Service manual

Belarus 80.1/80.2/82.1/82.2/82Р — Operation and Service Manual
Section 7. Maintenance Procedures
93
Draining Sediment and Replacing Fil-
ter Elements in the Fuel Fine Filter
Every 500 hours of diesel-engine opera-
tion (scheduled MS-2) drain sediment
from the fuel fine filter. To do this, un-
screw a plug (see Fig. 44) in the filter
housing and run the sediment until clear
fuel appears.
The filter element should be replaced
every 1000 hours of diesel-engine opera-
tion (scheduled MS-3). For this purpose
(see Fig. 45):
а) close the fuel tank cock;
b) drain fuel from the filter , отвернув
пробку (4);
c) unscrew nuts, remove lid (1) of the
filter, remove the filter element (2);
d) wash the lid and the inner space of
the filter;
e) install a new filter element and reas-
semble the filter;
е) open the fuel tank cock, fill up the
system with fuel, bleed air from the
duel system.
PRIMING THE FUEL SYSTEM AND
BLEEDING THE AIR
Open the fuel tank cock. Back off plug (3)
(see Fig. 46) on the fuel pump body and
the scavenging valve nipple (1) on the fuel
fine filter 1-2 turns. Using hand priming
pump (2), pump the system through, clos-
ing successively – until fuel free of air bub-
bles runs out – the plug on the fuel pump
body and the nipple on the fuel fine filter.
When air is driven out, screw in the hand
priming pump handle tightly.
CHECK AND ADJUSTMENT OF
NOZZLES
Every 2000 hours of diesel-engine op-
eration (scheduled MS-3) remove noz-
zles from the diesel-engine and have
them sent to a workshop for bench-
checking.
Fig. 44
Fig. 45
Fig. 46