Jeep Wagoneer/Commando/Cherokee 1984-1998

Power Brake Boosters

Imprimir

Removal & Installation



Non-ABS Equipped Models

See Figure 1

  1. Loosen, but do not remove the master cylinder retaining nuts.
  2.  
  3. Remove the instrument panel lower trim cover.
  4.  
  5. Remove the retaining clip attaching the booster pushrod to the brake pedal.
  6.  
  7. Loosen the vacuum hose clip and disconnect the hose from the check valve.
  8.  
  9. Remove the master cylinder retaining nuts and carefully move the master cylinder aside with the brake lines still attached.
  10.  
  11. Unfasten the booster retaining nuts/bolts and remove the booster.
  12.  

To install:
  1. Install the check valve and grommet in the booster.
  2.  
  3. Install the spacer on the booster (if equipped).
  4.  
  5. Position the booster on the firewall and fasten the booster mounting bolts/nuts.
  6.  
  7. Working inside the vehicle, install the nuts on the booster mounting studs. Tighten the bolts to 30 ft. lbs. (41 Nm).
  8.  
  9. Tighten the pedal pushrod bolt inner nut to 25 ft. lbs. (34 Nm) and then tighten the outer locknut to 75 inch lbs. (8 Nm).
  10.  
  11. Install the master cylinder and check for proper operation.
  12.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the power brake booster mounting

ABS Equipped Models
BENDIX ANTI-LOCK BRAKE SYSTEM

The power booster unit on the Bendix anti-lock brake system is an integral component of the master cylinder/pressure modulator/accumulator assembly. Refer to that removal procedure under the Bendix ABS portion later in this section.

TEVES MK-IV ANTI-LOCK BRAKE SYSTEM

A Diagnostic Readout Box (DRB II), or the equivalent type of scan tool, is essential to perform the bleeding of the ABS system.

  1. Pump the brake pedal until all vacuum is expelled from the booster.
  2.  
  3. Disengage the pedal travel sensor and remove the air cleaner.
  4.  
  5. Unfasten the clamps securing the reservoir hoses to the HCU pipes. Remove the hoses from the pipes.
  6.  
  7. Disengage the brake lines at the master cylinder.
  8.  
  9. Remove the combination valve bracket bolt (if necessary).
  10.  
  11. Remove the nuts attaching the master cylinder to the booster mounting. Remove the master cylinder from the vehicle.
  12.  
  13. Tag and disconnect vacuum hose at the booster check valve.
  14.  
  15. Disconnect the booster pushrod from the brake pedal.
  16.  
  17. Remove the nuts attaching the booster to the passenger compartment side of the dash panel.