AVL DiGas 4000 - Solenoid; Valve Unit; Particulate Filter

4000 4-/5-Gas Measuring Instruments Unit
Service Manual 5-7
5.3.1 Solenoid
(see Fig. 5-3)
• Disconnect the hose.
• Undo the hexagon screw fitting.
• Disconnect the power supply cable
(screw the Phillips screw out of the plug).
• Remove the solenoid together with the housing.
• Insert the new solenoid.
Reassemble in reverse order.
5.3.2 Valve Unit
(see Fig. 5-3)
• Remove the solenoid as described in section 5.3.1 above.
• Disconnect the hose.
• Remove the activated carbon filter at the zero gas input.
• Undo the hexagon nut on the valve unit at the rear.
• Replace the unit.
Reassemble in reverse order.
5.3.3 Particulate Filter
Fig. 5-5
Never use adhesive-type sealing material.
Remove the filter housing (it can be screwed off in one piece)
and change the filter.