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




Prorolling of brake system

More low the description of procedure of manual prorolling of brakes is offered to attention of readers. The given procedure is unique of procedures of prorolling of knots of brake system which can be executed own forces of the mechanic-fan. In case air for any reason will get to the hydraulic block of management (HCU), it is necessary to make prorolling about application of diagnostic scanner DRB II, and then once again to repeat manual prorolling. If at squeezing of a pedal of a brake there is a sensation of softness of its course even after prorolling of brakes, tow off the car in dealer branch where prorolling of system about application of scanner DRB II will be made. Operation of the car without performance of such prorolling becomes dangerous as other way to remove air from HCU does not exist.


At prorolling of brake system put on goggles. At liquid hit in an eye immediately wash out their plentiful quantity of water and address to the doctor.


Prorolling of brake system is made for the purpose of deducing of air which has got to it at рассоединении of contours during repair of components.

If air has got to system as a result of falling of level of a liquid or at a detachment of brake lines from the main cylinder, it is necessary to pump over all four brake mechanisms. For performance of such prorolling presence of scanner DRB II is necessary - tow off the car in a workshop of dealer branch of company Chrysler.

If the line detachment only one of mechanisms was made, will pump over only a support or the wheel cylinder of the given mechanism enough.

If the line was disconnected from the union located between the main cylinder and one of brake mechanisms, it is necessary to pump over all contour which structure includes the given union.

 PERFORMANCE ORDER

  1. Some times having squeezed out a brake pedal at the switched off engine, dump residual depression of the vacuum amplifier of brakes.
  2. Uncover the tank of the main cylinder and add in it a brake liquid. Establish a cover into place.

During prorolling constantly check liquid level in the tank and in case of need make having added. Too strong falling of level of a liquid will lead to hit in system of air and all work will be started up насмарку.

  1. Presence of a fresh brake liquid and the help of the assistant are necessary for procedure carrying out. Besides, prepare transparent capacity in which pour a little a brake liquid and a piece of a plastic or rubber hose in diameter about 4,8 mm which should be put on densely the prorolling gate, both a wrench for отдавания and gate twistings.
  2. Begin work with the right back wheel. Slightly ослабьте the gate of prorolling of the wheel cylinder, then tighten so to provide tightness, having left thus possibility of free and fast untwisting.
  3. Put on one end of the prepared tube the prorolling gate, and the second lower in transparent capacity so that it has appeared is shipped in a liquid.
  1. At prorolling of brake mechanisms the hose is connected to the prorolling gate on a support or the wheel cylinder and plunges into the brake liquid poured in a transparent vessel - air expelled from system will leave in the form of vials (prorolling should be continued until the exit of vials will not stop).
  1. Ask the assistant to rock some times a brake pedal, then to keep its squeezed out.
  2. While the pedal is kept squeezed out, open the prorolling gate so to provide an exit through it of a liquid/air. Observe of an exit of vials of air through the end of a tube shipped in a liquid. When a stream of a following liquid after pair seconds ослабнет, wrap the gate and ask the assistant to release a pedal.
  3. Repeat procedures of points 7 and 8 above until air will not stop to leave a tube. Then wrap the gate of prorolling and pass to the brake mechanism of the left back wheel. Having finished this prorolling, pass to right, and then - to left to forward wheels. Do not forget about necessity of constant tracking liquid level for the tank of the main brake cylinder.
  4. At all do not use the merged brake liquid repeatedly! It гигроскопична also it will be inevitable to contain a moisture essentially reducing efficiency of braking.
  5. On termination of prorolling fill in in the tank of the main cylinder a fresh brake liquid.
  6. Check up serviceability of functioning of brake system. The pedal should be squeezed out with firm resistance - without sensation of softness of a course. In case of default of this condition repeat system prorolling.

Do not start at all car operation if there is no confidence of efficiency of braking.

  1. On termination of prorolling spend trial runs, having made sure of serviceability of functioning of brake system.