1、A-A-50499A 38 m 9997774 00b539b 7 = INOT MEASUREMENT I SENSITIVE A-A-50499A May 11. 1992 SUPERSEDING 26 July 1990 A-A- 50499 COMMERCIAL ITEM DESCRIPTION TAMPER, VIBRATING PLATE TYPE, GASOLINE AND DIESEL ENGINE DRIVEN The General Services Administration has authorized the use of this commercial item
2、description (CID) as a replacement for MIL-T-28623B(YD) which is canceled. Abstract. This document covers commercial, manually controlled, vibrating plate type tampers, powered by a gasoline or diesel engine. The tamper is intended for use in compacting fine and coarse grained soil and finishing hot
3、 and cold mixed asphalt in areas inaccessible by large self-propelled compacting equipment, This CID covers two classes of tampers as follows: Class 1 - Gasoline Engine Powered Class 2 - Diesel Engine Powered Salient Characteristics. The tamper shall consist essentially of a powerplant, power train,
4、 vibrating mechanism, base plate, handle, wheels or a transportation cart, and a sprinkler system. The tamper shall conform to the dimensions and weight specified in table I. TABLE I. Dimensions I Maximum I I I I Minimum I I Base plate: I I I I Overall width I 19 in (482 mm) I I 21 in (533 mm) I I I
5、 I I I I I I I I I I 230 lb (104 kg) I I I Overall length I 20 in (508 mm) I 25 in (635 mm) I Effective area I Operating weight I 150 lb (68 kg) I 198 in2 (127,750 mm2) I 280 in2 (180,656 mm2) I IBeneficial comments (recommendations, additions, deletions) and any pertinent1 Idata which may be of use
6、 in improving this document should be addressed to: I Icommanding Officer (Code 156), Naval Construction Battalion Center, Port I Hueneme, CA 93043-5000. I FSC 3895 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. a Provided by IHSNot for ResaleNo reproduction or net
7、working permitted without license from IHS-,-,-A-A-50497A 38 9999774 0065397 7 m A-A-50499A 1. All rotating or reciprocating parts and all parts subject to high operational temperatures, that are of such a nature or are so located as to be or become a hazard to the safety of the operating personnel,
8、 shall be insulated, enclosed, or guarded to the extent necessary to eliminate the hazard. tamper shall comply with applicable Department of Labor (DOL), Occupational Safety and Health Administration (OSHA) regulations in effect at time of manufacture. For noise limitation, the tamper shall comply w
9、ith OSHA documents. Safety. The 2. to all parts for maintenance and repair in the field by use of conventional general-purpose tools associated with tampers. component parts and accessories shall be accomplished with minimum disturbance to other elements of the tamper. Intricate locking devices, con
10、trols, and threaded fastenings that can be easily over-torqued shall be avoided. plates that must be removed for component adjustment or for parts removal shall be equipped with substantial, quick disconnect fastenings. Accessibility to lubricating oil fill openings, fluid checking devices, and drai
11、n plugs shall be provided without the need of removing or adjusting accessories and parts. Ease of maintenance. Design of the tamper shall permit ready accessibility Replacement and adjustment of Covers or 3. Operational requirements. The tamper shall be capable of operating satisfactorily in ambien
12、t temperatures from O degrees Fahrenheit (OF) up to 125OF. 4. the tamper shall withstand the strains imposed upon it without receiving any damage or deformation. concrete between the temperatures of 60F and 210F to 92 to 94 percent compaction (6 to 8 percent air voids). between 190F and 210F, not mo
13、re than six passes with the tamper will be required to achieve the required compaction. temperature is between 90F and 190F, not more than ten passes with the tamper will be required to achieve the required compaction. be used for only the first two passes when material temperature is between 60F an
14、d 140F and for all but the final two passes when material temperature is between 140F and 210F. without any evidence of washboard, rills, dips, depressions, and projections. The asphalt material, hot and cold mix, and compaction test method shall be in accordance with the requirements for the locati
15、on where the performance test is conducted (if no local standard is enforceable, use California State Highway Department SS-1 standards). The tamper shall compact both fine and coarse grained soils as classified in accordance with ASTM D 2487. determined by ASTM D 1557, shall be not less than 90 per
16、cent for both soils. Not more than six passes with the tamper shall be required to compact the fine grain soil. compact the coarse grain soil. The tamper shall travel at a maximum forward speed of not less than 50 feet per minute without any assistance from the operator except directional control. v
17、ibrating mechanism in particular, shall be designed to protect against the harmful effects of dust, water, and temperature. Performance. When operating at maximum frequency and as specified herein, The tamper shall be capable of compacting asphalt When the asphalt concrete temperature is When the as
18、phalt concrete The water sprinkler will Surface of the compacted asphalt will be smooth, Maximum density, as Not more than ten passes with the tamper shall be required to The tamper in general, and the engine and 5. Powerplant. The class 1 tamper shall be powered by a four-stroke, air cooled, gasoli
