1、flIL-T-17q73H 37 W 777770b 0282373 9 MIL-T-17491H (SA) 31 October 1986 Superceding MIL-T-17491 26 OcWBE2 1981 MILITWU SPECIFICATIU? TRUCKS, HANL), LIET, PALLEX, WSlLJ.AL - HYDRAULIC FOK WIPEDART3 USE (6,000 Pound Capacity) . This specification is approved for use by the Naval Supply System Command,
2、Deprtment 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 covers heavy duty, iianually operat?lay no evidence of corrosion wnen the truck is tested in accordance with 4.5.2.10 and 4.5.2.12. Tne nydrauic reservo
3、ir shall be providal with an accessible filler 3.5.6.2 hitting cird lowering mechanism. The lifting mechanism shall be controlled and operated by either the handle of the truck, a lever separate and independent of tne handle, or by a foot pedal. by means of a pressure-release device that is independ
4、ent of the lifting mcnanism. The mechanism snall be located in a position so that the operator is not enuanyered when lowering the loae tested as specified in 4.5.2.1 through Failure of any test shall be cause for rejection. 4.4 Quality conformance inspection. 4.4.1 Sqlincj. When specified (see 6.2)
5、, sampling for examination and tests shall be in accordance with MIGSTI)-105. A lot shall consist of all trucks offered for acceptance at one time. be one fully assembled truck. The sample unit for his inspection snall 4.4.1.1 Preproduction truck. Unless otherwise specified, a preproduction truck sh
6、all be examined in accordance with 4.5.1 and shall be tested in accordance with 4.5.2.1, 4.5.2.2, 4.5.2.5, and 4.5.2.6. In addition, the brakes and hydraulic pressure release, if provided,shall be activated and observed for norm1 function on a level surface. requirements or to function properly shal
7、l be cause for rejection. Failure to meet specified 4.4.2 Examination. Samples selected in accordance with 4.4.1 shall be exanuned as specifled in 4.5.1. 1.5 tor major defects and 4.0 for total defects, expressed in terms of defects per nundred units. Inspection shall be level II with an AQL of 4.4.
8、3 Tests. specified in 4.5.2.1 through 4.5.2.4 and 4.5.2.6 tnrouyn 4.5.2.8. level snall 13e S-1 with an AQL of 4.0 defects expressed in terms of defects per nundred units. Samples selected in accordance with 4.4.1 shall be tested as Inspection 4.5 Inspection procedure. 4.5.1 Examination. follming def
9、ects: The trucks shall be examined as specified herein for the ivhior 101. Dimensions not as specified. 102. Any characteristic not in accordance with specified requirements. 1030 104. Assembly or components fractured, split, bowed or malformed. 105. Part misplaced, loose, or not in correct alinemnt
10、. 106. Sharp burr, sliver, or splinter. Part missing or not specified type or size. 11 Licensed by Information Handling ServicesPUGT-17491H (SA) 107. Castings not as specified. 108. Welds riot as specifie, missing, incomplete, cracked, not correctly fused. 109. Lubrication and fittings not as specif
11、ied. 110. Truck perceptibly out of square or alinement. 111. Plating not as specified, missing, or evidence of rust or corros ion. 112. Treatment and painting not as specified. Minor 201. Identification mrking missing, inconplete, not legible. 202. Equipment manual missing, incomplete, not legible.
12、203. lhreaed fasteners missing, broken, stripped, or loose. 204. Finish not dry, free of runs, sags, area of no film, wrong color. Identification plate not as specified. 205. 4.5.2 Tests. 4.5.2.1 Test conltion. Prior to test, the truck shall be lubricated with oils m greases as recommended by the su
13、pplier. the order listed. Tests shall be conducted in 4.5.2.2 Rated load. rated palet load, insert forks into and raise the loaded pallet until the top surfaces of the forks are elevated 4 inches (102 m) above their fully lowered psition. Record the number of strokes and force required to lift the r
14、ated load while raising the forks from the fully lowered position to an elevation 4 inches (102 mm) above their lowered position. constitute failure of this test. Using a military pallet conforming to IvlIL-P-15011, with a Lbnconforniance to 3.6.1 shall 4.5.2.3 Maximm load. Prior to conducting this
15、test, and the test specified in 4.5.2.4, the pressure-relief valve,if provided,shail be made inoperative and the truck shall be equipped with steel wheels. surface plate and with forks at mimum height, the following heights shall be measured, the wints of measurement marked on the truck, aM3 recorde
16、d: With the truck placed on a (a) Front end of frame. (b) Front pivot point of raising and lowering mechanism. (c) Tw of forks at heel an both sides. 12 Licensed by Information Handling Services_ MIL-T-17LI43H 37 777770b 0282385 5 (d) fop of forks midway between front and rear pivot wints of raising
17、 and lowering mechanism on koth sides. (e) Rear pivot point of raising and lavering mechanism on both sides. (e) Kear pivot point of raising and lowering mechanism on both sides. Then place the truck on a smooth, dry, level concrete surface and elevate the forks to the mximum lift height. pounds (SM
