Special maintenance
After each 2000 hours of opera-
tion
Action 53. Checking the diesel engine
injectors
IMPORTANT! The injectors shall be
cleaned and adjusted in a dealer’s special -
ized worksh o p .
WARNING: Diesel fuel is injected under
high pressure and can be a source of se-
rious injuries, if the injector atomization is
checked by hand. Use a piece of paper
or cardboard for this purpose. Put on pro-
tective goggles. Prior to connection or
disconnection of fuel lines, stop the en-
gine to take pressure down. Prior to start-
ing the engine, tighten all connections of
fuel lines. In case of fuel injection on the
hand skin, immediately apply for medical
aid, otherwise blood poisoning is possi -
ble.
NOTE: It is convenient to have a spare
set of injectors verified and adjusted for
quick installation into the engine.
Take the injectors out and replace them.
To do this, proceed as follows:
• Prior to disconnection or loosening
of any fuel system parts, clean fully
the adjacent working surfaces.
• Turn out the nuts (4) and disconnect
the high-pressure fuel piping (5) from
the injectors (3) and fuel pump.
• Remove the fuel piping.
• Turn out four bolts (1) of the drain
line and take the rundown fuel pip-
ing (2) away. Discard copper seal-
ing washers (two washers per each
“banjo” bolt).
• Unscrew the bolts (6) fastening the in-
jectors and remove the injectors (3).
• Send the injectors for servicing to
dealers workshop.
• Install the verified, cleaned and ad-
justed injectors by performing the
above specified step in the reverse
order.
• Remove air from the system.
IMPORTANT! During each injector in-
stallation, use new copper washers.
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