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2022PRODUCT CATALOGYour only source for NO-SLACK technology We make it EASYwww.fifthwheel.com
No-Slack Technology Fontaine Fifth Wheel No-Slack The world’s only self-adjusting fifth wheel lockPull handle is theeasiest to operatein the industry–nocomplicated openingsequence to rememberSteel constructionwith a larger surfacecontact area forgreater strengthand stabilityBuilt insecondary lockNo-Slack lock isself-adjusting to giveyou a snug, secureconnectionLocking triggerhelps minimizehigh-hitching toreduce tractor, trailerand tire damageClean Connect reducesfriction between thetop plate and the trailerplate (available on7000CC series)Optional in-cab airrelease* only openswhen the parkingbrake is set.*For new truck builds, Fontaine supplies an air cylinder in the fifth wheel. All other components for in-cab airrelease are supplied and installed by the truck OEM. For retrofitting standard release models, contact your Fontainesales representative.For weight savings topplates, mounts andassemblies, look forthis symbol.2NewInnovationFor new innovativeFontaine Fifth Wheelproducts look forthis symbol800-874-9780 www.fifthwheel.com
Part Number IdentificationThis guide explains the nomenclature for Fontaine Fifth Wheelcomplete assembly part numbers.SL6NWB675012See example part number at right:ReleaseSL Side leftAA Air actuatedAL Auto-lube leftTop plate model6 No-Slack 60007 No-Slack 7000C 7000CC CleanConnectH7 No-Slack H7Mounting Bracket modelNWB Light weightoutboard slideBSL Stationarybracket mountPML Adjustableplate mountLWB Light weightslide bracketMounting height6750 6-3/4"Actual height fromtruck frame to topof fifth wheel.Examples:7125 7-1/8"7250 7-1/4"8375 8-3/8"9750 9-3/4"Slide travel12 12" slideSliding fifthwheels only.Examples:12 12" slide24 24" slide36 36" slide48 48" slideNo-Tilt Capable ModelsHDS No-tilt ready* outboard slideNHDS No-tilt outboard slideHDI No-tilt ready* inboard slideNHDI No-tilt inboard slidePMH No-tilt ready* stationary plateNPMH No-tilt stationary platePMX No-tilt ready* stationary plateNPMX No-tilt stationary plate*You can convert HDS, HDI, PMH and PMX to no-tilt witheasy install KIT-NO-TILT.Measurements & Serial Number LocationHow do I measure a fifth wheel?How do I find the serial numberASerial number engraved directly into the right side offifth wheel skirt. Note: position 5 and 6 of the serialnumber indicates the year built. Serial number isalways 9 digits.XThe installed height of all Fontaine models is measuredfrom the top of the truck frame to the top of the fifth wheel.For standard models dimension “A” is a part of the modelnumber. For example, if dimension “A” in this diagram is7.25 inches, it would appear in the model number as 7250(Example: SL7LWB725024).No-Slack right side viewserial number location800-874-9780 www.fifthwheel.com3
No-Slack Top Plate Options No-Slack 6000 seriesUp to 95,000 lbs gross combination weight (GCW) if used on an NWBUp to 115,000 lbs gross combination weight (GCW) PML, LWB50,000 lbs vertical loadThe Fontaine 6000 Series pressed steel fifth wheel cuts weight without cuttingperformance or load rating. The proven design was made possible by FiniteElement Analysis technology and strategic placement of high strength alloy steel.This lighter 6000 Series No-Slack fifth wheel combined with NWB mountingbracket is approximately 60 lbs lighter with no reduction in load ratings. The 6000features the same legendary No-Slack locking technology. Lock automaticallyself-adjusts to the trailer kingpin for a smoother ride, lower maintenance costs andlonger component life. The 6000 series is rated for standard to moderate dutyon-highway use only, including tankers. Some restrictions may apply please seeLT-076 application guide on website for details.No-Slack 7000 seriesUp to 115,000 lbs gross combination weight (GCW) if used on an PML or LWBUp to 140,000 lbs gross