18、0 kg.). Hold the truck in this positioai for not less than 1 hour. At the end of 1 hour, measure dmward drift, then remve the load and pace the truck on the surface plate. Repeat measurements (a) through (e). Examine the truck for damage anu permanent deformation. Damward drift exceeding 1/8 inch (3
19、 m) any variation in height dimensions in excess of 1/16 inch, (1.6 nun) or evidence of damge or perment deformation shall constitute failure of this test. Place on the elevated forks a load of 12,000 4.5.2.4 55ock load. pounds (2720 kg) and tignten joints to compensate for settling. loaded truck of
20、f the 1-inch (25 m) high platform at a speed of 2 (3.2 km/hr) 10 times. Measure and record the heights specified above. Examine the truck for damage and permanent deformation. distortion and binding. Any variation in measurements between the two series of measurement in excess of 1/16 inch (1.6 mm)
21、evidence of damage or permanent deformation, or evidence of distortion or binding of the wheel bearings shall constitute failure of this test. Place on the truck a uniformly distributed load of 6,000 Rd1 the Examine wheel bearings for 4.5.2.5 Pallet entry and withdrawal. An ewty double faced, Measur
22、e distance from the reference line Repeat this procedure 10 4.5.2.6 Steering. Place the truck carrying a rated load, on a smth, dry, level concrete surface. attach a tension dynamometer to the handle. dynmmeter tangent to the arc through which the handle mves. force required to turn the handle. fail
23、ure of this test. Place the handle in the central pulling position and Apply a force to the tension Measure the Nonconformance to 3.6.5 shall constitute 4.5.2.6.1 Steer handle. Place the truck on a level surface with the handle in the releasd upright position. Aply a horizontal force of 300 pounds (
24、136 kg) mini- to the top of the handle and pull twards the load end of truck and examine. shall constitute failure of this test. Block and secure the truck to the floor. Nonconforniance to 3.6.5.1 13 Licensed by Information Handling Services4.5.2.7 Leakage. After successful completion of the above t
25、ests, turn the truck on its side on a clean paper surface. position for 30 minutes. and the paper surface for oil and grease spots. constitute failure of this test. Allm the truck to remain in this Evidence of any leakage shall Examine the actuator reservoir, the hydraulic lines 4.5.2.8 Holling forc
26、e. Weigh the truck carrying a rated load. Place the truck on a dry, smooth, level concrete surface of sufficient length to conduct the test. dynammeter. Accelerate the tractor-truck combination to a minimum speed of 2 mph (3.2 km/hr). truck is being twed at 2 nph (3.2 km/hr).Deactivation of deadman
27、brake is preirlissible in order to perform this test. Nonconformance to 3.6.7 snall constitute failure of this test. Couple the truck to an inustrial-type tractor through a tension Determine the maximum reading of the dynmmeter while the 4.5.2.9 Wurance. The truck shall be pulled or towed at a speed
28、 of 1.5 (2.4) to 2 miles pr hour (3.2 km/hr) in a SO-foot (15.2 m) diameter circle for a period of 6 hours with the rated load on the forks. times around the circle shall be 50 in 1 hour. inch (19 mn) high by 2 (50 mm) inch wide iron,wood,concrete or steel blocks as obstaces, 180 degrees apart and o
29、ver which the truck shall be pulled each time around the circle without reduction in speed. forks shal be completely raised and lowered 10 times, with the load on the forks. travel around the circle reversed ea& hour. adjustments allowed during the complete endurana? test. wheel(s) or replacement of
30、 polyurethane tires as required during endurance testing is acceptable.&activation of deadman brake is permissible in order to periorm this test. Inability of the truck to be fully operational after completion of the test shall constitute failure of tnis test. The minimum number of The circle shall
31、have two 3/4 At the end of each hour the nie conqlete cycle shall be repeated five times with the direction of There shall h no repair or The use of steel 4.5.2.10 Salt toy. Test Aethod 509. may be tested separately instead of the assembled truck. trua is tested, following the start of exposure to s
32、alt fog rio function or component of tne truck shall ue operated prior to completion of the exposure m wing periods. The following details required by MIL-STD-810 are designat ec . The truck snall be tested in accordance with MIL-SIID-810, At the option of the supplier, all the individual components
33、 If the assembled (a) shall be in accordance witn the preparation of test item procedure specified in r4IL-SD-8l, Test Method 509. truck, including piston rods which shall be at maximum extension, shall be cleaned and shall be exposed to salt fog througnout the test. such as bearings which are norma
