SHB 28Z3 EN – Edition 2.0 * 28z3s312.fm 3-15
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:
• Fold the control lever base up
• Remove the ignition key
• Fill 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
• Fold the control lever base up
• Remove the ignition key
• Bleed the fuel system again as described above
• Check for leaks after starting the engine
Water separator
Check the water separator as follows:
☞ Collect the fuel/water mixture in a suitable container.
☞ Stop the engine
☞ Switch off ignition
☞ Remove the key
☞ If the red indicator ring rises to position C
☞ Unscrew thread A
➥ The water drains
➥ Wait until the indicator ring returns to the bottom of the water separator
☞ Screw thread A back on again
Interrupt the fuel supply as follows:
☞ Turn ball-type cock B to the OFF mark
➥ Fuel supply is interrupted
☞ Turn ball-type cock B to the ON mark
➥ Fuel supply is open again
Thread A is fitted with a hose. Collect the water as it drains with a suitable container and
dispose of it in an environmentally friendly manner.
On
Off
C
B
A
Fig. 4: Water separator
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