5-6 BA 50Z3/6003 en – Edition 4.3 * * 5003b510.fm
Maintenance
Bleed the fuel system in the following cases:
• After removing and fitting the fuel filter, prefilter or the fuel lines back on again
• After running the fuel tank empty
• After running the engine again, after it has been out of service for a longer period of
time.
☞ Bleed the fuel system as follows:
• Raise the control lever base.
• Remove the ignition key.
• Fill up the fuel tank.
• Turn the ignition key to the first position.
• Wait about 5 minutes while the fuel system bleeds itself automatically.
• Start the engine.
➥ If the engine runs smoothly for a while and then stops, or if it does not run smoothly:
• Stop the engine.
• Raise the control lever base.
• Remove the ignition key.
• Bleed the fuel system again as described above.
• Check for leaks after starting the engine.
• Have this checked by authorized personnel if necessary.
Fuel prefilter with water separator
Draining the fuel/water mixture:
☞ Stop the engine.
☞ Turn ball-type cock B to the OFF mark.
➥ Fuel supply is interrupted.
Check the water separator:
☞ Prepare a suitable container for collecting the fuel/water mixture.
☞ Stop the engine.
☞ Switch off ignition.
☞ Remove the ignition key.
☞ Raise the control lever base.
☞ If the red indicator ring rises to position C.
☞ Place a suitable container under the fuel prefilter to collect the fuel/water mixture as it
drains.
☞ Unscrew thread A.
➥ Fuel/water mixture drains.
➥ Wait until the indicator ring returns to the bottom of the water separator.
☞ Screw thread A back on again.
☞ Turn ball-type cock B to the ON mark.
➥ Fuel supply is open again.
Thread A is fitted with a hose. Collect the fuel/water mixture as it drains with a
suitable container and dispose of it in an environmentally friendly manner.
Fig. 258: Fuel prefilter
A
B
C
On
Off
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