combination weight (GCW) PMH, PMX, HDI or HDS55,000 lbs vertical loadThe 7000 series offers all the benefits of our 6000 series, but in a castdesign rather than pressed steel. It features the self-adjusting No-Slack locking mechanism.Some restrictions may apply please see LT-076application guide on website for details. The 7000 is also available onthe new no-tilt fifth wheel assemblies to accommodate framelessdump applications.No-Slack 7000CC series Clean Connect Up to 115,000 lbs gross combination weight (GCW) if used on an PML or LWB55,000 lbs vertical loadThe 7000CC series Clean-Connect offers all the benefits of the 7000series fifth wheels plus the added benefit of a grease free top plate surface.With Clean-Connect technology the fifth wheel no longer requires greaseto lubricate between the top plate surface and the trailer coupling plate.This eliminates the labor costs, materials and downtime associated withgreasing the top plate surface. Some restrictions may apply please see LT-076application guide on website for details.No-Slack H7 Heavy Duty SeriesUp to 180,000 lbs gross combination weight (GCW) if used on PMH, PMX, HDI or HDS70,000 lbs vertical loadThe H7 Series offers all the benefits of No-Slack technology in a steelreinforced cast housing. This rugged workhorse is rated for standardto severe duty applications with a Gross Combination Weight (GCW) thatcan exceed 140,000 lbs. (63,500 kgs). Some restrictions may apply pleasesee LT-076 application guide on website for details. The H7 is available onthe new no-tilt fifth wheel assemblies to accommodate frameless dumpapplications.4800-874-9780 www.fifthwheel.com
Fifth Wheel Assembly OptionsAir ActuatedFontaine’s air actuated No-Slack fifth wheels openwith a release valve located on the dash.(6000/7000/7000CC)Specify “AA”Air actuatedmodels includean air cylinderSlide StopsOptional inserts tolimit forward slidetravel.Consult FontaineFifth WheelNo-Tilt Fifth WheelsClean ConnectClean Connect insert pads act as a lubricantbetween the top plate surface and the trailer couplingplate without using any grease! Now you can loweroperating cost because the grease and the labor toapply the grease at every couple is nolonger necessary. Clean Connectalso improves steer tirewear. (7000CC).Specify “SLC TopPlate”Clean Connect padsdo not require greaseFontaine SmartConnect HDS, HDI, PMH or PMX mounts can be convertedto no-tilt fifth wheels by ordering easy to install kit(part number KIT-NO-TILT). No-Tilt can also beordered with kit already installed see heavy/severeduty section of catalog.Special Stationary Mount ModelsComing Soon!Fontaine SmartConnect isan information system that willgive you the data you needto make better fifth wheeloperating and maintenancedecisions at a fleet level. Thesystem informs the driverabout the current fifth wheellock status while upcomingsoftware upgrades will add even greater functionalityincluding: Predictive maintenance modeling and telematicssupport (let’s you know when to adjust or rebuild yourfifth wheel) Add-on sensors for kingpin monitoring and trailerposition Autonomous truck operation system supportBSLFMA-D64FMAHScan code or search "oem" atfifthwheel.com and choose“Specialty stationary mounts”System upgrades will integrate seamlessly with this firstgeneration. High-end components are employed forgreater reliability and durability, and the system is loadedwith useful features and benefits to help your fleet runmore efficiently. Contact Fontaine for order information.800-874-9780 www.fifthwheel.com5
