Jeep Grand Cherokee

1993-1999 of release

Repair and operation of the car



Jeep Grand Cherokee
+ Cars of the Jeep Grand Cherokee brand
+ Settings and routine maintenance
+ Line six-cylinder engine
+ V8 engine
+ Procedures of the general and capital repairs of the engine
+ Cooling systems, heating and air conditioning
+ A power supply system and production of the fulfilled gases
+ System of electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
- Brake system
   General information
   System of anti-blocking of brakes (ABS) - the general information
   Replacement of blocks of disk brake mechanisms
   Removal, capital repairs and installation of a support of the disk brake mechanism
   Check of a state, removal and installation of a brake disk
   Replacement of boots of drum brake mechanisms
   Removal, capital repairs and installation of wheel cylinders
   Removal and installation of the combined valve (regulator)
   Removal and installation of the main brake cylinder
   Check of a state and replacement of brake hoses and lines
   Pumping of the brake system
   Functioning check, removal and installation of the vacuum amplifier of brakes
   Functioning check, removal, installation and adjustment of the sensor switch of stoplights
   Adjustment of the parking brake
   Replacement of cables of the drive of the parking brake
   Replacement of boots of the parking brake (disk brake mechanisms of back wheels)
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and methods of operation



Replacement of boots of drum brake mechanisms

Replacement of boots of drum brake mechanisms has to be made at the same time on both wheels - at all not on one! Besides, it is necessary to pay attention that the dust produced by brake mechanisms in the course of their work may contain noxious to health asbestos. Do not blow off dust from surfaces of components of brake mechanisms compressed air at all and do not inhale it. It is the best of all to perform works in a protective respiratory mask. Do not use for cleaning of components of brake mechanisms solvents on an oil basis at all or gasolines - use only patent means for cleaning of brakes!


Along with boots surely it is necessary to change also clamping and returnable springs. Owing to cyclic thermal loadings to which springs continuously are exposed later certain time they begin to lose the developed efforts that leads to a privolakivaniye of boots on drums and more bystry wear of working surfaces. When replacing boots of brake mechanisms of back wheels use only the patent and noted by a trademark components approved to sale by local authorities.


 PERFORMANCE ORDER

  1. Weaken nuts of fastening of back wheels, a back of the car and establish to a poddomkratta it on props. Block forward wheels wedges in order to avoid a car otkatyvaniye.
  2. Release the parking brake.
  3. Remove a wheel and the brake drum (The head Nastroyki and routine maintenance).

All four boots of both back brake mechanisms have to change at the same time, however, in order to avoid a casual pereputyvaniye of details work with each of mechanisms serially. Besides, the second at the same time can serve as a model of the correct assembly in case of any doubts.

  1. For performing procedures of check of a state and replacement of brake boots follow the scheme given on illustrations below. Try not to break an operations procedure and attentively get acquainted with explanations to pictures.

If the drum does not give in to removal from a pin of a half shaft and shoe assembly (The head Nastroyki and routine maintenance), make sure that the parking brake is completely released, then moisten a joint between a nave and a drum the getting oil. Give to oil time to be absorbed, then repeat attempt of removal of a drum. If the attempt is unsuccessful again, it is necessary to squeeze brake boots. For this purpose at first it is necessary to take a stopper from a board of the brake mechanism. After removal of a stopper take away the lever from an adjusting gear castor by means of the narrow screw-driver, and the second narrow screw-driver turn a castor so that boots departed from walls of the brake drum (see an illustration). Now the drum has to be removed freely.


Components of assembly of a drum of the back brake mechanism - the left mechanism is shown.

  1. Before removal of any of components of the brake mechanism clean assembly by means of patent means and dry it - establish drain capacity under the brake mechanism for collecting the washed-away dirt - AT ALL DO NOT BLOW OFF BRAKE DUST COMPRESSED AIR!
  1. Delay the lever of the regulator and turn an adjusting gear castor for withdrawal of boots from drum walls.
  1. Delay a cable of the device of self-regulation back and push the regulator lever back, having unhooked it from a back boot of the brake mechanism.
  1. Remove from a basic finger returnable springs both (forward and back) boots - in a picture the tool for removal of springs (ask in shops of automobile accessories), which application allows to facilitate implementation of the procedure significantly is shown.
  1. Remove a cable of the self-regulator and a plate of a finger from a basic finger.
  1. Disconnect a returnable spring and a guide of a cable from a back boot.
  1. Disconnect the holding spring and a finger of a forward boot.

