1、flIL-T-L7332 37 m 77777Ob 22bLb b m rJ-7 MIL-T-19332 (%A) 16 December 1955 MILITARY SPECIFICATION TRUCK, DOLLY, REFRIGERATOR CAR 1. SCOPE 1. 1 Scope. -This specification covers rectangular frame, refriger- ator car dolly trucks, equipped with 24 load wheels and 4 steer wheels. Refrigerator car dolly
2、 trucks are used for manual movement of pallet loads of material over smooth, rough or slatted floors for short distances, where maneuverability and rugged design are required to insure safe, efficient, and economical operation under extended service conditions. 1. 2 Classification. -Refrigerator ca
3、r dollies shall be of the following types, as specified in the contract or order: Type I - Trucks, dolly, refrigerator car, 2,500 pound capacity, 32 by 40 inch frame, solid rubber tired load wheels, high-tensile aluminum alloy steer wheels. Type II - Trucks, dolly, refrigerator car, 4,000 powd capac
4、ity, 40 by 48 inch frame, high-tensile alumi- num alloy load and steer wheels. 2. APPLICABLE DOCUMENTS 2. 1 The following specifications and standarde, of the issue in effect on date of invitation for bids, form a part of this specification. SPECIFICATIONS FEDERAL QQ-P-416 - Plating, Cadmium (Electr
5、odeposited) QQ-S-781 - Strapping, Flat; Steel TT-C-595 - Colors (for) Ready-mixed Paints FED. SUP. CLASS 3920 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-17332 37 W 777770b 022b17 W - . MILT-19332 (EM ) MILITARY MIL-T-704 - Treatment and
6、Painting of Materiel MIL-C-4749 - Casters, Rigid and Swivel, Precision, Heavy Duty MIL-P-116 - Preservation, Methods of STANDARDS MILITARY MIL-STD-129 - Markag for Shipment anc Storage MIL-STD-130 - Identification Marking of U. S. Military Property - (Copies of specifications and standards required
7、by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the Contracting Officer. ) 2. 2 Other publications, -The following publications, of the issue in effect on date of invitation for bids, form a part of this specification:
8、 CONSOLIDATED CLASSIFICATION COMMITTEE PUBLICATION Consolidated Freight Clas sification Rules (Application for copies of the above publication. should be addressed to the Consolidated Classification Committee, 202 Chicago Union Station, Chicago 6, Illinois. ) 3. REQUIREMENTS 3. 1 General. -Refrigera
9、tor car dollies covered by this specification shall be complete and ready for operation when delivered. car dollies shall be constructed and equipped to meet all requirements specified herein, as well as all other referenced federal and military specifications and standards. Refrigerator 3. 1. 1 Pre
10、production sample, -In all respects not specifically covered by this specification, the refrigerator car dollies shall be equal to the pre- production sample. The design, structural, and operational characteristics 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
11、e from IHS-,-,-MIL-T-17332 39 m 777770b 0282b18 T m MILT-19332 ( W) of this sample also will be evaluated for acceptability from a standpoint of safety and efficiency in operation, and for conformance with generally accepted design practice. Unless otherwise specified, a preproduction sample shall b
12、e submitted for examination, inspection, and test, to determine compliance with all provisions of this specification. The first refrigerator car dolly produced under the terms of a contract, following notice of award, may be submitted for approval as a prepro- duction sample, and approval shall be o
13、btained prior to fabrication of subsequent items. Fabrication of additional items prior to approval of the preproduction sample will be at the contractors risk and such additional items are subject to rejection in the event they fail to meet the requirements of this specification. The preproduction
14、sample refriger- ator car dolly, if conforming to this specification, will be used as a measurement guide for all dollies subsequently manufactured for a given contract under this specification, and will be presented for inspection as the last unit for delivery under the contract. Examination and te
15、sting, wherever practicable, will be conducted at the manufacturers plant by a representative of the Contracting Officer and the delivery schedule, under the terms of the contract, will be automatically extended in an amount equal to, but not exceeding, the time required for such testing and examina
16、tion. The time for testing is estimated at less than 15 days. 3.1.2 Material. -Materials shall be as specified herein. Material not definitely specified may be manufacturers normal commercial product, but shall meet test requirements specified in Section 4. “Normal commercial product“ shall be inter
17、preted to mean an item pro- duced by a manufacturer normally engaged in commercial production of the item(s) covered by this specification. The Government reserves the right to require any bidder, who proposes to furnish other than a cedent to the award of any contract, detailed engineering drawings
