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2 Operation
2.5
To check the locking mechanism
►
2.6
To disconnect a semi-trailer
►
Park the vehicle on flat, firm ground
►
Secure the semi-trailer to prevent its rolling away
►
Extend the landing gear as described in the operating manual until the
fifth wheel coupling has almost no strain on it
►
Disconnect the supply lines
►
Open the fifth wheel coupling (see section 2.3)
►
Drive the tractor unit out from under the semi-trailer
►
The fifth wheel coupling is automatically ready for engagement again
2.7
To connect a semi-trailer with directional axle
The catch (1) must be down as shown.
The skid plate must rest on the
fifth wheel coupling without a
gap.
►
To connect a fifth wheel coupling with
semi-trailer that use directional axle,
observes the angle of the wedge,
that must be of 40° in agreement with
DIN 74085. If this angle will not be
respected, can appear cracks and
until breaking the fifth wheel plate.
3 Servicing and testing
3.1
Servicing instructions
The skid plate on the semi-trailer that engages with the fifth wheel coupling
must meet the following conditions to provide a long service life and trouble-
free function:
►
Max. 2 mm unevenness
►
Adequate reinforcement must be assured
►
Smooth and groove-free surface if possible, without weld bumps
(smooth existing groove burr)
►
Rounded or chamfered front and side edges
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Complete coverage of the fifth wheel coupling support area
Effective lubrication of the top of the fifth wheel plate (apart from
on the W version), the locking mechanism, the pivot bearing
(only the A and D versions) and the king pin (before using for
the first time and after cleaning) is essential to ensure their long
service life. In the W version, we recommend applying a thin
coat of grease to the skid plate.
Note
When you clean the fifth wheel coupling you may produce waste products that
contains pollutant substances. We would like to point out that you must comply
with the various national waste regulations for the disposal of these waste
products.
3.2
Fifth wheel coupling with manual lubrication
►
At short intervals, at the latest every 5,000 km:
►
Disconnect the semi-trailer
►
Clean the fifth wheel coupling and the skid plate
►
Grease the fifth wheel plate, locking parts and king pin
►
Grease specification: Extreme pressure grease (EP) with MoS2 or
graphite additive (e.g. Collgranit A3 paste)
►
In addition, every 10,000 km
grease the locking mechanism –
with a trailer attached – using
the grease nipple (1) on the
edge of the fifth wheel coupling
plate.
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