Bleeding The Disc Brake System; General; Manual Bleeding - TUG MZ Operation Maintenance & Parts Manual

E.

BLEEDING THE DISC BRAKE SYSTEM

1.

General

(a)
(b)
(c)
2.

Manual Bleeding

(a)
Note
(b)
CD373
If the caliper was removed for overhaul, or if the brake hose or steel line was
disconnected for any other reason, it will be necessary to bleed all air from the
calipers and connecting lines.
Prior to bleeding the system, it is important to check the master cylinder reservoir.
Use hydraulic fluid, DOT 3, Extra Heavy Duty Brake Fluid to bring the level up to
within one-eighth (1/8) inch of the top.
Brakes can be bled either manually or with pressure bleeding equipment.
CAUTION: FLUID FLUSHED OR BLED FROM A VEHICLE'S BRAKE
SYSTEM SHOULD BE DISCARDED. SUCH FLUID IS NOT SAFE FOR
REUSE FOR ANY PURPOSE.
Manual bleeding requires two people; one to pump the brake pedal and another to
operate the bleeder valves. Make sure that the master cylinder is full. After the
bleeder valve is opened, depress the brake pedal one full stroke, close bleeder valve,
then allow the pedal to return slowly to the released position. Allowing the pedal to
return too quickly may draw air into the system. Continue operating the pedal in this
manner until caliper is bled. Refill the master cylinder and go on to next caliper.
NOTE: To ensure that air is not sucked into the system, the bleeder valve
must be closed at the end of each stroke, before the brake pedal is released.
Check the fluid level in the reservoir frequently during the bleeding procedure.
MZ Tow Tractor
Chapter 3
Section 5
3-5-11
Orig