Belarus 80.1 Operation Manual page 295

6.4.2.12 Operation 21. Cleaning of filter cartridges of the filter for cab ventilation and
heating system
To clean the filter for cab ventilation and heating system, do the following:
- lift the cab roof 1 (Figure 6.4.14).
- undo two fastening bolts and remove the filter cover 2 together with two filter cartridges 3.
- slightly shake the components to remove free dust particles from the filter; be careful
not to damage the filter.
- clean filters with compressed air under pressure of max 0.2 MPa. Keep the hose head
at a distance of min. 300 mm from the filter in order not to damage the paper filtering cartridge.
Direct an air flow through the filter in the direction that is opposite the regular air flow, which is
indicated with arrows marked on the filter.
- re-install the filter by performing operations in reverse order, and close the cab roof.
Figure 6.4.14 – Cleaning of filter for cab ventilation and heating system
ATTENTION: DO NOT SWITCH ON THE FAN BEFORE CLEANING THE FILTERS AT
HIGH HUMIDITY OF THE ENVIRONMENT, FOR EXAMPLE IN THE MORNING, AS IT IS
DIFFICULT TO REMOVE MOISTURE PARTICLES FROM FILTER CARTRIDGE!
ATTENTION: DURING TRACTOR OPERATION IN HEAVY DUSTING CONDI-
TIONS, CLEAN THE FILTER EVERY 8-10 HOURS OF OPERATION, I.E. ON A SHIFT
BASIS!
6.4.2.13 Operation 22. Check/adjustment of tension of fan drive belt for engine cooling
system
Fan belt tension is considered normal if the deflection of its branch "engine crankshaft pul-
ley — alternator pulley" as per figure 6.4.15 is within the range 15...22 mm for engine D-243 (D-
243С) when pressing it with the force of 40 N.
To adjust belt tension, loosen the alternator fastening. Adjust the belt tension by turning the
alternator body. Tighten the bolt fastening the plate and nuts of bolts fastening the alternator.
1 – cab roof; 2 – filter cover; 3 – filter cartridge.
Figure 6.4.15 – Check of fan belt tension
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80-0000010B OM