should not exceed a value of 1.4lbs./sq. in.
When changing wheels round they should no
be switched diagonally, but from front to rear
and vice-versa, simultaneously at left and
right (figure No. 42).
Among the periodical maintenance items
figures also the care of the air cleaner. This
filter is of the dry element pattern and should
be cleaned every 4000 miles. To do this
disengage the rubber hose clip on carburetor
by means of a screwdriver and push rubber
tube away from carburetor (figure 43, left).
Next loosen the toggle-action clips on filter.
For this purpose grip the air-cleaner body and
snap back the toggle-action clips. Then clean
the filter by dropping same several times on a
wooden block in order to expel the dust
(figure 43, right).
The filter element should be replaced every
7500 miles (see Service C). To carry out this
replacement slacken the fixing screw with a 9
mm spanner, remove cleaning element and fit
a new element (figure 44).
The transmission of movement from clutch
pedal to clutch unit, from accelerator pedal to
carburetor, and from air lever to carburetor
takes place by means of Bowden cables.
These Bowden cables should also be
checked from time to time and lubricated, if
necessary. These jobs, however, are best
done by a BMW Service Station. They should
be performed at intervals of about once a
year, i.e. every 7500 miles, as indicated in the
maintenance chart, and therefore belong to
the maintenance items of Service C (page 29
and appendix).
Finally there is a further maintenance job
which should be carried out every 7500 miles
(also see lubrication chart on last page). The
grease loads in the ball bearings diminish at a
very slow rate, so that the grease in the front
wheel bearings must be renewed from time to
time, only. For this purpose remove the wheel
cover plates and with a clean finger press
clean
20
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