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Safety checklist

16th November 2006
Page 57
Page 57, 16th November 2006 — Safety checklist
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Which of the following most accurately describes the problem?


Apply tractor unit park brake.*

2 Apply the trailer's park brake (pull out the red button) Note: Under no cIrcumstances detach the red suzie. This will merely activate the trailer emergency feature and apply the service line. Any subsequent air leakage could let the brakes release, freeing the rig.

*All tractors that apply yellow line pressure to the trailE when parked, have a 'Test' position which allows the driver to Test' whether the vehicle is capable of parking, using just the tractive unit's spring brakes. Held in the Test position, the yellow service line exhausts and the trailer brakes release


1 Apply the units park brake.

2 Apply the trailer park brake (pull out red button).

3 Uncouple air lines and electrics.*

* If step 2 is neglected and air leaks away the service brakes could be slowly released, leaving the trailer free to roll.


1 Check that the trailer park brake is applied (pull out the red button).

2 After connecting the kingpin and fifth wheel, apply the unit's park brake.

3 Couple the air lines and electrics.

4 Release the trailer's park brake (push in the red button).

Note: Trailers are sometimes parked in very awkwarc sites, making lt difficult to access the park brake. It is possible in these circumstances to use the 'Shunt' button to move the trailer to a safe spot where the coupling procedure can be carried out properly.

In this case connect the fifth wheel, apply the shunt button and pull out slowly.

Stop when the vehicle is accessible and continue

oilfrom step 3 — but remember, the trailer is unbrakec when using the shunt button and a heavy load is relying on the tractor's brakes to stop. Remember also that simply disconnecting tho red air line will not mechanically park the trailer. It only applies the service brake using air pressure alone. If this leaks away, the trailer could be free to rnovi

Remember that both driver and employer are respon: ble for minimising the risk to themselves and others.


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