Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
9.1. Specifications
9.2. System of antiblocking of brakes (ABS) - the general information and codes of malfunctions
9.3. Check of a condition and replacement of brake lines and hoses
9.4. Replacement колодок disk brake mechanisms of forward wheels
9.5. Removal and installation of a support of the disk brake mechanism
9.6. Removal and installation of a brake disk
9.7. Replacement of brake boots of drum-type brake mechanisms of back wheels
9.8. Removal and installation of the main brake cylinder (ГТЦ)
9.9. Removal and installation of assemblage of the vacuum amplifier of brakes
9.10. Prorolling of brake system
9.11. Adjustment of a drive of a lay brake
9.12. Adjustments of a pedal of a foot brake
9.13. Adjustment of a spring of the valve-regulator sensitive to loading (LSV)
9.14. Adjustment of gauges-switches of stoplights and темпостата
9.15. Removal and hydromodulator ABS installation
9.16. Removal and G-gauge installation
9.17. Check of serviceability of functioning of wheel gauges ABS
9.18. Check of serviceability of functioning of the G-gauge
9.19. Check of serviceability of functioning of the relay приводного the hydromodulator electromotor
9.20. Check of serviceability of functioning of the relay of the electromagnetic valve of hydraulic modulator ABS
10. A suspension bracket and a steering
11. A body
12. An electric equipment


9.10. Prorolling of brake system

Prorolling of brake system make in goggles. At casual hit of a brake liquid in eyes immediately wash out their plentiful quantity of water and address for the help to the doctor!

Prorolling of hydraulic system is made for the purpose of removal from it air getting to a path at performance of service of brake mechanisms, replacement of hydraulic lines or ГТЦ, and also at lowering below the minimum admissible value of level of a liquid in the tank of the main cylinder. If air has got to system owing to falling of level of a liquid in tank GTTS, or at a detachment from ГТЦ brake lines, brake mechanisms of all four wheels are subject to prorolling.

At a detachment of hydraulic lines from any of supports / of wheel cylinders will enough pump over only given concrete brake mechanism.

If the detachment of a brake line from the union located between ГТЦ and one of brake mechanisms was made, the given part of a brake contour is pumped over only.

Each of brake mechanisms is pumped over in an individual order. It is necessary to begin with as much as possible removed (on length of a hydraulic contour) from ГТЦ the mechanism. Full prorolling is made in a following order:

  1. The left back brake mechanism
  2. The right back brake mechanism
  3. The left forward brake mechanism
  4. The right forward brake mechanism.

On the models equipped with the valve-regulator sensitive to loading, last is pumped over before prorolling of wheel cylinders.


  1. Some times squeeze out a pedal of a foot brake at the muffled engine for dump of residual depression in the vacuum amplifier of brakes.
  2. Preliminary carefully having wiped, uncover tank GTTS, necessarily add to the tank a fresh liquid, then enclose under a cover polyethylene and screw it into place.

Do not forget to check regularly liquid level in the tank during prorolling performance. Excessive falling of level is fraught with hit in ГТЦ air that will bring to naught all undertaken efforts and will cause necessity of prorolling of all brake system.

  1. Secure with the help of the assistant, prepare a stock of a fresh brake liquid, the transparent vessel partially filled with a hydraulic liquid, the piece of a plastic hose which is densely put on the gate of prorolling, and approaching rozhkovyj/накидной a key for otpuskanija/tightenings of gates.
  2. The gate of prorolling of disk brake mechanisms is located directly on the case of a support, drum-type — from the back party of a brake board.
  3. Carefully having wiped, remove a protective cap and slightly ослабьте the gate of prorolling of the brake mechanism of a corresponding wheel, then again tighten it so that it easily and it was quickly released during procedure performance.
  4. Pull on the gate the suitable plastic or rubber hose which second end lower in transparent vessel partially filled with a pure brake liquid. The hose cut should appear completely shipped in a liquid.
  5. Ask the assistant to squeeze out slowly some times a pedal of a foot brake, having lifted thereby pressure in system.
  6. At the brake pedal fixed in the bottom position slightly open the prorolling gate so that from it the brake liquid has started to be superseded. Watch an exit of a liquid from a hose. Through pair seconds when a pressure ослабнет, close the gate and allow to release to the assistant a pedal.
  7. Repeat procedures of last two paragraphs until the free liquid will not start to follow from the gate from air bubbles. Operating in a similar manner, pump over mechanisms of the remained wheels of the car.

Constantly watch that liquid level in tank GTTS did not fall excessively low!

  1. At all do not add in the tank an old brake liquid, — it is in the higher measure гигроскопичной and in due course absorbs in itself a lot of moisture that conducts to falling of a point of its boiling and, as consequence, to decrease in efficiency of braking. Besides, presence at hydraulic system of a moisture promotes the accelerated ageing of a material of flexible brake hoses.
  2. On termination of prorolling add in tank GTTS a fresh brake liquid, having resulted its level in norm.
  3. Check up efficiency of functioning of brakes. The pedal at squeezing should show firm resistance, — the sensation of softness of its course testifies to presence in hydraulic contours of air and necessity of repetition of procedure of prorolling.

Do not start at all car operation, without being are absolutely assured of serviceability of functioning of brake system!

On page back
9.9. Removal and installation of assemblage of the vacuum amplifier of brakes
On the following page
9.11. Adjustment of a drive of a lay brake