Knowledge

Tow hitch

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89: 243: 29: 629: 100: 1735: 494: 513: 1755: 620: 485: 1745: 476:, step plates, and snowplows. It also allows a driver to maneuver a trailer with better visibility into a parking site. Front trailer hitches are mounted directly to the frame of a vehicle to ensure a reliable connection. Front hitches are typically equipped with standard-sized receiver tubes to accommodate a variety of removable aftermarket hitch mounted accessories. 449: 604:. At high speeds, trailer sway can become dangerous. Most vehicle manufacturers will only allow a maximum trailer capacity of 5,000 pounds (2,300 kg) and 500 pounds (230 kg) of tongue weight without using a weight-distributing hitch. Tow vehicles often have square receiver sockets to accept weight distributing hitches. 599:
A weight-distributing hitch is a "load leveling" hitch. It is a hitch setup mounted on the tow vehicle that uses spring bars and chains under tension to distribute part of the trailer's hitch weight from the towing vehicle's rear axle to the towing vehicle's front axle and to the trailer's axle(s).
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Outside North America, the vehicle mounting for the tow ball is called the tow bracket. The mounting points for all recent passenger vehicles are defined by the vehicle manufacturer and the tow-bracket manufacturer must use these mount points and prove the efficacy of their bracket for each vehicle
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Trailer hitch balls come in various sizes depending on the load they carry and the country of operation, with removable types consisting of a bolt/shank to attach to the ball mount. The trailer tongue (North America) or coupling (outside North America) slips over a trailer hitch ball attached to a
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can accommodate a variety of different tow hitches when the tow hook/ball may be attached via a receiver tube attached to the tow vehicle. Trailer hitch receiver tubes may be bolted, welded, or integral to the vehicle chassis, and come in various sizes depending on the load they are designed to
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The clearance between the lunette and pintle allows for more relative motion between the trailer and tow vehicle than a ball coupling does. A disadvantage of that is the "slam" transmitted into the towing vehicle with each push/pull load reversal. This becomes a tradeoff between a more secure
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inch (1.6 mm) larger than the ball bolt/shank diameter. The ball mount must match the SAE hitch class. The ballmount for a receiver-type hitch is a square bar that fits into a receiver attached to the vehicle. Removable ball mounts are offered with a varying rise or drop to accommodate
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There are two main categories of ISO tow ball: the flange fitting and the swan-neck which has an extended neck fitting into the tow-bracket. Swan-neck tow balls are often removable to avoid the inconvenience of a tow ball protruding from the vehicle when not required. Some manufacturers are
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Coupling ball of Class A . (Tow ball 50 mm ). Dimension according to regulation No 55 of the Economic Commission for Europe of the United Nations (UNECE) — Uniform provisions concerning the approval of mechanical coupling components of combinations of vehicles , ANNEX 5, Figure
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Bumper/fixed-drawbar type hitches typically are built as one piece, have an integrated hole (sometimes more than one hole on pickup trucks) for the trailer ball mount, and are generally not compatible with aftermarket hitch-mounted accessories.
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A larger, heavy-duty gooseneck ball size: 3 in (76.2 mm) is typically used for towing greater than 10,000 pounds (4.5 t), and this towing capacity falls outside of the scope of SAE J684 trailer hitch classes.
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Front trailer hitches are also used on pickup trucks, full-size SUVs, and RVs for multiple purposes. A front-mounted hitch can accommodate additional truck equipment such as front mount bike carriers, fishing/hunting gear,
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Weight ratings for both bumper-mounted and frame-mounted receiver hitches can be found on the bumper of pickup trucks (for bumper-mounted tow balls) and on the receiver hitch (for frame-mounted receiver hitches).
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Trailer hitches for conventional passenger cars, light-duty commercial vehicles, light trucks, and multipurpose passenger vehicles come in two main OEM or aftermarket types: receiver and bumper/fixed-drawbar.
