Hydraulic Brake Servo - New Installation Procedures: Overview

Group: 47
Number: 92-02
Date: November 30, 1992

Subject:
New hydraulic brake servo-proper installation to avoid leakage

Model(s) and M.Y.'s:
5000/5000T 1984-1988
100/1000, 200/2000 1989-1991

Servo, identifying





Note
For all future repairs, the hydraulic brake servo used previously has been superseded by a new servo. The new brake servo has a different positioning of the pressure and return lines, as noted in the chart. These hydraulic lines MUST be connected in their proper locations, or damage and leakage will result.

Note
Brake servo units are paired with either long or short-version master cylinders. See chart which follows these illustrations, for vehicle application.





Original brake servo with LONG-version master cylinder





Original brake servo with SHORT-version master cylinder

^ with flange a


New brake servo with LONG-version master cylinder





insert new intermediate piece b (Part Number 443 611 105) onto brake servo push rod

CAUTION
Part numbers are for reference only. Always check with your Parts Department for latest information.

Note
The new brake servo design eliminates the O-ring between the master cylinder and the servo.

New brake servo with SHORT-version master cylinder





Note
The new brake servo design eliminates:
^ O-ring between the master cylinder and the servo
^ flange a (see illustration 47-800)





Master cylinder, vehicle applications