TM 9-2320-280-20-2
7-10. SERVICE BRAKE SYSTEM BLEEDING INSTRUCTIONS (Cont’d)
c. Master Cylinder Bleeding
1.
2.
3.
4.
5.
6.
7.
8.
7-22
N O TE
Perform this procedure prior to installing master cylinder on vehicle.
Secure master cylinder flange (5) in vise.
Remove cover (1) and fill reservoirs (2) with silicone brake fluid.
Screw threaded end of bleeder hose (3) into brake line port on master cylinder (6) and insert opposite
end into reservoir (2). Repeat step for other bleeder hose (3).
Slowly push piston (4) into master cylinder (6). Do not release piston (4). While holding piston (4),
pinch bleeder hoses (3) off and release piston (4). Piston (4) will return automatically.
CAUTION
Whenever the master cylinder is filled with silicone brake fluid, let
cylinder sit undisturbed for 30 minutes minimum to ensure that
all visible as well as minute air bubbles are gone.
Refill reservoirs (2) with silicone brake fluid and repeat step 4 until no air bubbles remain in
brake fluid.
Remove two bleeder hoses (3) from brake line ports on master cylinder (6).
Install cover (1) on master cylinder (6) and remove from vise.
Install master cylinder (para. 7-13).
