Filling And Bleeding The Hydraulic Disc Brake - DG Flugzeugbau DG-1000T Maintenance Manual

4.6 Filling and bleeding the hydraulic disc brake

Note: The master cylinder is mounted in an horizontal position. Due to the
position of the reservoir filling and bleeding of the system is only possible from
the lowest point which is the brake cylinder assembly at the wheel.
Necessary tools and material:
 open-end wrench 1/4" = 6.35 mm for the bleeder valve at the cylinder assy..
 1 open-end wrench 11/16" = 18 mm.
 2 Plastic syringes acid resistant, volume ca. 100 ml (6 cu.in.). Use this
syringe for brake fluid only!
 1 bleeder assy. Tost No. 075890.
 1 m (3 ft.) transparent PVC hose inside diameter 8 mm (0.31 in.), fixed to
syringe and bleeder assy. with hose clamps.
 Brake-fluid DOT 3, DOT 4 or SAEJ 1703.
1. Preparations
- Raise the fuselage, extend the landing gear
- Fix the left wheel door in the fully open position
- Set the airbrake control in the retracted position
- Remove the baggage compartment floor and rear cover, check that the
actuating cable for the master cylinder is loose and that the piston rod of the
master cylinder is at its stop (brake open).
- Remove the main wheel according to section 4.5.1A or 4.5.2A. Place the
wheel so that the brake hose makes no bow above or below the horizontal. If
necessary lift the fuselage even more.
2. Filling
Warning: Brake fluid is poisonous!
Protect your hands and clothes. Remove all spilled brake fluid. Clean all parts
which had contact with brake fluid with alcohol, don't use fuel or solvents.
- Open the cover of the reservoir
- Fill the first syringe (with hose and bleeder assy.) with brake fluid, eliminate
all air bubbles.
- Remove the protection cap from the bleeder valve, attach the bleeder assy.
and fix it with the wrench 11/16".
- Open the bleeder valve at the cylinder assy., use the 1/4" wrench, fill in
slowly the complete volume avoiding air bubbles.
Issued: October 2014
Maintenance Manual DG-1000T
TN1000/24 4.12