DG Flugzeugbau DG-1000T Maintenance Manual page 39

1.14.9.2 Cleaning
To clean the carburettor you should execute items 1 to 3. Switch on the ignition
to clean the carburettor by the electric fuel pump.
If the carburettor is clean, a jet of fuel will spurt out. In addition, the openings
for idle and main nozzle have to be cleaned with compressed air.
Warning: Don't bend the lever which actuates the needle valve.
1. Removal of the needle valve: Unscrew the carburettor cover and remove
together with the membrane. Loosen the mounting screw and remove the
lever, axle and needle valve as one unit. Be careful not to loose the return
spring.
2. Removal of the main nozzle:
Loosen the 2 screws and lift off the cover plate with the rubber seal Screw
out the main nozzle.
If it is necessary to remove the Tommy screw for cleaning you have to lift off
the fine adjustment screw which covers the tommy screw. Screw in the
Tommy screw first to note the number of turns.
3. Removal of the idle nozzle:
Screw in the Tommy screw first to note the number of turns and the actual
position of the lever (approx. 1 1/8 turn). Then turn out the Tommy screw.
In addition to the Tommy screw an idle nozzle must be screwed out. The
nozzle is located in the same compartment as the main nozzle below the main
nozzle.
4. Reassembling:
Screw in the Tommy screw(s) completely and then screw them out to the
noted positions.
The membrane is to be positioned between the rubber and the metal cover
plate. Use Loctite 243 to secure the screws of the carburettor cover. All
measures should be executed carefully and cleanly.
5. Carburettor setting:
Adjust the idle RPM by the idle adjustment screw to approx. 2500 RPM with
warm engine.
1.14.9.3 Intake air filter
An airfilter is mounted on the carburettor. Operation without air filter is
prohibited except for conservation of the engine see engine manual section 5.
Issued: December 2005
Maintenance Manual DG-1000T
1.25