… then separate a forward boot and the adjusting screw from a brake board.

  1. Remove a strut of the parking brake.
  1. Remove holding and a finger of a back boot, then separate a boot from a board of the brake mechanism - having hooked the lever, remove a clip of the executive lever of the parking brake from an axial finger.

… then disconnect the lever from a back boot - try not to lose a spring washer.

  1. Grease contact surfaces of brake boots (arrow) with high-temperature lubricant.
  1. Connect a new boot to the executive lever of the parking brake, establish a spring washer and a lock clip, having reduced its sponges by means of flat-nose pliers.
  1. Establish a back boot with the holding spring on a brake board, then place the end of a strut of the parking brake in reciprocal deepening (shooter).
  1. Grease the adjusting screw with high-temperature lubricant.
  1. Press a forward boot to a brake board, then establish the holding spring - track that the rack of the parking brake and pushers of the wheel cylinder entered gearing with cuts of boots.
  1. Establish a plate of a basic finger …

… and self-regulator cable.

  1. Pass the end of a returnable spring of a back boot through a cable guide, having hooked on it for an opening in a boot, then pull a spring, having fixed it on a basic finger.
  1. Establish a returnable spring of a forward boot - use of the special tool shown in a picture significantly will facilitate assembly (ask in shops of automobile accessories).
  1. Hook on a regulator lever spring for an opening from the lower part of a forward boot.
  1. Hook on a spring of the lever of the regulator and a cable for the lever and delay a cable down and back, having passed a lever hook throughout an opening in the second boot.
  1. Knock on assembly, trying to obtain the correct centering it on a brake board.
  1. Before installation into place check a drum for existence of cracks, furrows, scratches and signs of an overheat (local change of coloring) of its working surface. If defects cannot be restored by processing by an emery paper, the drum has to be delivered in a workshop of car service for a pro-point.

Authors of this manual recommend to make a pro-point of drums regardless of their external state every time at service of back brake mechanisms. If drums are worn-out so that they cannot be restored by a pro-point without excess of admissible repair diameter (it is stamped on a drum), they need to be replaced. As a last resort, if you prefer to do without pro-point of drums, at least remove from their working surfaces polishing by means of an emery paper of the average size, making it on the working surface of the reel cyclic rotary motions.


The maximum admissible diameter of a drum is beaten usually out (or it is cast) on its case.

  1. Install the reel on a bridge flange. Remove rubber traffic jams from brake boards.
  2. Pass throughout the formed opening in a board the narrow screw-driver or the adjusting tool and, turning a gear castor, achieve weak pressing of boots to the working surface of the reel.
  1. Pass the narrow screw-driver or the adjusting tool throughout an opening in a brake board and rotate a regulator castor as shown in the drawing, trying to obtain weak pressing of boots to the working surface of the reel; then pass the narrow screw-driver throughout an opening, take away the regulator lever from a castor and turn it in the opposite direction exactly before release of boots (the boot has to begin to rotate freely).
  1. Turn a castor in the opposite direction exactly so that the drum began to be rotated freely on an axis. For this purpose at first take away the regulator lever from a castor the screw-driver (otherwise it will not rotate).
  2. Repeat the procedure of adjustment for the second drum and establish to the place of a stopper of brake boards.
  3. Establish wheels and nuts of their fastening, then lower the car on the earth. Tighten nuts of fastening of wheels with the required effort (The head Nastroyki and routine maintenance).
  4. For final self-regulation of brake mechanisms make several braking of the car at its movement both to lobbies, and a backing. As a result of implementation of this procedure adequate functioning of a pedal of a brake has to be reached.
  5. Before starting operation of the car check serviceability of functioning of brakes.