#Kingpin locking jaws manual

NOTE: For no-tilt fifth wheels used with rigid upper couplers, always remove no-tilt shaft assembly for on-road use.ġ. Remove the wheel chocks and continue with the pre-trip inspection. Fully retract the landing gear legs off the ground and secure the crank handle.ġ8. WARNING: Failure to repair a malfunctioning fifth wheel before use could result in tractor-trailer separation which, if not avoided, could result in death or serious injury.ġ7. IMPORTANT: DO NOT use any fifth wheel that fails to operate properly. WARNING: Failure to properly couple the tractor and trailer could result in tractor-trailer separation while in use which, if not avoided, could result in death or serious injury. Refer to the fifth wheel manufacturer’s instructions. If you do not achieve a proper couple, repeat the coupling procedure. (6.35 mm) or less gap visible between the lock jaws.ġ6. Fifth wheel locks must be closed around the trailer kingpin with 1/4 inch No gap is permissible between the trailer upper coupler plate and the fifth wheel.Ĭ. Nut and washer must be snug against the fifth wheel casting.ī.

Exit the cab and visually inspect for the following to ensure that the lock is closed.Ī. Perform a pull test as an initial check by locking the trailer brakes and pulling forward with the tractor to make sure that tractor-trailer separation does not occur.ġ5. Raise the landing gear legs until the pads are just above the ground.ġ3. Slowly back into the trailer, engaging kingpin in the fifth wheel.ġ1. IMPORTANT: Never inﬂate the tractor suspension when the kingpin is above the throat of the ﬁfth wheel.ĬAUTION: Failure to avoid inflating tractor suspension when the fifth wheel is not forward of the king pin, could result in damage to the kingpin and ﬁfth wheel.ġ0. WARNING: Failure to couple with the trailer at the proper height could result in improper coupling, allowing tractor and trailer separation, which if not avoided, could result in death or serious injury. IMPORTANT: If trailer is too high, the kingpin will not properly connect with the lock jaw. If fifth wheel does not make contact with the upper coupler plate, use the landing gear to lower the trailer until fifth wheel makes contact. The fifth wheel plate face MUST make contact with the upper coupler plate and raise the trailer. Adjust tractor suspension to ride height. Exit cab and verify proper fifth wheel to kingpin alignment.ĩ. Stop when fifth wheel is under the leading edge of the trailer.Ĩ. Slowly back up, using lowest gear possible. NOTE: For proper operation of landing gear, follow the landing gear manufacturer’s instructions.ħ. If trailer is too low, use landing gear to raise the trailer height. Exit the cab and make sure the fifth wheel is below the upper coupler plate. Completely exhaust air from tractor suspension, ensuring that the fifth wheel is below the contact surface of trailer.Ħ. Set tractor parking brake and place into neutral.ĥ. STOP the tractor before making contact with the trailer.Ĥ. Traveling in a straight line, slowly back tractor to trailer. Position the tractor so the center of the fifth wheel is aligned with the kingpin.ģ. If either above conditions do not exist, repeats Steps 4 – 6.Ģ. The movement of the kingpin into the fifth wheel jaws will allow them to open and successfully couple. If both of these conditions exist, the fifth wheel will still be able to be coupled even though the lock jaws appear closed. Release handle is in extended “open” position.ħ. Specifically for the Holland FW35 Model – Shaft adjustment nut and washer are away from front of wheel.ī. If locks are not completely open, check the following:Ī. Visually inspect fifth wheel throat to ensure locks are completely open and ready to accept kingpin.Ħ. Air Release: Set the tractor parking brake and pull the fifth wheel release valve until locking mechanism opens and locks in place. Pull the release handle completely out.ī.

#Kingpin locking jaws manual

Manual Release: If equipped with a manual secondary lock, first pull secondary release handle and hook on casting.