12. Maintenance and upkeep
148
12.2 Hitch head
Coupling ball on base vehicle
Ensure that the tow ball meets the required dimensions and is unda-
maged, clean and free of grease. When using dacromet-coated (dull
silver anti-corrosion coating) as well as lacquered coup-ling balls, the
coating must be removed completely with sandpaper (200-240 grain)
so that it does not create deposits on the friction pads. The metal
surface of the tow ball must be bright. A damaged or dirty coupling
ball causes increased wear and tear on the friction pads; a greased
tow ball negates the stabilizing effect. Thinning solvents or spirit are
both suitable for cleaning.
1
Rules for greasing and oiling
• Movable parts such as pins and hinged parts on the hand brake
lever and deflexion lever of the ramp should be oiled lightly.
• Lightly grease the stationary parts on the case of the overrunning
equipment
j
after every 5,000 kilometres of driving.
• Check from time to time to ensure that the bearing surfaces of the
brake rod are not jammed.
• Clean and oil all movable and stationary parts regularly.
Greasing and oiling
Regularly examine and grease the sliding parts and stationary
parts of the chassis. If the caravan is used seldom, yearly mainte-
nance is required.
Rubber spring axles require no maintenance.
The axle(s) of the caravan is (are) fitted with compact
wheel bearings. The cylinder hub, compact bearings
and axle nuts form a closed unit. The compact bearings
are free of maintenance due to their special grease.
You can find further guidelines in the operating
instructions from the axle supplier.
For safety reasons, the spare parts for heating de-
vices must conform with the manufacturer's instruc-
tions. They must be installed by the manufacturer or an
authorised representative.
IMPORTANT: The friction pads of the WS 3000 safety
hitch may NEVER be oiled or greased.
Tension ball coupler
Keep the friction linings inside the stabiliser hitch clean and free of
grease (Fig. 5). When the friction pads are dirty, the surface can be
cleaned with 200-240 grain sandpaper. Then clean the surface with
a thinning solvent or spirit. All movable bearings and bolts are easy
to grease. By regular upkeep and maintenance of your WS 3000,
you increase its overall life span, function and safety.
Bearing surfaces on the casing of the over-
run coupling
Hitch head
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