34、lly lubricated shall be lubricated prior to the test. surfaces and assemblies which are normally lubricated may be lubricated prior to test. maximum extension shall be cleaned and exposed to salt fog as described above. whether assembled before or after salt fog expocure, shall be in accxxdance with
35、 4.5.2.2, 4.5.2.3, 4.5.2.5, 4.5.2.6, 4.5.2.7, 4.5.2.8, 4.5.2.12. requirements shall be cause for rejection. Preparation ot the assenbled truck prior to exposure to salt fog All exterior surfaces of the Components If the truck is tested as unassembled compnents, those All other surfaces including pis
36、ton rods which shall be at Pretest and post-test data required of the assembled truck, Evidence of harmful corrosion or failure to meet performance 14 Licensed by Information Handling Services4.5.2.11 Drop. dropped thKtimes from a height of 3 feet (914 mm) to a level concrete surface. lavering the f
37、orks and mve the truck not less than 6 feet (i830 mm) and operate the controls. failure shall constitute failure ot this test. for compliancle witn 3.1, maximum weight, and with 3.5.8, including hook size. The truck shall be lifted by its lifting points and shall be Examine tne truck. fien operate t
38、he unloaded truck -by raising and Evidence of failure of any coiriponent, or operational Prior to first drop, inspect MIL-T-1747LH 37 = 797770b 0282387 7 m MIL-I-17491H (SA) (b) Salt solution shall be 5 percent. (c) Assembled truck shall be on its side, supported by 2-inch (50 mm) by 4-inch (100 mm)
39、 wood blocks. If truck is test& as unassembled components, larger components shall be in position they would occupy if in assembled truck lying on its side, supported by 2 x 4 (50 X 100 nun) wood blocks or suspended by corrosion-resistant cord: light conpnents shall be suspended by light corrosion-r
40、esistant cord, by hooks, or a slotted rack. (d) Salt fog exposure period shall be 72 hours. (e) loosely covered with transparent plastic to retard drying and permit visual observation. The drying period shall be 168 hours at room temperature while (f) Visual inspection. No operation after 24 hours.
41、Visual inspection. No opration after 72 hours. No wasning or operation prior to completion of exposure and drying. 4.5.2.10.1 Failure criteria. Nonconformance to 3.6.10 shall constitute failure of tnis test. 4.5.2.12 Brake. The truck, with forks at maximum elevation, shall be subjected tosimulated r
42、ainfall of not less tnan 4 inches (102 mm) per hour. Tne simulated rainfall shall impinge on the truck at an angle of 45 degrees plus or mhus 5 degrees with a force equivalent to a 30 qh (48 km/hr) wind. Tne simulated rainfall shall dispense uniformly over the surface of the truck. The top and left
43、side of the truck shall be exposed to the rainfall for a period of 30 minutes, followed by exposing the top and right side of the truck to the rainfall for a pericd of 30 minutes. Immediately after exposure to the simulated rainfall the brakes shall be tested as specified nerein. The truck, carrying
44、 6000 pourids (2720 ky) on a pallet, shall be positioned on a 6-degree slope with forks damslope. The test shall be conducted on a steel ramp coated with a covering conpund conforming to MIGD-23003, type II, to provide a nonslip surface. In addition, the surface shall be thoroughly wetted. On this s
45、lop the brakes shall be set and released a minimum of five times. carrying 6000 pounds (2720 kg) on a pallet, with forks upslope and raised to mimm hei$& and with brakes applied shall be positioned on the wet ramp while level. The rang? shall be raised to a 154egree slope or until the truck with ste
46、er Wheels locked begins to slide, whichever occurs first. The entire test shall be repeated with forks downslope. be cause for rejection of the truck. The truck Non-conpliance with 3.6.8 shall 15 -. Licensed by Information Handling Services- MIL-T-L7LiLH 39 W 9999906-0282388 O 4.6 4.6.1 Inspection o
47、f packaging and preparation for elivery. Quality conformce inspection of pack. 4.6.1.1 Unit of product. For the purpose of inspection, a completed pack prepared for snipment shall be considered a unit of product. 4.6.l.2 Sanpliny. Suy?liny for examination shall be in accordance with f.IICSU-105 0 4.
48、6.1.3 fixamination. -les selected in accordance with 4.6.1.2 shall be examined for the following defects. inspection level II. ALIL shall be 2.5 percent defective, 113. Materials, metnos, or containers not as specified for level A or 8. Each incorrect material, methd or container shall constitute on
49、e defect 114. Disassembly not as specified for level A. 115. Kemved cowrients not secured as specified for level A. 116. Lubrication not applied as specified for level A or C. 117. npainted surfaces not coated with preservatia as specified for level A. 18. 119. 120. klydraulic system not filled as specifid for level A or C. Manual not preserved and secured as specified for level A or C. Blocking, bracing, and anchoring not adequate to prevent mvement and damage as specified for level A or B. 121. Strapping not zinc coated for level A. 122. Narking
