Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Jeep Grand Cherokee
+ Cars of mark Jeep Grand Cherokee
+ Options and routine maintenance
+ Рядный the six-cylinder engine
+ Engine V8
+ Procedure of the general and engine major repairs
+ Systems of cooling, heating and air conditioning
+ The power supply system and release of the fulfilled gases
+ System of an electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of a gear change
+ Automatic transmission
+ Distributing box
+ Coupling and трансмиссионная a line
- Brake system
   The general information
   System of antiblocking of brakes (ABS) - the general information
   Replacement колодок disk brake mechanisms
   Removal, major repairs and installation of a support of the disk brake mechanism
   Condition check, removal and installation of a brake disk
   Replacement of boots of drum-type brake mechanisms
   Removal, major 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 condition and replacement of brake hoses and lines
   Prorolling of brake system
   Functioning check, removal and installation of the vacuum amplifier of brakes
   Functioning check, removal, installation and adjustment of the gauge-switch of stoplights
   Adjustment of a lay brake
   Replacement of cables of a drive of a lay brake
   Replacement of boots of a lay brake (disk brake mechanisms of back wheels)
+ Suspension bracket and steering
+ Body
+ System of an onboard electric equipment
+ Controls and operation receptions


Replacement of boots of drum-type brake mechanisms

Replacement of boots of drum-type brake mechanisms should be made simultaneously on both wheels - at all on one! Besides, it is necessary to pay attention that the dust developed by brake mechanisms in the course of their work can contain unhealthy asbestos. At all do not blow off a dust from surfaces of components of brake mechanisms the compressed air and do not inhale it. Works is better to make in a protective respiratory mask. At all do not use for cleaning of components of brake mechanisms solvents on an oil basis or gasolines - use only патентованными means for cleaning of brakes!

Simultaneously with boots necessarily it is necessary to change also clamping and returnable springs. Owing to cyclic thermal loadings to which springs continuously are exposed, after certain time they start to lose developed efforts that leads приволакиванию boots on drums and faster deterioration of working surfaces. At replacement of boots of brake mechanisms of back wheels use only патентованные and the components noted by the trade mark approved to sale by local authorities.


    Loosen the nuts of fastening of back wheels, поддомкратьте a back of the car also establish it on props. Block forward wheels wedges in avoidance откатывания the car. Release a lay brake. Remove a wheel and a brake drum (the Head of Adjustment and routine maintenance).

All four boots of both back brake mechanisms should vary simultaneously, however, in order to avoid casual перепутывания details work with each of mechanisms serially. Besides, the second thus can serve as the sample of correct assemblage in case of occurrence of any doubts.

    For performance of procedures of check of a condition and replacement of brake boots follow the scheme presented on illustrations more low. Try not to break an operations procedure and attentively get acquainted with explanatories to pictures.

If the drum does not give in to removal from a pin of a semiaxis and башмачной assemblages (the Head of Adjustment and routine maintenance), make sure that the lay brake is completely released, then moisten a joint between a nave and a drum getting oil. Allow to oil time to be absorbed, then repeat attempt of removal of a drum. If attempt appears again unsuccessful, it is necessary to compress brake boots. For this purpose at first it is necessary to take a stopper from a board of the brake mechanism. After stopper removal take away the lever from an adjusting gear castor by means of a narrow screw-driver, and the second narrow screw-driver turn a castor so that boots have departed from walls of a brake drum (see an illustration). Now the drum should act in film freely.

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

    Before removal of any of components of the brake mechanism clean assemblage with the help патентованного means and dry they be establish drain capacity under the brake mechanism for gathering of a washed off dirt - AT ALL DO NOT BLOW off the BRAKE DUST the COMPRESSED AIR!
    Delay the lever of a regulator and turn an adjusting gear castor for tap of boots from drum walls.
    Delay back a cable of the device of self-regulation and push the regulator lever back, having unhooked it from a back boot of the brake mechanism.
    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 procedure performance essentially is shown.
    Remove from a basic finger a cable of a self-regulator and a finger plate.
    Disconnect from a back boot a returnable spring and directing a cable.
    Disconnect keeping spring and a finger of a forward boot.

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

    Remove распорку a lay brake.
    Remove keeping 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 a lay brake from an axial finger.

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

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

… and a self-regulator cable.

    Pass the end of a returnable spring of a back boot through directing a cable, having hooked on it for an aperture in a boot, then pull a spring, having fixed it on a basic finger.
    Establish a returnable spring of a forward boot - application of the special tool shown in a picture will essentially facilitate assemblage (ask in shops of automobile accessories).
    Hook on a spring of the lever of a regulator for an aperture from the bottom part of a forward boot.
    Hook on a spring of the lever of a regulator and a cable for the lever and delay a cable downwards and back, having passed a lever hook in an aperture in the second boot.
    Knock on assemblage, achieving its correct centering on a brake board.
    Before installation into place check up a drum on presence of cracks, furrows, scratches and overheat signs (local change of colouring) its working surface. If defects cannot be restored by processing by an emery paper, the drum should be delivered in a workshop of car-care centre for проточки.

Composers of the given Management recommend to make проточку drums without dependence from their external condition each time at service of back brake mechanisms. If drums are worn out so that cannot be restored a way проточки without excess of admissible repair diameter (it is stamped on a drum), it is necessary to replace them. As a last resort, if you prefer to do without проточки drums, at least remove from their working surfaces polishing by means of an emery paper of the average size, making it on a working surface of a drum cyclic rotary motions.

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

    Establish a drum on a bridge flange. Remove rubber stoppers from brake boards. Pass in the formed aperture in a board a narrow screw-driver or the adjusting tool and, turning a gear castor, achieve weak pressing of boots to a working surface of a drum.
    Pass a narrow screw-driver or the adjusting tool in an aperture in a brake board and rotate a regulator castor as is shown in drawing, achieving weak pressing of boots to a working surface of a drum; then pass in an aperture a narrow screw-driver, take away the lever of a regulator from a castor and turn it in the opposite direction exactly before clearing of boots (the boot should start to rotate freely).
    Turn a castor in the opposite direction exactly so that the drum has started to rotate freely on an axis. For this purpose at first take away the lever of a regulator from a castor a screw-driver (differently it will not rotate). Repeat procedure of adjustment for the second drum and establish to the place of a stopper of brake boards. Establish wheels and nuts of their fastening, then lower the car on the earth. Tighten nuts of fastening of wheels with demanded effort (the Head of Adjustment and routine maintenance). For definitive self-regulation of brake mechanisms make some braking of the car at its movement as to lobbies, and a backing. As a result of performance of this procedure adequate functioning of a pedal of a brake should be reached. Before starting car operation check up serviceability of functioning of brakes.