Important Application NotesTop plate selection notes: For No-Slack features see page 2. For fifth wheel topplate selection guide see page 4. Air activated releasestyles are available on select models. Mount selection notes: A sliding mount gives the owner more options. You cantransfer weight between tractor axles, handle trailers withdifferent kingpin settings, and vary vehicle combinationlengths. A sliding mount fifth wheel also providesadditional maneuverability, accommodates trailers withshort landing gear clearance and allows the driver toextend the unit for maximum comfort when weightallows. If you choose a sliding mount, Fontaine offers awide selection of slide lengths.Stationary mount fifth wheels (plate or angle mounts) arean option and are ideal for applications where the trailerkingpin setting, axle loading and vehicle length all remainthe same for the entire fleet. Stationary mount fifth wheelsare usually lighter than sliding mount fifth wheels.Important application notes: If any single restriction factor within your application issurpassed within a given duty level, the next duty levelmust be selected. For more information on standard, moderate and severeduty, please review the duty class restrictions onpage 7. When selecting a fifth wheel, if the application or vehicleusage places the maximum capacity on a certain fifthwheel, then the selection of a fifth wheel with a highercapacity is advised. For example, a tractor that is at amaximum vertical load of 50,000 lbs in a moderate dutyapplication should be using a fifth wheel with a verticalload capacity of 55,000 lbs or greater. This additionalcapacity should give better service life over a longerperiod of time.Special applications: All logging, mining and oil field applications areconsidered severe duty. Do not select assemblies in thestandard or moderate levels when a special application isdesignated.!!!Minimum static load warning: Minimum static load warning!!! The trailer that is attachedto the fifth wheel should impose a consistent verticalload. Repeated negative loading (trying to pull the fifthwheel off of the brackets with the kingpin) is not allowed.A minimum static load applied to the fifth wheel throughthe trailer is 10% of the gross trailer weight. See the loadrating for the specific fifth wheel for maximum verticalload values.Van trailersTankers and bulk trailersFlatbeds, stretch and stake trailersLowbed trailersFramed end and framelessdump trailersImportant: Contact your OEM or Fontaine Fifth Wheel for more information on the right fifth wheelfor your application. Please refer to the Fontaine Fifth Wheel warranty statement for importantwarranty information. Selecting assemblies in conflict with this application guide without priorwritten approval from Fontaine engineering voids all warranties. For more information about dutyclass restrictions and applications see LT-076: Application guide at fifthwheel.com in the Literaturesection. LT-001: Instruction manual is also available in the Literature section.6800-874-9780 www.fifthwheel.com
Duty Class RestrictionsWith the Fontaine Fifth Wheel complete productline you can easily select the perfect fifth wheel foryour application. We offer top plates and mountingoptions in a wide variety of sizes to handle even themost demanding applications.To specify the right fifth wheel for your applicationtwo factors must be considered: load capacity andservice conditions.“Weight” refers to the amount of weight that afifth wheel can handle. “Road type” refers to theoperating environment and the type of equipmentused in an application. “Travel type” refers tomileage between stops.You don’t choose a top plate based on “weight”only. Consider service conditions because a heavyload pulled on a paved road places less stress ona fifth wheel than a lighter load pulled in severe offhighway conditions.The duty class restriction chart at right andNo-Slack top plate options chart (page 4) can beused as a guide to help you select the right fifthwheel.Fontaine has an application guide (LT-076) that canbe obtained at: www.fifthwheel.com(Choose “Support” and then “Spec My Truck”).If you need further assistance contact Fontaine FifthWheel at: 800-874-9780.Standard DutyWeight:Road type:Travel type:Axlelimitation:Less than 95,000 lbs (43,000 kgs) grosscombination weight (GCW)100% on-highway application onmaintained concrete or asphalt roadsMore than 30 miles between each coupleMaximum number of towed axles equals 3Moderate DutyWeight:Road type:Travel type:Axlelimitation:Less than 115,000 lbs (52,000 kgs) grosscombination weight (GCW)Less than 10% off-highway application onmaintained concrete, asphalt, gravel orcrushed rock roadsNo minimum mileage between couplesMaximum number of towed axles equals 4Heavy DutyWeight:Road type:Travel type:Axlelimitation:Less than 140,000 lbs. (63,500 kg.)gross combination weight (GCW)"Less than 10% off-highway application onmaintained concrete, asphalt, gravel orcrushed rock roadsNo minimum mileage between couples.No axle limitationsSevere DutyOn-line selection guide isavailable. Scan code or go to:www.fifthwheel.comChoose “Support” then choose“Spec My Truck”Weight:Road type:Travel type:Axlelimitation:More than 115,000 lbs (52,000 kgs)gross combination weight (GCW)Any off-highway application on all roadtypes including non-maintained roadsNo minimum mileage between couplesNo axle limitationsSpecialapplications:All logging, mining and oil field applicationsfall into this category regardless ofanticipated weight, road type or number ofaxles800-874-9780 www.fifthwheel.com7
Standard Duty Air Slide AssembliesNo-Slack 6000Light Weight Air SlideNo-Slack 6000 NWB Slide50,000 pounds vertical loadPart 5024SL6NWB875012SL6NWB875024Fifth 4"12"24"Weight372 lbs393 lbs378 lbs399 lbs383 lbs404 lbsOptions Air actuated (replace SL with AA): add 5 lbsFeatures Innovative weight saving design makes the NWBthe lightest steel slide system available – helps fleetsoffset heavy emission system components 40-70 lbs lighter than competitive slide systems Improved fuel economy and low up-charge makethe NWB very attractive to weight-sensitive, costconscious fleets Computer-aided design features a smaller footprint with steelreinforcement for strength and durability New greaseless bracket liner provides consistent lubrication,reduces wear (no metal-to-metal contact) and cutsmaintenance costs Dual durometer two-piece bushing for improved shockabsorption and easier maintenanceStandard/Moderate Duty Plate Mount AssembliesAdjustable Plate MountNo-Slack 6000, 7000 & 7000CC PML600070007000CC50,000 pounds 55,000 pounds 55,000 poundsvertical loadvertical loadvertical load6000 PMLPart ML10250Features Two-inch adjustment increments give you greaterversatility for improved payload distribution7000 PMLPart Number(Add 39 102507000CC PMLPart Number(Add 42 4"6000Weight279 lbs286 lbs294 lbs299 lbs325 lbsOptions (See pages 5) Air actuated (replace SL with AA): add 5 lbs Auto-lube left (replace SL with AL) Auto-lube models aredrilled and tapped for lube system (7000/7000CC) Computer design technology cuts excess weightwithout sacrificing one pound of capacity New greaseless bracket liner gives you consistentlubrication, reduces wear (no metal-to-metal contact)and cuts maintenance costs Computer designed cast bracket for lighter weight andgreater strength Dual durometer two-piece bushing for improvedshock absorption and better support Brackets are welded to a 3/8" steel plate that has six boltholes on each side8800-874-9780 www.fifthwheel.com
Air SlideNo-Slack 6000, 7000 & 7000CC LWBStandard/Moderate DutyAir Slide Assemblies600070007000CC Clean50,000 pounds 55,000 poundsConnectvertical loadvertical load 55,000 poundsvertical load7000LWB7000CCLWBFifth Slide 60006000 LWBPart NumberPart Number Wheel LengthPart NumberWeight(Add 36 lbs)(Add 39 lbs)HeightFeatures Innovative weight saving design is lighterthan its predecessor without losing an ounceof capacity! Save 20 to 50 lbs depending onconfiguration Computer-aided design features a smallerfootprint with steel reinforcement for strengthand durability New greaseless bracket liner providesconsistent lubrication, reduces wear(no metal-to-metal contact) and