1、 h I - MIL-T- 17 wit rated load in ordor to inaure proper steering and mcweuvarabillty. The tmck shall be a four-wheal drive vahicla wiw1 rear wheel power hydraulio boost steering. Deaigri of Che truck ehall be Buch that; it will sperate rcstisfnctorily on either smooth pavement or rough terrain. fr
2、ont axle shall be rigidly affixed to the tractor frame to a8ure maximum rrtnbilAty, The truck shall be constructed to meet; present performance requirements and standards when tested a8 epacified herein. characteriatics of design as to result inthe maximum practicable combination of the requirements
3、 specified herein, with ease of aperLttion, eafetg and comfort for personnel, giimp7icitg of operation, protection for load, ease of maintenance, parts in- tercangeabilitg, and minimum requlrementa for use of special melntenance toola The The truck ahall incorporate such 3.1.1 222 inches including 4
4、2 inch forkfj. exceed 90 inches. not exceed 96 inches. Clearance under telescopic mast shall bo 56 inches or more. Overall inensiona.-Overrll length shall not exceed Overall width shall not Overall height including mast (collapse) rihall 813.2 Weigh% DLstribution.-l?ha residual load on ihe rear stee
5、ring whaea shal1 not be lesa than 25s of the combined full lead and truck weight. 31.3 least 2OU about a tranaverse aia. Oscllatirip: Axe.-Jlhe rear wheel axle shall oscillate at 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-17239 39 999990
6、6 0282004 -, . abIL-2-17239 ( BuOrd) 3.1.4 Water Fordhq.-The trucka shall be so designed that they will be capable of operating in 5 foot of water for 15 minutes, 3.1.5 Electrlcal System.-The electrical system provided shall be in accordance with I, C, C, regulations for over the road service, A two
7、 wire electrical system is required and wiring shall be housed in a flexiblemetallic conduit properly olipped to the chassis with mrbber gromets at all locations where the conduit passes through metal. 3.1.6 Radio Suppression.-The trucks shall be equipped with radio suppression equal to that which i
8、s normally provided a vehicle of this type. 3.1.7 Preproduction sample.-In all respects not specifically covered by thfs specification, trucks shall be equal to the preproduction sample. The preproduction sample shall be Lbat truck submitted for examination, inspectLon and test to deter- aine compli
9、ance with all provisions of this specification, The first truck produced under the terms of a contxact following notice of award may be submittied for approval as a preproduction sample, and apgroval shall be obtalned prior to fabrication of subsequent items. Fabrication of additional items prior to
10、 approval of the preproduction sample will be at contractoris risk and such additional items are subject to rejection in ehe event they fail to meet the requirements of this specifioation. Preproduction sample truck, when approved, will be used as a measurement guide for all trucks subsequently manu
11、factured in a given contract under this specification, and will be presented for inspection as the last unit for delivery under $he contract. Examination and testing, whereever practicable, will be conducted at the manufacturers plant, and delivery schsdule under the terms of manuacturerts contract
12、will automatically be extended in an amount equal to but not exceeding the time required for such testing and examination. Time is estimated at less than ten (10) days. 3.2 Materialq.-The materials selected shall be suitable for the purpose intended. Specifications and standards shall be in conforma
13、nce with NAVORD OSTD 599. 3 . 3 Cons t ruet ion , -= 3,3.1 Enaine.-The enghe shall be a six-cylinder heavy duty industrid in-line, vertical, four-cgde liquid cooled, internal combustion diesel operated engined, The cylinders and crank case shall be integrally cast with the liquid coolant jacket. The
14、 engine RPM at rated maximum through speed shall not exceed P -7 -3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the manufncturerrr recommended published continuous rating. Frotmztve device8 ahnlll be provided to prevent cranking the engine when t
15、ruck is in gear and prevent reversal of the engine under all conditions of operations. 3.3,1,1 -The engine shall be equippedwith an air intake ts facilitate otarting at low temperatwes. 3,3,2,2 -Accelerator control shall be installed for right fo0.t; operation, located to the right and free of inter
16、ference with braka pedal operation. duty oil clarifier confoWng .t;o Specification 1393. provided with a two-wire 12-volt starting system. Generator and reWlator.-A generator and regiilator shall lm provided to keep the battsry charge and to furnish current tor Ught and electrical accessories. 3.3,1
