Krone Profi Liner - Page 122

ROAD OPERATIONS
122
Operating instructions • Semitrailer • 505369471-04 • 02/2019
NOTE
Material damage due to improper coup-
ling and uncoupling
Improper coupling and uncoupling can
cause damage to the vehicle.
► Prior to coupling and uncoupling, use
the landing leg winches to adjust the
trailer to the required coupling or un-
coupling height of the tractor unit.
► When coupling or uncoupling, also
observe the instructions from the
tractor's operating instructions.
► Ensure sufficient clearance of all com-
ponents.
1
2
3
Fig.7-1: Coupling
1 Semitrailer plate
2 Kingpin
3 Semitrailer coupling
Coupling
► Before coupling, check:
○ Is the tractor unit's coupling load suit-
able for the trailer?
○ Do the semitrailer coupling and the
kingpin match?
○ Does the coupling height of the tractor
and trailer correspond?
○ Is the trailer correctly loaded?
○ Is the coupling plate sufficiently lubric-
ated?
► Apply the parking brake on the trailer
(see "5.8.2 Parking brake", pg.40).
► Use the wheel chocks to prevent the
trailer from rolling away (see "5.1 Using
wheel chocks", pg.24).
► Check the attachment and wear of the
kingpin.
► Set the height of the semitrailer coup-
ling using the tractor unit's air suspen-
sion. The coupling plate must be ap-
prox. 50 mm higher than the coupling
plate.
► Prepare and unlock the semitrailer
coupling on the tractor unit.
► Drive the tractor unit toward the centre
until it is approx. 30cm away from the
kingpin.
► Raise the tractor unit's air suspension
until the coupling plate and the
semitrailer plate touch. Do not raise
the semitrailer in doing so!
► Continue to drive the tractor centrally
until the lock engages with the
semitrailer coupling.
► Put the tractor unit's air suspension in
the driving position.
► Perform the start-up test in low gear.
► Apply the parking brake on the tractor
unit.
► Perform a visual inspection:
○ The semitrailer plate must lie against
the semitrailer coupling without an air
gap.
○ The semitrailer coupling must have
locked properly.
► Secure the semitrailer coupling with its
securing device.
► Connect the supply and control lines
(see "5.6 Supply and control connections",
pg.35).
► Retract the landing leg winches (see
"5.2 Landing leg winches", pg.25).
► Put the trailer's air suspension in the
driving position (see "5.9 Air suspension",
pg.43).