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To tow safely, the correct combination of vehicle and trailer must be combined with correct loading horizontally and vertically on the tow ball. Advice should be heeded (see references) to avoid problems.
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Receiver-type hitches consist of a portion with a rearward-facing opening that accepts removable aftermarket hitch-mounted accessories: trailer hitch ball mounts, hitch bike racks, cargo carriers, etc.
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developed the trailer hitch with a ball head and socket joint. Franz Knöbel patented the ball head-socket joint trailer hitch invention on March 14, 1934. Westfalia holds a number of towing patents.
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An advantage of the gooseneck hitch is its tighter turning radius, which helps when towing a big flatbed or car hauler. Gooseneck hitches also enable use of the entire truck bed when not towing.
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mounts in the middle of the truck bed. This hitch is designed to be paired with a gooseneck trailer, which can manage heavier loads than a hitch at the back of the tow vehicle.
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A trailer hitch typically bolts to the chassis of the vehicle. In North America, there are a few common trailer hitch classes (I, II, III, and IV) that are defined by the
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hook on the tow vehicle. A pintle hook and lunette ring make a more secure coupling, desirable on rough terrain, compared to ball-type
549:. In Sweden, around 2.2 million cars of around 4.3 million (just over 50%) have tow balls. In the United Kingdom the popularity of 1141: 937: 909: 1006: 856: 541:
Across Europe around 25% of vehicles have tow balls fitted—but there are distinct regional variations, being more common in
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Before 1932, all trailers used only jaw or hook couplings with an eyelet for trailer towing. In 1932, Franz Knöbel, of
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Some manufacturers market Class V hitches, but there was no such standard listed in the 2014 version of SAE J684.
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Outside of North America, the ISO standard tow ball that has been adopted in most of the world is 50 mm (
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Class IV receiver for up to 10,000-pound (4.5 t) towing capacity with wiring connector on the left side
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It can help reduce trailer sway and hop. Trailer hop can jerk the tow vehicle. Trailer sway is also called
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variants are standardised at the regional or national and local levels. Some variants are defined by the
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Trailer coupled (i.e., "hooked") onto a ball-type tow hitch and electrical connector plugged in
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94/20/EC requirements and fitted to vehicles first registered on or after 1 August 1998.
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nose gear. It can take the form of a tow ball to allow swiveling and articulation of a
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hitches. It is commonly seen in towing applications in agriculture, industry, and the
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hitches. These are used for agriculture, industry, and large recreational trailers.
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Class IV – up to 10,000 pounds (4,500 kg) – larger loads (campers, boats, etc.)
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Class III – up to 5,000 pounds (2,300 kg) – larger loads (campers, boats, etc.)
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For flat deck and pickup trucks towing 10,000-to-30,000-pound (4.5 to 13.6 t)
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A pintle hook (top) and lunette ring (bottom), used in towing applications by the
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variations in the height of the vehicle and trailer to provide for level towing.
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A lunette ring is a type of trailer hitch that works in combination with a
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The trailer hitch ball attaches to a ball mount; with a diameter typically
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A car can be equipped with a trailer tow hitch with a removable tow ball.
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Class III and IV: 2 in (50.8 mm) heavy duty receiver tube