cutsmaintenance costs Two-inch slide increments give you greaterversatility for improved payload distribution Quad-Lock four-point locking systemincreases locking surface area for greaterstability and improved wear 36"48"12"16"24"36"48"12"16"24"36"48"402 lbs416 lbs422 lbs450 lbs472 lbs405 lbs419 lbs425 lbs453 lbs475 lbs410 lbs424 lbs430 lbs458 lbs480 lbs415 lbs429 lbs435 lbs463 lbs485 lbs420 lbs434 lbs440 lbs468 lbs490 lbsOptions (see page 5) Air actuated (replace SL with AA): add 5 lbs Auto-lube left (replace SL with AL) Auto-lube models are drilledand tapped for lube system (7000/7000CC) Automatically removes slack from the slideassembly for a smoother ride and longer life Dual durometer two-piece bushing forimproved shock absorption and easiermaintenance800-874-9780 www.fifthwheel.com9
Easy install no-tilt kits availableAdding Part Number: KIT-NO-TILTto HDS, HDI, PMH or PMX mountsconverts the fifth wheel to No-Tilt.Easy to install . in minutes!Introducing No-TiltThe fifth wheel that thinksit’s a convertible.Remember the days when you hassled with all kinds of awkward, dirty,heavy and frustrating contraptions to engage/disengage a no-tilt fifthwheel? Well, those days are gone.Forever. The new line of Fontaine New Fontaine Heavy-Duty/Severe-Duty Fifth Wheel Mountsheavy/severe-duty fifth wheelsModel Descriptionfeatures an integrated designNumberconcept to handle no-tiltHeavy/Severe-Duty SlideHDSapplications with ease.Outboard mountAll you need is a 7000 or H7Series No-Slack top platecombined with one of our fullyassembled no-tilt mounts. Oryou can convert any of our newheavy/severe-duty fifth wheelsto no-tilt by bolting on the no-tiltaftermarket kit (See photo below).Easy to operate–Simplydisengage four stops toswitch from a no-tilt to arocking fifth wheel. Quick.Easy. NO TOOLS.NHDSNo-Tilt Heavy/Severe-DutySlide Outboard mountHDIHeavy/Severe-Duty SlideInboard angle mountNHDINo-Tilt Heavy/Severe-DutySlide Inboard angle mountPMHPlate Mount Heavy/SevereDuty 37 1/4" bolt centersNPMHNo-Tilt Plate Mount Heavy/Severe-Duty 37 1/4" centersPMXPlate Mount Heavy/SevereDuty 38" bolt centersNPMXNo-Tilt Plate Mount Heavy/Severe-Duty 38" bolt centersKIT-NO-TILT.Built to take it–These robust fifth wheels handle the toughestloads with improved stability on the road and at the job site.Convertible design–Adding Fontaine Part Number: KIT-NO-TILTto an HDS, HDI, PMH or PMX mount converts the fifth wheel to aNo-Tilt (N) model. Example: convert the Heavy-Duty Slide (HDS) toNo-Tilt Heavy-Duty Slide (NHDS) by simply bolting on the kit.Add flexibility to your fleet with these durable, convertible fifthwheel mounts–perfect for frameless dump applications.Heavy/Severe-DutyNo-Slack top platesthat get it done!7000 SeriesHeavy-Duty55,000 lbs vertical loadUp to 140,000 lbs GCWH7 Series10Heavy/Severe-Duty70,000 lbs vertical loadUp to 180,000 lbs GCWFor more information contact yourFontaine representative or visitwww.fifthwheel.com800-874-9780 www.fifthwheel.com
FONTAINE ADVANCED DESIGNNO-TILT FIFTH WHEELSBuilt tough and easy to operateAll four No-Tilt stops areshown in the “up” or engagedposition to prevent the fifthwheel from rockingSimply disengage the fourstops to switch from a No-Tiltto a rocking fifth wheel. Quick.Easy. NO TOOLS.NHDS Sliding fifthwheel mount shownwith No-Tilt engagedAll four No-Tilt stops are shownin the “down” or disengagedposition to allow the fifth wheel torock back and forthNPMH Stationary fifthwheel mount shown withNo-Tilt disengaged800-874-9780 www.fifthwheel.com11
