ABC
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CDL Pre-Trip Inspection Checklist - Class A
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EngineSimple memorization hack for your CDL exam and regular inspections:
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Brakes• BBC - Is any plastic or metal Bent, Broken, or Cracked?
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Lights• CDL - No hard materials should be Cracked, Damaged or Loose.
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Wheels• ABC - Are there any Abrasions, Bulges, or Cuts on the rubber?
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Steer Axle / Rear Suspension• PFL - Peak For Leaks in fluid and air containers.
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Side and Rear of Cab• PMS - Are bolts Properly Mounted and Secure?
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Driver Shaft / Rear Frame
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5th Wheel
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Trailer Front / Side / Rear - Trailer Suspension
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Gauges / Inner Truck
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EngineCheck
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HosesAll hoses should be secured on both ends with no splits or cuts.
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FluidsEngine oil, washer fluid, coolants, and power steering.
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BeltsNo more than 1/2"" to 3/4"" of give, securely mounted with no fraying ends.
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AlternatorSecurely mounted, belt in good shape.
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Water PumpProperly mounted with no split or leaking hoses.
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Air CompressorSecurely mounted, no visible or audible leaks.
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BrakesCheck
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Brake Pads¼ minimum brake pad thickness.
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Slack Adjuster1” of play and at a 90' angle to the brake chamber.
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Brake ChamberNo audible leaks or visible damage.
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Brake HoseSecurely mounted, no audible leaks, splits, or cuts.
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Brake DrumNo bluing from excessive heat, securely mounted.
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LightsCheck
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Truck Lights
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FrontClearance lights, headlights, high beams, turn signals, flashers.
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SidesTurn signals, flashers, clearance lights.
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RearTail lights, brake lights, left turn, right turn, 4-way flashers.
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Trailer Lights
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FrontClearance lights.
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SidesTurn signals, flashers, clearance lights.
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RearClearance lights, tail lights, license plate lights, brake lights, turn signals, flashers.
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Reflector TapeClear, free of dirt.
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WheelsCheck
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Wheel InsideNot broken, no illegal welds.
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Wheel OutsideNo cracks or illegal welds.
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TiresNo cuts or bulges, air gauge matches manufacturer spec, tread depth at least 4/32" and evenly worn.
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SpacingDuals are properly spaced.
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Valve StemNot audibly leaking. metal cap in place and secure.
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Lug NutsPresent, tight, no cracks.
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Hub SealNot cracked or loose.
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Steer Axle / Rear SuspensionCheck
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Steering ShaftNot BBC, securely mounted.
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Steering Gear BoxNot BBC, securely mounted, no visible leaks.
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HoseNo visible leaks, properly mounted.
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Pitman ArmNot BBC, securely mounted, nuts and pins are all hardware is present and secure.
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Drag LinkRubber is in good shape, bushings are properly greased and not split or cut.
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Upper / Lower Control Arms and Tie RodNot BBC, securely mounted.
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Spring MountsNot BBC, securely mounted.
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Leaf SpringsNot BBC, securely mounted, not shifted or scissored.
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U-boltsNot BBC, securely mounted, all accounted for.
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Shock AbsorberNot BBC, securely mounted, no visible leaks, rubber bushings aren't dry rotting.
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Side and Rear of CabCheck
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MirrorsMirrors adjusted properly and without cracks, free of dirt.
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Foot PedalsUnobstructed.
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HornsFunctioning properly.
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WindshieldNo stickers, cracks, or excessive dirt.
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Heater / DefrostBoth operate when the fan is set to max.
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WipersArms move properly when turned on, and wiper fluid works.
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StepsMounted and secured.
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DEF CapSecured.
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Fuel CapGasket and vent in place, chain secures cap to the tank.
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SkirtingNo damage, panels secure.
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Driver Shaft / Rear FrameCheck
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FrameNo illegal welds, not BBC, no rust.
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Drive ShaftNot BBC, properly mounted, not twisted, and the U-joints are clean.
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Universal JointNot BBC.
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DifferentialNo leaks.
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5th WheelCheck
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Bolts / BracketAll accounted for and secure, not broken or bent.
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Locking PinsAll accounted for and secure, not broken or bent.
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Release HandleReleases freely and is in the locked position.
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ApronNo cracks, no gap between apron and 5th wheel plate, securely fastened.
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Skid PlateNo cracks, properly greased, securely mounted.
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PlatformSecurely mounted, not cracked or broken, no illegal welds.
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Kingpin / Locking JawsLocking jaws are wrapped around kingpin, which is straight with no chips or welds.
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Air LinesSecurely mounted at both ends. Lines are free of cuts, no audible leaks.
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Electrical LineSecured at both ends. Lines are free of cuts, no audible leaks.
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Trailer Front / Side / Rear - Trailer SuspensionCheck
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Trailer - Front
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Header BoardProperly mounted and secured, not BBC, no missing rivets.
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Clearance LightsNot loose, cracked, or dirty.
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Top RailNo cracks or collision damage.
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Trailer - Side
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Rivets, HolesNo holes, all rivets in place.
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Landing GearProperly mounted and secured, not BBC, shoes are present, handle moves freely.
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DOT TapeCovers at least 50%, not dirty or peeling.
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FloorNo holes.
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Cross MembersNone are damaged, missing, or twisting.
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Tandem ReleaseProperly mounted and secured, not BBC.
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Slide RailProperly mounted and secured, not BBC.
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PinsEngaged.
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Trailer - Rear
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Clearance LightsNot cracked or dirty.
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DoorsNot broken, no holes, seal intact.
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HingesSecurely mounted, not BBC.
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Door Handles and RodsSecurely mounted, functioning properly.
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LightsSecurely mounted, not cracked or dirty.