Zetor 3321 SUPER Operator's Manual page 15

TIRES AND WHEELS
Check the inflation air pressure of front
and rear tires. Inflate them up to the re-
commended pressure according to ope-
rating conditions.
Check bolt and nut tightening at
front and rear wheels
PREVENTIVE DAILY SERVICE
A 15
AIR CLEANER
Air cleaner is equipped with clogging in-
dicator located on the suction pipe. The
indicator is visible after side shield re-
moval. If the air filter clogging, clean the
cleaner and fix the correct function of
indicator by the following way: push the
push-button on the indicator body (2a)
you will mechanically release the indica-
tor lock of read field indicating clogging.
Indicator is again working (2b).
A 16
CAB FILTRATION
Check and eventually clean cab filters
located under the roof in front part.
Filters are accessible after removing of
grills.
Filter exchange interval depends upon
dustiness of working condition. Partial
regeneration of filters can be done by
shaking-out or blowing by press air.
A 17