Abstract: Disclosed is a brake adjustment indicator which is suited for the retrofit installation on pneumatic or the like brakes systems. The indicator comprises of a plastic scratch resistant sleeve that is of three colors and fits securely over the push rod of the pneumatic actuator between the push rod attachment at the diaphragm and the clevis locking nut at the slack adjuster. The sleeve has an outside diameter permitting it to be received in the aperture of the ambient brake chamber which receives the push rod. The inside diameter of the sleeve is that of the outside diameter of the push rod. The memory of the plastic material holds the indicator on the push rod. The length of the indicator is that of the push rod between the attachment at the diaphragm and the locking nut of the clevis at the slack adjuster, with color lengths corresponding to type of application and design. When the brake is applied the sleeve travel observed outside the brake chamber is the same as that of the push rod.