18、 of those parts he proposes to furnish in lieu thereof for approval of the Contracting Officer. normal commercial product to submit, prior to and as a condition pre- If 3.2 Structure 3.2.1 General. -The refrigerator car dollies shall be fabricated in accordance with the design and construction chara
19、cteristics as specified in this specification and Figure 1. Refrigerator car dollies shall consist of structural and formed steel channel frame, reinforced with hot rolled steel flats; solid rubber tired or all aluminum wheels; machine bolt axles; cold drawn seamless steel axle tube spacers and span
20、ners; steel springs; 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-and cadmium plated commercial hardware, frame shall be 30 by 42 inches for type I and 40 by 48 inches for type II. Overall height, when unloaded, shall be 7 114 inches for both ty
21、pes, frame, wheel supports, and all their joints shall prouide a rigid unit structure. permanent deformation, stresses induced by capacity loads and tests as specified in Section 4. Overall dimensions of the The Completed dollies shall be capable of withstanding, without 3.2.2 Frame. -The refrigerat
22、or car dolly frame shall be fabricated from commercial grade, structural steel channel, formed steel channel, and commercial grade, steel strip and bar, as shown in Figure 1. dolly frame shall consist of 2 wheel frames and 2 structural steel end channels joined to provide a rectangular frame, whose
23、overall dimensions, when measured at the top, shall be 30 by 42 inches for type I, and 40 by 48 inches for type II. Each wheel frame shall be of all welded construction, fabricated from 2 formed steel side frame members, 2 steel bar end frame members, 4 steel reinforcing corner pieces, and a load wh
24、eel supporting framework of steel bar and strip. Wheel frame length and width, measured at the top, shall be 37 1 /4 by 14 3 /8 inches for type I, and 45 114 by 14 318 inches for type II, Formed channel side frame members shall be bent or rolled, from steel strip having a minimum thickness of O. 134
25、5 inch (No. 10 USS gauge), into a modified “Z“ shape with a depth of 5 inches, bottom flange width of 518 inch, top flange width of 1 1/2 inches, and a 5/8 inch lip turned downward at the end of the top flange. Length of each channel side frame member shall be 37 114 inches for type I, and 45 114 in
26、ches for type II. Bottom corners shall be cut to provide a 2 inch by 45 degree bevel on the web of the channel. Corners of bottom flanges shall be cut back at a 45 degree angle and rounded to a 1 inch radius, Two end frame members, made from 1/4 inch steel bar, shall be welded, in a vertical positio
27、n, flush with the ends of the formed channel and butting against the bottom edge of the 5/8 inch lip. 1 /8 by 1 1 /2 by 2 inch long steel strip, shall be welded in each corner of the frame. lip and shall extend from the intersection of the inside surface of the lip and the end frame member to the in
28、side surface of the formed channel web, The wheel supporting framework shall have an overall length of 18 1/2 inches and sufficient width to fit snugly between side frame members. The wheel supporting framework shall be located centrally between the ends and 1/8 inch above the bottom of the wheel fr
29、ame. It shall be made from 2 lateral members, of 1/4 by 2 inch steel bar, and 5 equally spaced longitudinal members, of 1/8 by 2 inch steel strip. All wheel frame members shall be welded continuously around the periphery of their joints. Minimum weld size shall be the thickness of the minimum size T
30、he Corner braces, made from Braces shall nest in the pocket formed by the top flange and 4 I i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-member joined. Exposed surfaces on ends and top of the dolly frame shall be smooth and free from rough proj
31、ecting edges. provided in sides of wheel frames to accommodate l/2 inch diameter machine bolt axles. and 3 7/8 inches from the top of frame; and 4 holes on 3 1/2 inch centers, centrally located between ends of frame, with first and fourth holes 4 3/16 inches from the top of frame, and second and thi
32、rd holes 4 114 inches from top of frame. All holes on a single cetiterline shall be concentric, to accommodate the two, 1/2 inch diameter bolts which fasten wheel frames to end channels. Holes shall be on 10 inch centers and centrally located to mate with holes in end channels. End channels shall be
33、 made from 3 inch by 4.1 pound channel, 32 inches long for type I and 40 inches long for type II. Flange corners shail be rounded to a 112 inch radius. Clearance holes for four, 1/2 inch diameter bolts shall be provided in each channel as follows: 2 3/16 inches and 12 3/16 inches in from each end, a