17、*3 3.3.2 Startlnpl and lightinn oquipment,-The truck shall bs 8.3.3 =-3che engine shall be provided with a special .reavy 3,3,3.l Goneratoz.-The generator shall be a two-brush type. Mctximm intermittent capacity aha11 be not lesa than 30 amperes md output charge to the battery shall start at an engi
18、ne speed not cpater than 800 RPM. be conveniently mounted ind shall be a three-unit type containing a circuit breaker, a voltage regulator and a current limiter. Th8 circuit breaker shall cios0 the circuit between the ganeratos and battery when the generator voltage riees above that sf the batter$,
19、and shall open the circuit when the genmator voltada falls below that of the battery. regulator 2mi.t; shall control the battery voltage to a maximum of 15.6 volts by generator field excitation modulation, i.0.# a vibrator-type of voltage regulator will be acceptable, but a step-remistor-typa will n
20、ot be acceptable. limiter ahal1 Limit the current output to that of the generator ratzng. 3.3.4 Start5m motsr,-!%e starting system shall conslst of a atari.ting solenoid relay switch operatod fmm the vehicle inatrumnt gmnel., a atartlng motor and heatty connecting cable. The 3tart;ing relay button,
21、when depressed, shall allow a starting solanold swivftch to close the circuit, supplying current to rotate the starting motor armature. Tho starter drive pinion shall srigaip th? flywheel ring gea? to rotate the engine with prupsr provision for automatic release when 3,3.3,2 Generator regulaLor.-The
22、 generator regulator shall The voltage The current; -4- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-Li237 39 m 7779706 0282006 I YIL-Ta7239 (BuOrd) the flywheel ring gear speed exceeds that of the pinion. Cranking torque shall be sufficient
23、 to rotate engine not less than 35 RPM a6 0%. or 100 RPM at 70oF., at the option of the contractor, for a period of not less than one minute when using reoommended lubricant in engine Battery temperature shall be $he same as for the engine in either test. 8.3.4.1 Starting rrrriteh.-The starting swit
24、ch shall be a solenoid plunger type connecting the starting motor to the battery. 3.8. LiEhtina system, battery and horn.- 3.3.5.1 StoplihtJ.-Two re8 stoplight of not less than 15 candle power shall be mounted on rear of truck. and wiring shall comply with the best accepted automotive practices and
25、be two-wire type. Stoplight shall be adequately recessed or guarded to protect it from possible injury. Stoplight shall operate automatically upon aetuation of service brakes; however, stoplight shall not operate when ignition switch is in “off“ position. Light, housing 3.3.51*1 Lights.-Each truck s
26、hall be equipped with two fixed headlights and two directionally controllable operational lights, one mounted forward and one rear. These lightis shall not be less than 32 candle power each. 3.3.5.2 Battery.-Battery shall be not less than 115 ampere- hour capacity measured at 20 hour rate and 80 deg
27、ree fahrenheit. Battery shall have rubber separators and, unless otherwise specified, shall be dry charged. Battery mountinq.-The battery shall be mounted rithin an enclosed acid-proof case with the mounting cover at least one-inch above the battery terminals. The cover shall be equipped with quick
28、release fasteners for ease of service and inspection. The case shall be so designed to positively protect against short circuit contact of battery leads and provi de adequate ventilation . Horn -0 -Truck shall be qgiUipped with an electric horn with push button mounted in center of steering wheel. T
29、ilt rings are not acceptableo tank, plunger type fuel pump, pintle type fuel nozzle, fue1 transfer pump built integral with the fuel pump, an efficient type nie1 strainer and a vamm type governor and an efficient oil bath type air cleaner. 3.8.5.2.1 3.3.5.3 3.3.6 Fuel system.-The uel system which co
30、nsists of a fuel It shall also include the _I- / -i _ -5- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-eleatrnl thammJ.ly atabilised remote indioating fuel gruge. !FMa gauge mat be mounted on the operatorb inistrutnent puring hose and fttinga. A d
31、rain cook, xOCat8d iln the baee of t he radiator or pmp inLet elbow, shalz be provided to drain ehe radiator and cylinder block. Cooliiag agalem with circulating pump ahnllt be of suffcent oapacty to prevent coohnt temperatura exceeding 2000 F. in an open Pigaeem, or 2200 F. in a pressurized cloaed
32、system when operating continuously under nomal operating conditiona in an rwobient temperature of 1200 P, For teaeing purpoirier and to wo2d the naoarssity of operation in a 1200 ounbienli, the dlffaren.t;Zal bstweea actual cmibLent aad 1200 F. wiI1 be appropriatay added or subtracted from coolant t
33、emperature when operating aith thermostat removed and using coo1an.t; temper- aturo reading taken at radiator expansion tank, indicating type temperature gauge shall. be mounted on the Snatrunient panal and inaccuracy shall not exceed PLUS or mirim 50 F. at 1800 F, Closed prerrsure syatemril shall b
