent data which may be of use in improving this document should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-EIBLUE, Warren, MI 48397-5000, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by l
6、etter. AMSC NIA FSC 2350 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. T
7、he following specifications, standards, and handbooks form a part of this document to the extent specified 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 theret
8、o, cited in the solicitation (see 6.2). SPECIFICATIONS DEPARTMENT OF DEFENSE MIL-C-46 168 - Coating, Aliphatic Polyurethane, Chemical Agent Re sis tan t. STANDARDS FEDERAL FED -STD-5 95 - Colors Used in Government Procurement. (Unless otherwise indicated, copies of the above specifications, standard
9、s, and handbooks are available from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19 1 1 1-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this docume
10、nt to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. NUCLEAR REGULATORY CONMSSION (NRC) Code of Federal Regulations (CFR) - Title 10, Parts 30 and 40. (Unless otherwise indicated, copies of the above specifications, standards, and handbooks a
11、re available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) DRAWING ARMY 10934200 - Tank, Chassis, M60A1, Transporter, AVL Bridge. (C
12、opies of these drawings are available from the U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-E/BLUE, Warren, MI 48397-5000.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues
13、of the documents which are DoD adopted should be those listed in the issue of the DoDISS specified 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 NATIONAL STANDARD INSTITU
14、TE (ANSI) ANSIASQC 21.4 - Sampling Procedures and Tables for Inspections by Attributes (DoD Adopted). (Copies of ANSI documents are available from the American National Standard Institute, 11 West 42nd Street, New York, NY 10036.) 2.4 Order of precedence. In the event of a conflict between the text
15、of this document and the references cited herein, the text of this document should takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shal
16、l be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Unless specified herein, materials shall be in accordance with the manufacturers materials specifications. The materials shall be capable of meeting all the operational and environmental requirements specified herein.
17、All rubber used in construction of the chassis shall be ozone resistant. Asbestos, cadmium and radioactive materials shall not be used in this item. Radioactive material is defined by Title 10, CFR, Parts 30 and 40, and other radioactive material in which the specific activity is greater than 0.002
18、microcuries per gram or the activity per item equals or exceeds 0.01 microcuries (see 4.5.1). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovere
19、d, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs (see 4.5.1). 3.3 Design and construction. Chassis components, sub
20、assemblies, and assemblies shall be fabricated into a complete chassis in accordance with Drawing 10934200, drawings subordinate to 10934200, and applicable specifications and standards. All parts requiring identification shall be marked in accordance with the drawing (see 4.5.2). 3.3.1 Chassis reli
21、ability. Chassis shall demonstrate a minimum of 180 hours Mean-Time- Between-Failure (MTBF) during 4000 miles (6400 kilometers (km) of operational tests in accordance with the operational profile (see 3.3.3). For calculating MTBF, the definition of combat mission failures in the M60A1 Tank RAM-D fai
22、lure definition and scoring criteria shall be used (see 4.2.2.3). 3.3.2 Chassis maintainability. The chassis shall not exceed the following maintenance ratios (see 4.2.2.4): Organizational maintenance: 0.05 Direct support maintenance: 0.04 Combined maintenance: 0.09 The maintenance ratio shall be ca
23、lculated by dividing the total maintenance man-hours (exclusive of daily crew checks and services) by the total operating hours. 3.3.3 Operational profile. Profile shall consist of (see 4.2.2.2): a. 25 percent (%) on paved roads, either concrete or asphalt or any combination of the two. b. 25% on gr
24、avel and dirt roads with at least 10% of this distance under mud conditions. c. 25% on level, cross country. d. 25% on hilly, cross country. 3.4 Performance. After being subjected to the break-in run and procedures of 6.6, the chassis, loaded to simulate an M60A1 vehicle weight of 112 600 pounds (lb
25、s) (51 200 kilograms (kg), shall perform as specified herein under all operating conditions (see 4.5.4). 3.4.1 Power plant and power train. The power plant shall function throughout all gear and speed ranges without loss of lubricants or damage that may cause failure of the chassis. The power train
26、and associated controls shall be capable of operation throughout all speed and 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) steering ranges without binding of linkages, loss or lubricants, grabbing, chattering or slippage whe
27、n controls are applied to steer, stop, or hold chassis (see 4.5.4.1) 3.4.2 Environments. The chassis shall operate in ambient air temperature of 115 degrees Fahrenheit (OF) to minus (-) 25F (46 degrees Celsius (OC) to -31C) and with special equipment installed, at temperatures to -65F (-53C) (see 4.