Heavy/Severe-DutyAir Slide AssembliesAir SlideNo-Slack 7000/H7 HDSHeavy/Severe-Duty Slide Outboard MountsNewInnovation700055,000 lbs vertical loadH770,000 lbs vertical loadUp to 140,000 lbs (63,5000 kgs)gross combination weight (GCW)Up to 180,000 lbs (81,000 kgs)gross combination weight (GCW)7000 HDSPart NumberNO-TILT option for framedump applications–simplyflip the four levers on themount to block the fifthwheel from rockingFeatures New adjustable tilt/no-tilt slideassemblies Replaces Fontaine AWB slidingassemblies Easy to operate–Simply disengagefour stops to switch from a no-tilt to arocking fifth wheel. Quick. Easy. NOTOOLS. Built to take it–These robust fifthwheels handle the toughest loads withimproved stability on the road and atthe job site. Add flexibility to your fleet with thesedurable, convertible fifth wheelmounts–perfect for standard andframeless dump 1000072H7 HDSPart Number(Add 70 DS900072SLH7HDS1000072No-Tilt: To order with no-tilt hardware installed add N after plate code.Example: SL7NHDS800012. No-tilt hardware adds 8 lbs to assembly.Aftermarket No-Tilt Kit. HDS mountscan be converted to no-tilt fifthwheels by ordering easy to installkit (part number KIT-NO-TILT). Samekit works for HDS, HDI, PMH orPMX mounts. An air cylinder drives a mechanicallinkage to release the slide lockingwedgesNo-tilt mount kits are not availablefor 7" height fifth wheels.Scan for no-tilt brochure12FifthSlide7000Wheel "9"63510"645800-874-9780 www.fifthwheel.com
Heavy/Severe-DutyAir Slide AssembliesAir SlideNo-Slack 7000/H7 HDIHeavy/Severe-Duty Slide Inboard Angle MountsNewInnovation700055,000 lbs vertical loadH770,000 lbs vertical loadUp to 140,000 lbs (52,000 kgs)gross combination weight (GCW)Up to 180,000 lbs (52,000 kgs)gross combination weight (GCW)7000 HDIPart NumberNO-TILT option for framedump applications–simplyflip the four levers on themount to block the fifthwheel from rockingFeatures New adjustable tilt/no-tilt slideassemblies Easy to operate–Simply disengagefour stops to switch from a no-tilt to arocking fifth wheel. Quick. Easy. NOTOOLS. Built to take it–These robust fifthwheels handle the toughest loads withimproved stability on the road and atthe job 8H7 HDI PartNumber(Add 70 48SLH7HDI1050048FifthSlide7000Wheel 64048"9-1/2"64910-1/2659No-Tilt: To order with no-tilt hardware installed add N after plate code.Example: SL7NHDI850012. No-tilt hardware adds 8 lbs to assembly.Aftermarket No-Tilt Kit. HDI mountscan be converted to no-tilt fifthwheels by ordering easy to installkit (part number KIT-NO-TILT). Samekit works for HDS, HDI, PMH orPMX mounts. To order without no-tilt design Add flexibility to your fleet with thesedurable, convertible fifth wheelmounts–perfect for standard andframeless dump applications.No-tilt mount kits are not availablefor 7" height fifth wheels. An air cylinder drives a mechanicallinkage to release the slide lockingwedges800-874-9780 www.fifthwheel.com13
Adjustable Stationary MountsNo-Slack 7000/H7 PMH & PMXHeavy/Severe-Duty Stationary MountsNewInnovationHeavy/Severe-DutyStationary Mount AssembliesPMH (39-1/2" wide plate)7000H7Up to 140,000 lbs (63,5000 kgs) Up to 180,000 lbs (81,000 kgs)gross combination weight (GCW) gross combination weight (GCW)55,000 pounds vertical load7000 PMHPart NumberNO-TILT option for framedump applications–simplyflip the four levers on themount to block the fifthwheel from rockingFeatures New adjustable stationary tilt/no-tiltmount assemblies Easy to operate–Simply disengagefour stops to switch from a no-tilt to arocking fifth wheel. Quick. Easy. NOTOOLS. Built to take it–These robust fifthwheels handle the toughest loads withimproved stability on the road and atthe job site. Add flexibility to your fleet with thesedurable, convertible fifth wheelmounts–perfect for standard andframeless dump applications. Choice of two popular bolt patternsavailable; PMH and PMX.SL7PMH7500SL7PMH8500SL7PMH950070,000 pounds vertical loadH7 PMHPart Number(Add 70 Wheel CentersWeightHeight7-1/2"387 lbs8-1/2" 37-1/4" 396 lbs9-1/2"406 lbsNo-Tilt: To order with no-tilt hardware installed add N after plate code.Example: SL7NPMH7500. No-tilt hardware adds 8 lbs to assembly.PMH mounts can be converted to no-tilt fifth wheels in the field.See aftermarket kit photo and description below.PMX (40-1/2" wide plate)7000H7Up