Ingersoll Rand G330 Guía De Usuario Y Mantenimiento Manual página 95

Cleaning: (Engines 420–721)
• Close fuel stopcock.
• Place the fuel pan beneath the preli-
minary fuel filter.
• Remove drain plug 4 and drain off
fuel.
• Unscrew clamping screw 1, remove
filter housing 5 with filter insert 3.
• Clean sealing surface of the filter
bracket 7 and filter insert housing 5
of any dirt.
• Insert new sealing ring 6 and filter
insert 3 (change as necessary).
– Push the filter insert up to approx.
3 cm over the edge of the housing
onto the guide in the filter housing 5.
• Press filter housing 5 with filter insert
3 and sealing ring 6 against the filter
console 7 and screw into place with
clamping screw 1 (tightening torque
25 Nm).
Note: it must be possible to push the
upper seal 2 on filter insert 3 over
the guide bracket on filter console 7.
• Tighten drain plug 4.
• Open fuel stopcock.
• Check for leaks after the engine has
been started.
Changing
• Replace defective filter insert 3.
TD/TAD520/720
Fuel pre-filter. Drain water
(standard on 420–721)
The fuel pre-filter is an optional extra. Position a con-
tainer under the fuel filter. Drain off water and contami-
nants using the cock/plug at the bottom.
IMPORTANT! Wait a few hours after the engine
has been turned off before draining the filter.
Fuel pre-filter. Filter insert replacement
Close fuel cock at the fuel tank. Position a container
under the fuel filter.
Unscrew the screw (1) to remove the cover. Re-
place insert and reinstall cover. Open fuel cock.
Bleed fuel system. Take the old filter to a suitable
disposal point.
Start the engine and check for leaks.
NOTE! Engines 420–721 have a fuel pre-filter that is
possible to clean.
Fuel system Venting
The fuel system must be vented after fuel filters
have been replaced or after refilling the fuel tank af-
ter it has been run dry.
Venting engines with stop solenoid/fuel shut-off
valve connected to supply voltage at stop:
Ensure that the engine is in operational mode. Open
the bleed screw (1). Pump with hand pump (2) until
fuel containing no air flows out. Close screw while
fuel is flowing out.
Then pump a further 15–20 times. Check for leaks.
NOTE! For engines equipped with a fuel shut-off
valve, the fuel injection pump often requires venting
as well. This is done by slackening off the fuel injec-
tion pump pressure equaliser (3) (27 mm narrow U
wrench). Pump with hand pump (2) until fuel contain-
ing no air flows out.
Engines 420–721:
Open the air-venting plug in the overflow valve. (See
fig.) Crank the engine on the starter motor or use the
manual feedpump (optional equip.) until the fuel flow is
free from air. Close the plug while the fuel is still flow-
ing.
NOTE! Do not loosen the injectors delivery pipes.
Maintenance
35