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Heavy trailer mounted on a gooseneck hitch inside pickup truck bed
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The vehicle must also be electrically connected to the trailer.
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Hard attachment point on a road vehicle, used to tow a trailer
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carry and the country of operation. The US standards are:
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Class II – up to 3,500 pounds (1,600 kg) – light loads
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Class I – up to 2,000 pounds (910 kg) – light loads
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A screw-on tow hook mounted at the front of a vehicle
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For the song, see 251:receiver hitch mount or integral with the hitch. 1771: 538:introducing retractable tow balls as an option. 246:Operation of tow ball with trailer hitch mounted 956:"Directive 94/20/EC of the European Parliament" 785:"A Mover's Guide to Trailers & Tow Hitches" 607: 1032:"Släpvagnskörning med B-körkort (SOU 2007:33)" 56:in North America) is a device attached to the 1135: 1110:Directive 94/20/EC of the European Parliament 932: 930: 233: in (50.8 or 63.5 mm) receiver tube 960:Official Journal of the European Communities 594: 851: 849: 847: 92:Under bumper class III receiver hitch with 32:A tow ball mounted on the rear of a vehicle 1142: 1128: 927: 561:) vehicles being fitted with tow hitches. 553:is responsible for a large proportion of 516:Tow hook mounted on the rear of a vehicle 505:, tow hitches must be a type approved by 907: 844: 782: 511: 492: 483: 447: 259:Typical North American hitch ball sizes 241: 98: 87: 35: 27: 564: 1772: 185: 83: 1149: 1123: 908:Benjamin, Scott C. (8 October 2008). 76:used on military vehicles worldwide. 1744: 1081: 783:Campbell, Julia (9 September 2019). 718:ISO standards for trailer connectors 586: 581:ISO standards for trailer connectors 1717:Vehicle identification number (VIN) 437:>10,000 lb (4,540 kg) 13: 663: 14: 1791: 1103: 857:"US Department of Transportation" 443: 1753: 1743: 1734: 1733: 1160:Part of a series of articles on 910:"How Front-mount Receivers Work" 889:. SAE International. 30 May 2014 627: 618: 107: 1063: 1049: 1024: 999: 944:. EU, UNECE ANNEX 5, Figure 2. 426:10,000 lb (4,540 kg) 381:10,000 lb (4,540 kg) 158:Society of Automotive Engineers 151: 974: 948: 901: 879: 819: 802: 776: 405:6,000 lb (2,720 kg) 360:6,000 lb (2,720 kg) 339:6,000 lb (2,720 kg) 331:3,500 lb (1,590 kg) 132: 1: 1551:Approach and departure angles 982:"ISO - 43.040.70 - Couplings" 769: 237: 94:7-pin blade trailer connector 1075:www.westfalia-automotive.com 938:"Tow ball 50mm - EU class A" 703:Electronic stability control 608:Pintle hook and lunette ring 311:2,000 lb (907 kg) 303:2,000 lb (907 kg) 7: 1614:Automotive light bulb types 690: 10: 1798: 678: 568: 18: 1729: 1692: 1654: 1604: 1593: 1543: 1470: 1410: 1362: 1341: 1178: 1169: 1157: 713:Fifth Wheel and Gooseneck 595:Weight-distributing hitch 479: 466:fifth wheel and gooseneck 434:2 in (50.8 mm) 431:3 in (76.2 mm) 402:1 in (25.4 mm) 385: 336:1 in (25.4 mm) 316:2 in (50.8 mm) 315: 308:1 in (25.4 mm) 274: 269: 266: 263: 1634:high-intensity discharge 748:Trailer brake controller 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tow hitch 577:Trailer connector 571:Trailer connector 441: 440: 60:of a vehicle for 1787: 1757: 1747: 1746: 1737: 1736: 1684:Window deflector 1667:Side-view mirror 1602: 1601: 1225:Continental tire 1188:Backbone chassis 1176: 1175: 1144: 1137: 1130: 1121: 1120: 1097: 1096: 1085: 1079: 1078: 1067: 1061: 1060: 1053: 1047: 1046: 1044: 1042: 1036: 1028: 1022: 1021: 1019: 1017: 1003: 997: 996: 994: 992: 978: 972: 971: 969: 967: 952: 946: 945: 934: 925: 924: 922: 920: 905: 899: 898: 896: 894: 883: 877: 876: 874: 872: 861:Federal Register 853: 842: 841: 839: 837: 823: 817: 816: 814: 806: 800: 799: 797: 795: 780: 631: 622: 555:four-wheel drive 533: 532: 528: 525: 422: 421: 417: 414: 398: 397: 393: 390: 377: 376: 372: 369: 356: 355: 351: 348: 327: 326: 322: 299: 298: 294: 287: 286: 282: 279: 261: 257: 232: 231: 227: 224: 212: 211: 207: 204: 199:Class I and II: 146: 145: 141: 1797: 1796: 1790: 1789: 1788: 1786: 1785: 1784: 1770: 1769: 1768: 1763: 1721: 1688: 1650: 1598: 1596: 1585: 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Index

Trailer Hitch


chassis
towing
aircraft
trailer
pintle

7-pin blade trailer connector

fatigue test
Society of Automotive Engineers


trailers
fifth wheel and gooseneck
winches


European Union
European Union directive

Benelux
Scandinavia
caravans
four-wheel drive
SUV
Trailer connector
Trailer connector

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