34、e provided aith a positive operating vaouun breaker valve opening a% a presjura dilflerental not In excess of 2 pisi* nia6 rrpacifled by the contracting officer, truck shall be ahippad uLtb the entire coolant 8ystem drained. One tag marked nRadia.t;or Empty“ shall be affixed to the filler neck of th
35、e radiator and one 50 Lhe ateering wheel of the truck. A remota Unless oiiher- 3,ube ur honey-comb .t;ype core with expmrsion tank at Radiator shall be protected Where the tup of the radiator iL( lower top md sediment tank at bottom. by heavy grillwork, thm the top outlet of the engine a surge tank
36、may be used. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-T-17237 37 7777706 0282008 5 MIL-TLi723im in excess of 110 per cent of nominal governed speed and shall limit maximum speed of vehicle as shown in section 3.8.3. 3,8.9 Exhaust Ssstem.-E
37、xhaust manifold, exhaust pipe and wffler shall be so located, or provided with shields to prevent oil from ruptured hydraulic lines or lubricants from coming in contact with the exhaust system. The exhaust pipe shall be equipped with a spark arrester suitable to the Bureau of Ordnance. The exhaust s
38、ystem shall terminate up and to the rear of the vehicle. 3.3.10 Transmission.-The transmission shall be heavy duty selective type having not less than five speeds forward. Provisions for five speeds revdrse shall be made in the transfer case section 3.3,10.1. Each gear, shaft and axle shall be of hi
39、gh-grade hardened s%eel. except reverse idler shaft shall be supported on anti- friction bearings. All gears shall operate in oil or heavy lubricant and a standard pressure grease lubrication system shall be provided for all friction parts not lubricated from the normal transmission reservoir. All s
40、hafts arid axles except 3.3.10.1 Tranefer case.-The transfer case shall be heavy duky type and shall be provided with a shuttle gear for transferring the five transmission forward speeds to five speeds reverse motion. It shall also be provided with a means of disengaging the front axle. 3.3.11 Contr
41、ols.-All controls including gear ahift shall be provided with Eiuitable position marking either at oontrol lever or on a suitable diagram visible to operator. 3.3.11.1 Steering.-Steering shall be accomplished by a standard conventional steering gear, plus a power ,hydraulic Provided by IHSNot for Re
42、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-23239 39 9999906 0282004 7 XL-T-l7239(BuOrd) booitel+. worn and 8eotors cm levar or other suitable reduction devices twough Q hydraulic boost steering cylinder. Clochisa OP right hand rotation of steering wheel shall prov
43、ide tor r2Ght hand or clockwise turning of truck, while in forward motion. Provisions Por accurate precision adjustmsntt;s to compensate for wear of a1 major steering parta sa3.1 be made, Azsol provisions shall be made for lubricetion of all friction parts. The steering wheel shall turn the rear whe
44、ela by 3.3.11.2 Directional control.-Selective forward and re- verse operation shall be selected by a trmafer case shuttle gear controlled by an opepatorla ahuttle gear= lever. shall be conveniently located for right hand operation. control shall be at the right of the hoist control. The forks ehall
45、 elevate when th8 hoist lever is pulled backward and lower when the lever is pushed Sorwe.rd. shal2 bu accomplished by puaking the tilt lever forward, and backward tilt will be accomplished by pulling tilt lever back- rmd. Ml levers shall be self-centering and shall have round knobs. 3.3.11.3 H0is.t
46、; and tilt controls.-Hoist and tllt controls Tilt Forward tilt 33. 12 Hsdraulio aystem.-Tha hydrnulic system shall be It d88Pgmd to operate ut cylinder8 and all necessary hydraulic lines and fittin. vent being damaged by movable components of the truck. The flexible lines shall be ao located that th
47、ey are readily rrva2labla for inspection. rith flow resWictors to limit the rate of fall or collapse ofthe hydraulically operated component8 at a rate no greater than that nomall accomplished under. power in the event of line failure. A suitabe oil clarifier (in accordance with NAVPa O.S. 1383) and
48、an air filter shall be incorporated in ehe hydraulic systun to eliminate and reduce the entrance of foreign matterr U1 hydraulic lines shall be 80 located as to pre- Hydraulic lines shall be provided 3,3.12.1 Hydraulio utn-llhe hydraulic pumps shall be egge capable of delivering at least 30 CPld at
49、1000 pai at fbrO RPM. %o 25 gaZlon pumps shall be provided in order asaum operation in case of failure of one pump. Geare si conslat of high grade hardened steel suttably supported within Q housing having one inlet and one outlet port. 3.3,12,2 Gear Caser- aha gear case from which the 3 gear to ,al 1 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
