Master Cylinder Installation Note
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
- Loosen the nut of the Adjustment Gauge (49-B043-001). Attach the adjustment gauge to the power brake unit. Tighten to specifications. See TORQUE SPECIFICATIONS .
- Using a vacuum pump, apply 19.7 in. Hg (66.7 kPa) of vacuum. See Fig 1 .
- Turn the adjusting nut of the adjustment gauge rod counterclockwise until the gauge rod just contacts the push rod end of the power brake unit. See Fig 2
. Push lightly on the end of the gauge rod to be sure it is seated. Verify that there is no gap between the adjusting nut and adjustment gauge rod body.CAUTION: When pushing the adjustment gauge rod into the master cylinder piston, only use enough pressure to push the rod to the bottom of the piston. If too much pressure is applied, a false reading will occur.
- Remove the adjustment gauge from the power brake unit without disturbing the adjusting nut. Set the adjustment gauge onto the master cylinder as shown in the illustration. See Fig 2 .
- Push lightly on the end of the adjustment gauge rod to be sure it has contacted the bottom of, the master cylinder piston, but do not push so hard that the piston moves. See Fig 3 . Note any clearance between the adjustment gauge body and the adjusting nut clearance at "C" or between the body and the master cylinder clearance at "B". See ADJUSTING PUSH ROD table. To adjust the push rod, see MASTER CYLINDER PUSH ROD under ADJUSTMENTS.
ADJUSTING PUSH ROD
| Measurement | Push Rod |
|---|---|
| Clearance At "B" | Too Short |
| Clearance At "C" | Too Long |
| No Clearance At "B" Or "C" | Ok |