Interlock Handle
The fifth wheel is only correctly locked when the inside notch in the
handle is hidden under the fifth wheel and the handle plunger is
correctly positioned in the locking slot under the fifth wheel (see
Figure 6).
CAUTION
If the handle does not close fully by itself (see Figure 5 and
Figure 6) the complete coupling procedure must be
repeated.
Only when you have confirmed that the handle is correctly closed
either:-
1. Carry out a “pull test” - try to pull the tractor forward against the
trailer brakes firstly making sure that the trailer brakes are on.
or
2. Visually check that the lockbar is fully across and that the kingpin
is locked inside the mechanism (See Figure 7).
CAUTION
Failure to check that the handle is closed correctly before
carrying out the “pull test” may result in damage to the fifth
wheel.
3000 Fifth Wheel Instruction Manual
6
O P E R A T I O N
English
Figure 6 - Locking of a fifth wheel with an Interlock handle
Figure 7- Visually inspect kingpin is locked