34、nd 1 112 inches from top. Holes in end channels shall match holes in ends of wheel frames when wheel frame channel webs are flush with ends of end channel and top of wheel frame is flush with flange of end channel, channels by means of eight, 1 /2 - 13 by 1 inch, hex head bolts and mating, interfere
35、nce type lock nuts. Wheel frames and end channels shall be joined to provide a level frame. Holes shall be There shall be 2 holes, 4 inches in from the ends Two holes shall be provided on each end of each wheel frame The 2 wheel frames shall be joined to the structural steel end 3.2.3 Axles. -Axles
36、shall be 1/2 - 13 by 15 inch hex head, heat treated alloy steel machine bolts. races of the load wheel bearings. 1/2 - 13 inch, hex jam nuts. two, 314 inch, and two, 1/2 inch, cyanide hardened, plain steel washers. Axles shall be a snug fit to the inner Each bolt shall be provided with two, Each ste
37、er wheel axle shall be provided with 3.2.4 Axle tube spacers and spanners. -Axle tube spacers and spanners shall be made from 3/4 inch outside diameter, seamless, cold drawn steel tubing, with a wall thickness of O. 120 inch (No. 11 USS gauge). Axle tube spacers shall extend between longitudinal mem
38、bers of the wheel supporting framework to provide a snug fit in spaces not occupied by wheels. Their length shall be sufficient to provide a snug fit between the plain steel washers on the axle ends. medium fit when assembled to axle tube spacers. Axle tube spanners shall be provided on steer wheel
39、axles, Steer wheel bearings shall have a 3.2.5 Springs. -A compression type spring shall be assembled on each side of each steer wheel. Springs shall be made from O. 072 inch 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(No. 13 A. W. G.) wire, w
40、ound to a 15/16 inch outside diameter, 6 1/2 inches long, 18 full turns, with end coils closed and ground square. 3.2.6 Wheels 3.2.6.1 Load wheels, Type I. -Type I load wheels shall conform to the provisions of style 1, cured on tires, 6 inch size of Specification MIL-C-4749. Sleeves or inner bearin
41、g races shall be of sufficient length to provide a snug fit between the longitudinal members of the wheel sup- porting framework. Sleeves or inner bearing races shall be a snug fit to the mating axles. 3. 2. 6. 2 Load wheels, Type II. -Type II load wheels shall conform to the applicable provisions o
42、f MIL-(2-4749, 6 inch size, except that wheels shall be made from high tensile, aluminum alloy. capacity, including applicable safety factors, shall be not less than 600 pounds per wheel. Sleeves or inner bearing races shall be a snug fit to the mating axles. Minimum load 3.2. 6. 3 Steer wheels, typ
43、es I and II. -Steer wheels for types I and II shall be made from high tensile, aluminum alloy, equipped with bronze bearings. inches. Minimum load capacity, including applicable safety factors, shall be not less than 600 ponds per wheel. to the axle tubes. Wheels shall be 6 inches in diameter with a
44、 tread width of 2 Wheel bearings shall be a free fit 3.3 Accessories. -Unless otherwise specified, no accessories shall be provided. 3.4 Performance 3.4.1 Maximum load. -The refrigerator car dolly shall show no permanent deformation or failure following initial static test under 200 percent of rated
45、 load for a period of 1 hour. 3.4.2 Rolling force. -When loaded with a uniform rated load and towed;at a constant speed of 2 miles per hour over a smooth concrete floor, refrigerator car dollies shall require a maximum towing force of not greater than 2 percent of the gross weight of load and dolly,
46、 as measured by a tension dynamometer mounted between the refrigerator car dolly and the towing device. 3.5 Other requirements 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-19332 37 = 9939706 0282622 I MIL-T-19332 (SU) 3.5.1 Bearings. -Bear
47、ing load capacity, including applicable safety factors, as rated by the bearing manufacturer, shall be equal to or greater than maximum bearing loading under normal trailer operation, 3.5.2 Grease fittings. -Grease fittings shall conform to the manu- facturers normal commercial practice. 3.5.3 Steel
48、 fabrication. -All edges shall be smooth, rounded, and free from burrs or jagged edges. 3. 5.4 Welds. -Welded joints shall be sound; smooth; free from pits, holes, fissures, and rough projecting edges; and shall be thor- oughly fused to the base metal. 3.5. 5 Bolts and nuts, -All hardware shall be t
49、reated and plated in accordance with Specification QQ-P-416. 3.5.6 Workmanship. -Finished items shall be clean, well made, and free from any defects which may affect appearance or serviceability. 3.5.7 Finish 3.5. 7. 1 Treating and Painting. -All metal parts, except wheels, axles, and springs, shall be painted in accordance with the provisions of Specification MIL-T-704. The finish color shall be brilliant ye
