Bleeder Screw - Meritor MM-2075 Maintenance Manual

During brake application, the hydraulic pressure is uniformly
applied to the rear of all pistons. The pistons extend out of the
bores and push the brake pads into contact with the rotor. The
hydraulic force creates a clamp force resulting in braking. After the
brake is released, the pressure is released and the pistons retract.
CAUTION
Do not actuate a brake with the brake pads or shoe linings
removed, or damage to parts can result.
The piston seals provide sealing but also act as a spring to retract
the pistons after the brake is released.
As the linings wear, the pistons extend out further. The void is
backfilled with brake fluid available in the brake reservoir.
BLEEDER
SCREW
Figure 3.1
(16579)
Printed in USA
BLEEDER
SCREW
INLET
PORT
CROSSOVER TUBE
4006991b
Copyright Meritor, Inc., 2023
3 Introduction
MM-2075 / Revised 09-23
Page 7