28、5.4.2). 3.4.2.1 Cooling system. With chassis operating in ambient temperature of 115F (46“C), the engine oil temperature shall not exceed 250F (121C) at the heat exchanger outlet. The transmission oil temperature shall not exceed 300F (150C) at the heat exchanger inlet. Temperature indicators on the
29、 drivers panel shall remain in the green area (see 4.5.4.2.1). 3.4.3 Level road acceleration. The chassis shall accelerate from a standing start on level road through a distance of 200 ft (61 m) in a time period of not more than 13 seconds (see 4.5.4.3). 3.4.4 Level road speeds. The chassis shall op
30、erate at sustained minimum and maximum speeds of 2.5 miles per hour (mph) (4 kilometers per hour (M) and 30 mph (48 kmh) on level road without damage to power plant and power train (see 4.5.4.4). 3.4.5 Level road drift. When traveling between 25 and 30 mph (40 and 48 kmh) on level road, in a straigh
31、t line the chassis drift shall not exceed 3 ft (1 m) in 100 ft (30 m), without manual steer correction (see 4.5.4.5). 3.4.6 Level road stopping. The chassis traveling at 20 mph (32 km/h) on level road, shall stop within 60 ft (18 m) from point of brake application. Drift shall not exceed 4 ft (1.2 m
32、). Steering correction is allowed (see 4.5.4.6). 3.4.7 Grades and slopes. Chassis shall ascend longitudinal grades of 60% in forward and reverse gear without stalling or damage to power plant and power train. Chassis shall operate on right and left side slopes of 30%. During grade and slope operatio
33、ns, normal engine lubricating oil pressures shall be maintained (see 4.5.4.7). 3.4.7.1 Engine starting (aades and slopes). Chassis standing on a 60% in grade for not less than 2 minutes and with engine idling under no load between 700 and 750 revolution per minute (rpm), the engine shall be stopped
34、for not less than 2 minutes. The engine shall restart in not more than 1 minute when headed either up or down grade. A similar engine stopping and starting test shall be accomplished on 30% right and left side slopes (see 4.5.4.7). 3.4.7.2 Fuel supply (aades and slopes). During engine operation, the
35、 fuel system shall maintain fuel supply to the engine when ascending and descending 60% grades in forward and 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) reverse gear, and when chassis is being operated on 30% side slopes wi
36、th either side of chassis up slope (see 4.5.4.7). 3.4.7.3 Holding. With the chassis standing on a 60% grade, with service brakes applied, the chassis shall be held stationary when headed either up or down grade. With parking brake engaged and all other holding devices inoperative, the chassis shall
37、be held stationary when headed either up or down grade (see 4.5.4.7). 3.4.7.4 Grade speeds. The chassis shall operate at a sustained speed of 10 mph (16 km/h) while ascending a 10% grade and at 20 mph (32 km/h) while ascending a 3% grade (see 4.5.4.7). 3.4.8 Shallow water fording. Chassis shall ford
38、 a level, hard-bottom body of water 48 inch (in.) (1220 millimeter (mm) in depth, including wave, without special equipment. With the chassis standing in water 48 in. (1220 mm) in depth for 30 minutes, the accumulation of water shall be not more than 1.5 in. on the crew compartment hull floor measur
39、ed in the center of the “V” (see 4.5.4.8). 3.4.8.1 Engine starting (shallow water). With the chassis standing for 30 minutes in water 48 in. (1220 mm) in depth, the engine operating at 1000 rpm for 15 minutes, then stopped for 15 minutes, the engine shall restart in not more than 3 minutes. All acce
40、ssories shall function satisfactorily during and after fording operations (see 4.5.4.8.1). 3.4.8.2 Lubricant contamination. After fording operations, the water content of the transmission, engine, final drives, and suspension system lubricants shall be not more than 2% by volume (see 4.5.4.8.2). 3.4
41、.9 Trench crossing. The chassis shall cross trenches 36 in. (915 mm) in depth and 102 in. (2590 mm) in width without stalling or damage to suspension and other vehicle equipment (see 4.5.4.9). 3.4.10 Vertical obstacles. The chassis shall cross over vertical obstacles 36 in. (915 mm) in height while
42、moving forward without stalling or damage to suspension and hull floor, speed not to exceed 5 mph (8 km/h) (see 4.5.4.10). 3.4.11 Turning. The chassis shall turn 360” to the right and left in pivot, in neutral steer, within a circle 35 ft (10.7 m) in diameter (see 4.5.4. 11). 3.4.12 Sealing. Except
43、as specified in 3.4.8, all seals and sealer shall prevent the entrance of water and foreign matter under all operating conditions. Static seals shall provide an interference fit of sealing surfaces preventing the leakage of fluids intended to be contained by the seals. Dynamic seals shall prevent fl
44、uid leakage in the form of a drop (see 6.5) when the chassis is 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62267B (AT) standing idle. Evidence of lubricant at seals specifically designed to allow exit of flushed lubricants shall be per
45、mitted (see 4.5.4.12). 3.4.12.1 Escape hatch seal. The escape hatch seal shall prevent entrance of water into the crew compartment, under all operating conditions (see 4.5.4.12.1). 3.4.13 Controls. When installed in accordance with applicable drawings, all electrical, mechanical, and hydraulic contr
46、ols shall operate without malfunction throughout all ranges of operation under all chassis operating conditions (see 4.5.4.13). 3.4.14 Adjustment mechanisms. When installed and adjusted in accordance with applicable drawings, all adjustment mechanisms shall function properly and maintain adjustment
47、settings during all chassis operating conditions (see 4.5.4.14). 3.4.15 Generator. 3.4.15.1 Generator voltage. Generator voltage shall be regulated to not less than 27.8 Vdc and not more than 28.3 Vdc (see 4.5.4.15). 3.4.15.2 Generator blower motor. The generator blower motor shall be capable of del
48、ivering a constant flow of air through the generator (see 4.5.4.15). 3.4.16 Air cleaner blower motors. Each air cleaner blower motor shall provide a flow of air through each blower outlet. The air cleaner blower motors shall be wired to prevent blower operation when engine is not running (see 4.5.4.
49、16). 3.4.17 Lights. All lights shall operate as specified on applicable drawings through all chassis operating conditions. All electrical contacts and connections shall maintain positive contact under all chassis operating conditions (see 4.5.4.17). 3.4.18 Locking, unlocking and actuated mechanisms. 3.4.18.1 Hull drain valves. After unlocking lever, the force required to operate the front drain valve lever shall not exceed 17 lbs (7.7 kg) at the end o
