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• Fill the first syringe again, open the bleeder valve and fill in further brake-
fluid. Look at the reservoir while filling to see if air bubbles are coming
out of the line. Fill up to 15 mm (0.6 in.) below the upper edge of the
reservoir.
• Close the bleeder valve, reinstall the membrane and the cap to the
reservoir and remove the bleeder assy.
• Check brake pressure according to step 4.
• Reinstall the eye bolt.
4. Check brake pressure
•
extend the airbrakes, there must be a strong pressure when the wheel
brake engages.
•
check several times, the wheel brake must engage at the same point every
time
•
if this is not the case, you have to bleed the system again
5. Check the hydraulic brake system for leaks
•
extend the airbrakes with high force and hold it in this position for 2
minutes.
•
Then check the whole hydraulic system visually for leaks. If necessary
tighten the screwed joints or replace the sealings and bleed the system
again.
Note: The adjustment of the length of the cable between the master cylinder and
the airbrake control shaft restricts the max. airbrake extension height. The
adjustment of this cable should be done with the glider rigged.
6. Bleeding the hydraulic brake system
•
Remove the brake fluid from the reservoir using the syringe.
•
Then execute again items 3 and 4 of this instruction.
7. Exchanging brake fluid (every 4 years)
• Perform preparations (see step 2.) of this instruction. It is not necessary
to remove the main wheel.
• Fill the system with new brake fluid (see step 3.). To accomplish this
remove all brake fluid from the reservoir first with the second syringe.
Used brake fluid is darker than new brake fluid and can easily be
identified. Watch the reservoir while filling to see when the new fluid
streams into the reservoir. Repeat the filling process until only new fluid
is in the system and no air bubbles can be detected.
• Perform steps 4. and 5. of this instruction.
Issued: July 2015
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
Maintenance Manual DG-1000M
TN1000/27
4.12
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