Operation Manual

12. Maintenance and upkeep
112
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Changing the friction lining
It is very easy to exchange the friction pads
j
when they are
worn out. Messrs. Winterho oer a corresponding set of spare
parts. Please note the detailed instructions for assembly in the
manufacturer's spare part kit.
Noises
Certain noises can occur during the course of the drive; these
noises, however, have no inuence on the operative eectiveness
of the tension ball coupler.
Possible causes of these noises can be:
1. a dacromet-coated coupling ball on the base vehicle.
2. A galvanized or varnished coupling ball on the base vehicle.
3. A damaged, rusty or dirty coupling ball on the base vehicle.
4. dirty friction elements
j
on the tension ball coupler.
5. the towbar or tie rod in the linings of the overrunning equip
ment are running dry.
Hints
For 1., 2. and 3.:
Sand down the surfaces of the coupling ball and clean them with a
thinning solvent or spirit.
for 4:
Clean the surface of the friction elements with sandpaper (200-240
grain) and then clean with petroleum ether or spirit.
for 5:
Use a lubricating nipple to grease the linings. Pull back the shock
absorber and grease the bare towbar.
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12.3 Brakes
Initial inspection
The wheel brakes that have been installed are drum brakes that do
not adjust automatically. (Exception: Premium)
To ensure trouble-free brake performance, the wheel brakes must
be adjusted regularly.
The brakes must rst be inspected after you have driven 500 km
(including the Premium model). Have them inspected again after
every 10,000 km of driving, but at least once every year. Inspections
must be documented in the KNOTT service manual by the authorised
specialist who carries out the inspection. These documented reports
are just as much a prerequisite for any possible guarantee claims as
is the compliance with the regulations for maintenance and upkeep.
Friction pads
Diagram of friction pads