Operation
5.Backtractorsquarelyundertrailer,engagingfthwheel
jawsontrailerkingpin.Alwaysbackslowly,makingsure
trailerisneithertoohighnortoolow.Avoidbacking
undertrailerfromanangle.
6.Connectserviceandparkingbrakehosesandtrailer
lightconnector.RefertotheWarninglocatedinthe
Tractor-TrailerConnectionsinformation.Usea
three-pointstancewhenconnectinganddisconnecting
trailer.
7.Inspectfth-wheeljawstobesuretheyhaveclosedon
trailerkingpinandthetrailerplateisrestingsecurelyon
thefthwheel.
8.Besurethecouplerreleaseleverisinthelocked
position.
9.Chargetrailerbrakesystem.Settrailerbrakes,either
withthehandvalveortractorprotectionvalve.Pull
againsttrailerforanadditionalcheckofhook-up.Donot
pullhardenoughtodamageorstraintheequipment.
10.Settractorparkingbrakesandfullyraisetrailerlanding
gear.RefertoBrakessegmentofthissectionfor
OperationofParkingBrakesandTrailerBrakes.
11.Checkoperationofalltrailerlightsandcorrectfaulty
lights.
Un-Hook
1.Trytokeeptractorandtrailerinstraightline.
2.Applytractorandtrailerparkingbrakes.
3.Lowertrailerlandinggear,makingsureitisonsolid,
levelground.Theweightoftrailermustbeonlanding
gear.
4.Blocktrailerwheels.
5.Disconnectbrakehosesandlightcords.Besurehoses
andcordsareclear.
6.Pullcouplerreleaselevertodisengagefthwheeljaws.
7.Releasetractorparkingbrakes.
8.Pulloutfromtrailerslowly,allowinglandinggeartotake
loadgradually.
FifthWheelJawUnlockControl
YourvehiclemaybeequippedwithanoptionalFifth
WheelJawUnlockfeature.Aguardedswitchmounted
inthecaballowstheoperatortounlockthefthwheel
jawfrominsidethevehicle.Therearetwoavailable
versionsforthesystem,withmonitoringorwithout
monitoring.Theversionwithmonitoringcapabilities
includesadditionalindicatorstoshowthedriverfth
wheeljawstatus.
NOTE:FifthWheelJawUnlockisonlyoperationalwhen
vehicleisstationary,parkingbrakeisset,andignition
switchisintheRUNposition.
NOTE:Outside(roadside),mechanicaljawrelease
mechanismisstilloperableregardlessofin-cabcontrol.
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