to 140,000 lbs (63,5000 kgs) Up to 180,000 lbs (81,000 kgs)gross combination weight (GCW) gross combination weight (GCW)55,000 pounds vertical load7000 PMXPart NumberSL7PMX7500SL7PMX8500SL7PMX950070,000 pounds vertical loadH7 PMXPart Number(Add 70 Wheel CentersWeightHeight7-1/2"394 lbs8-1/2"38"399 lbs9-1/2"409 lbsNo-Tilt: To order with no-tilt hardware installed add N after plate code.Example: SL7NPMX7500. No-tilt hardware adds 8 lbs to assembly.Aftermarket No-Tilt Kit.PMH and PMX mounts can beconverted to no-tilt fifth wheelsby ordering easy to install kit (partnumber KIT-NO-TILT). Same kitworks for HDS, HDI, PMH or PMXmounts.14800-874-9780 www.fifthwheel.com
Helpful InformationWhat is the warranty coverage?Fontaine’s warranty is for five years covering parts for materialand workmanship. There are a few exceptions. See our existingwarranty statement or call us at 800-874-9780 for moreinformation. Warranty document is at www.fifthwheel.com(Choose "Support" and then "Warranty).What is the recommended maintenance procedure?Recommended maintenance is at least every 90 days or50,000 miles. All recommended practices are located in theFifth Wheel Handbook supplied with every unit shipped or maybe obtained at www.fifthwheel.com (Choose "Support" andthen "Helpful information" LT-001 Instruction Handbook).What if my fifth wheel is hard to open?Make sure a pre-service lubrication has been completedbefore unit is put in service. Make sure the driver is backingtight against the trailer after setting the trailer brakes. This willreduce any tension or pressure on the locking jaw and wedge.DO NOT dump chassis air bags before uncoupling fromtrailer. Make sure the wedge-stop rod is properly set to therecommended gap. Make sure the truck and trailer are notin a bind or twist (No daylight between top plate and trailerplate). Check for any lower mount obstructions or interferenceunderneath the wheel. Check for damage to the fifth wheel.How can I tell if my fifth wheel is properly locked?Verify secure coupling with a “tug test”, by easingthe tractor forward, with the trailer brakes on, to feelresistance of the load. Set the parking brakes onthe tractor and trailer and get out of the tractor andvisually inspect, using a flashlight, that the fifth wheelis properly closed.IMPORTANT: Improperly coupled fifth wheel mayin some circumstances be able to pass a “tugtest”. A visual inspection is always required.The locking jaw and wedge must be fully acrossthe throat of the fifth wheel, there must be nogap between the fifth wheel and the trailer plate,and the pull handle must be within 1” or lessfrom the skirt of the fifth wheel. All three areasof the fifth wheel must be inspected to ensurethat the fifth wheel is properly coupled.Below are three critical areas of visualinspection that drivers must perform after everycouple.KingpinCan I change the height of my fifth wheel?Changing fifth wheel height can be as simple as changingthe brackets. It all depends on the type of application, styleof fifth wheel and the type of existing base. These factors willdetermine just how high or low you can go.WedgeFifth wheel throatHow much wear is allowed for a kingpin?According to SAE J2228 - Kingpin Wear Limits, if the uppershoulder which is 2.875" new or the smaller 2" diameter isworn more than .125 (1/8)" the kingpin should be replaced.Locking jawand wedgemust be fullyacross thethroat of thefifth wheel.No gapbetweentrailerbottom andfifth wheel.Does Fontaine provide a kingpin tool?Yes! Go to "www.fifthwheel.com/wtb" to find out where youcan purchase the No-S
wheel, then the selection of a fifth wheel with a higher capacity is advised. For example, a tractor that is at a maximum vertical load of 50,000 lbs in a moderate duty application should be using a fifth wheel with a vertical load capacity of 55,000 lbs or greater. This additional capacity should give better service life over a longer
