Contents Wiring diagrams Section: Base Brakes - Service Information All sections

ALL EXCEPT HYDROBOOST RAM Pickup 3500

Base Brakes - Service Information 1 illustration ~229 words

ALL EXCEPT HYDROBOOST

Note. If master cylinder is replaced bleed cylinder before installation.

Note. Make sure the output rod of the brake booster is in position and retained by a output rod retaining ring, by looking into the boosters master cylinder mounting hole. This position will enable the output rod to enter inside of the master cylinder plunger sleeve during installation. Proper position is obtained when the output rod is centered perpendicular to the master cylinder mounting hole.

Note. Prior to installing the master cylinder assembly check that there is a vacuum seal present at the shoulder of the master cylinder flange and it's neck. A square seal must be present to ensure vacuum integrity with the booster.

Scheme 74

Scheme 74: ALL EXCEPT HYDROBOOST
1 - MASTER CYLINDER RESERVOIR
2 - CHECK VALVE
3 - VACUUM BOOST UNIT
4 - BOOSTER MOUNTING STUDS
5 - INPUT ROD
6 - OUTPUT ROD
7 - MASTER CYLINDER MOUNTING STUDS
8 - MASTER CYLINDER PLUNGER SLEEVE
9- MASTER CYLINDER
10 - ELECTRICAL CONNECTOR

Note. Take precautions to locate the master cylinder plunger over the booster output rod, before installing the master cylinder. If correctly fitted the master cylinder should slide easily onto the booster output rod before the mounting studs are engaged in the flange holes of the master cylinder.

  1. Gently install the master cylinder (9) on the mounting studs (7).
  2. Install new mounting nuts and tighten to 25 N.m (221 in. lbs.)
  3. Install the brake lines and tighten to 19 N.m (170 in. lbs.)
  4. Reconnect the electrical connector for the low fluid level switch.
  5. Fill and bleed the base brake system. Refer to «STANDARD PROCEDURE - BLEEDING»(ref-457773-S36299743282012030200000) .