MTZ 1220.3 - Page 191

MTZ 1220.1/1220.3 K. Scheduled technical maintenance
K11
Оperation 12. Servicing air purifier
«Donaldson»
Use clogging indicator to control clog-
ging of filtering elements of the air purifier.
With excessive clogging an alarm lamp on
instrument panel lights.
Make service of the air purifier in the fol-
lowing order:
• Remove the right-side grid from the
front section and lining to get access to
the air purifier;
• Pull latch (1) (yellow color), turn cover
(2) anti clockwise by 12.5° and take it off;
• Take off main filtering element (MFE) (3);
• Check if control filtering element (CFE)
is stained, without pulling it out of casing;
ATTENTION! Removing the monitor fil-
ter element from the casing is not rec-
ommended.
Contamination of the monitor filter ele-
ment indicates that the BFE is damaged
(the paper shutter broken, the bottoms
unstuck). In such a case, rinse the MFE
and replace the BFE.
• blow off main filtering element with
compressed air, first from inside, then
from outside until dust is fully removed. To
avoid breakage of paper shutter air pres-
sure should not exceed 0.2-0.3 MPa (2-3
kgf/cm
2
).