Class E (Truck) -4- Coupling, Uncoupling - Level 3

3 of 3 Levels

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

You notice that the upper coupler plate of a semi-trailer shows visible damage. How should you behave?

I report the defect to my supervisor at the company

I grind down cracks with polishing paste

I electrically weld visible cracks and then grind down the excess

I immediately arrange for the upper coupler plate to be replaced

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

How does severe wear of the kingpin of a semi-trailer manifest itself?

The trailer can become unstable during driving

Damage to the fifth wheel coupling can occur

The trailer can detach from the towing vehicle during driving

Damage to the mounting plate or frame of the tractor unit can occur due to unusually strong impacts

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

Which components of a fifth wheel coupling must be checked for wear?

The safety latch on the pull handle

The thickness of the wear ring above the locking hook

The thickness of the locking hook

The thickness of the sliding plates on the top of the coupling plate

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

The fifth wheel coupling on your tractor unit is designed for low maintenance with sliding plates on the top of the coupling plate. It is connected to a central lubrication system. What do you pay attention to?

Every 10,000 km driven, I lubricate the locking hook and locking bolt of the fifth wheel coupling via the grease nipple attached to the side edge of the coupling plate. No trailer may be coupled for this

I follow the instructions in the operating manual of the fifth wheel coupling

Every 10,000 km driven, I grease the locking hook and locking bolt of the fifth wheel coupling via the grease nipple attached to the side edge of the coupling plate. A trailer must be coupled for this

Every 50,000 km driven, I clean the bottom of the coupling plate and grease the guide of the pull handle of the fifth wheel coupling

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

I heavily grease the top of the coupling plate

I grease the parts of the fifth wheel coupling according to the specifications in the operating manual of the fifth wheel coupling

I replace the sliding plates when they are worn down to the top of the mounting screws

I clean the top of the coupling plate according to the specifications in the operating manual of the fifth wheel coupling

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

You are checking components of a fifth wheel coupling for wear. How do you know when the wear ring above the locking hook or the locking hook itself must be replaced?

When the fifth wheel coupling can no longer be locked manually

When noises are heard during uncoupling

I follow the instructions for this in the operating manual of the fifth wheel coupling

When noises are heard during coupling

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

What checks should you perform on the upper coupler plate of a semi-trailer?

Whether the upper coupler plate is adequately lubricated

Whether the upper coupler plate is flat

Whether the upper coupler plate shows visible damage

Whether the upper coupler plate is clean and grease-free

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 3

How can you determine that the kingpin of a semi-trailer is worn?

When the kingpin has become too thick

When strong impacts occur transverse to the direction of travel

When unusually strong impacts occur in the direction of travel

When the kingpin has become too thin

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Class E (Truck) -4- Coupling, Uncoupling – Level 3