Operation
Uncoupling the Semi-tanker
2018-9015-008
01. July 2018
76 / 162
6.13 Uncoupling the Semi-tanker
6.13.1 STEP 1: Area inspection
Attention!
Risk of damage!
Improper alignment between the truck and the semi-tanker can cause
damages to the supports legs when pulling out at an angle.
● Place the semi-tanker on a flat and level surface which can support the
semi-tanker weight;
● Verify that the uncoupling area is level and debris-free;
● Ensure that the truck is perfectly aligned to the semi-tanker.
6.13.2 STEP 2: Air pressure release
Note
Applying the truck brakes while pushing against the semi-tanker kingpin
allows holding the rig with pressure off the locking jaws.
Note
When lowering the landing gears of the semi-tanker, do not lift the
semi-tanker in order to make easier the fifth wheel unlatching and make
easier the next coupling.
● Shut off the semi-tanker air supply to lock the braking system;
● Release pressure on the fifth wheel jaws by gently moving the truck backward;
● Apply the truck parking brakes while pushing against the semi-tanker kingpin;
● Lower the semi-tanker landing gears until they firmly contact the ground;
● Turn the crank a few turns to remove weight from the truck but do not lift the
semi-tanker yet.
6.13.3 STEP 3: Air lines disconnection
● Disconnect the air lines from the semi-tanker;
● Connect the air lines to the dummy connectors at the rear of the truck cab;
● Support air lines to prevent damage and wear.
6.13.4 STEP 4: Electrical cable disconnection
● Disconnect the electrical cable from the semi-tanker;
● Hang the electrical cable on the support with plug downward to prevent moisture
from entering the plug;
● Support the cable to prevent damage and wear;
● Install the outlet protectors.
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