19、ne engine, which operates on unleaded fuel. The class 2 tamper shall be powered by a four-stroke, air cooled, diesel engine. The tamper shall be powered by the manufacturers standard commercial engine normally .furnished to the commercial market for that tamper. The power and speed necessary to meet
20、 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-504e17A 38 9377774 0065378 O A-A-50499A the performance requirements of the tamper shall not exceed the continuous rated horsepower and maximum rated engine speed. The engine shall be furnished w
21、ith accessories normally equipped on the manufacturers standard commercial tamper and have, as a minimum, the following: a. A governor set to keep the engine from exceeding the maximum b. A fuel tank with a capacity of not less than 1/2-gallon (gal) c. A suitable serviceable dry type or oil bath typ
22、e intake air d. Manual speed control and choke. e. A recoil starter. f. Stop control. g. An exhaust muffler. rated engine speed. (2 liters (L). cleaner. 6. The tamper shall be equipped with a gravity feed type sprinkler system. The sprinkler system shall wet the full width of the base plate and shal
23、l prevent asphalt sticking to the underside of the base plate. The sprinkler system shall include a storage tank, plug valve, feeder hose, and distributor hose or pipe. Sprinkler system. 7. lifting handles, and two transportation wheels or a two-wheeled transportation cart. The maneuvering handle sh
24、all serve as a control handle and as a transportation handle. As a control handle, it shall allow the operator to control travel speed and direction of travel. As a transportation handle, it shall allow the operator to push or pull the tamper, balance it, and control its direction of travel. Not les
25、s than two lifting handles shall be provided. When two lifting handles are furnished, they shall be located on the tamper in positions that shall assure the tamper will remain in a relatively horizontal plane while being lifted. Transportation wheels shall be pneumatic or semi-pneumatic. Transportab
26、ility. The tamper shall be furnished with a maneuvering handle, 8. Lubrication. Means for lubrication shall be in accordance with the manufacturers standard practice. visible and accessible. Hydraulic lubrication fittings shall be in accordance with SAE 5534. pound-force per square inch (70.3 kilogr
27、am-force per square centimeter) or higher, will damage grease seals or other parts, a suitable warning shall be affixed to the equipment in a conspicuous location. The unit shall be lubricated prior to delivery with the type 0.f lubricant specified in the owners manual and grade of lubricant recomme
28、nded for ambient temperature at the delivery point. lubricants and their temperature range. The lubricating points shall be easily Where use of high pressure lubricating equipment, 1,000 The unit shall be conspicuously tagged to identify the 9. Identification markina. Identification shall be permane
29、ntly and legibly marked directly on the tamper or on a corrosion resisting metal plate securely attached to the tamper by the manufacturer. Identification shall include the manufacturers model and serial number, name, and trademark to be readily identifiable to the manufacturer. 10. The tamper shall
30、 be equipped with instruction plates suitably located, firmly attached instruction plates describing any special or Instruction plates. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-50499A important procedures to be followed in operating and
31、servicing the equipment. Plates shall be of a material which will last and remain legible for the life of the equipment. Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this CID, and that the pr
32、oduct conforms to the producers own drawings, specifications, standards, and quality assurance practices. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. Metric produc
33、ts, Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of Federal Standard 376, and all other requirements of this CID
34、are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the contracting officer to determine if the product is acceptable. The contracting officer has the option of accepting or rejecting the
35、 product. Preservation, packaginE, packing, labeling? and marking. Preservation, packaging, packing, labeling, and marking shall be in accordance with the requirements of ASTM D 3951, unless otherwise specified in the contract or order. CID based part identification numbers (PIN). The following PIN
36、numbering procedure is for Government purposes and does not constitute a requirement for the contractor. A - 50499 - I I I I I I I I I I I Class CID Number I Designates a Commercial Item Description Notes, OrderinE - data. Acquisition documents should specify the following: a. Title, number, and dat
37、e of this document. b. Class required c. Size required. d. When regular grade gasoline shall not be used. e. When radio noise suppressors are required. f. Color of finish coat. ASTM D 2487, ASTM D 1557, and ASTM D 3951, are available from the ASTM, 1916 Race Street, Philadelphia, PA 19103. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
