Nissan Patrol, Ford Maverick

1988-1997 of release

Repair and car operation



Nissan Patrol and Ford Maverik
+ Cars of the Nissan Patrol and Ford Maverick series
+ Diagnostics of malfunctions
+ Settings and routine maintenance
+ Engine
+ Systems of cooling, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ Systems of decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Transmission
+ Coupling
- Brake system
   Service of the main brake cylinder (GTTs)
   Service of the vacuum amplifier (servo-driver) of brakes
   Service of forward disk brake mechanisms
   Service of back drum-type brake mechanisms
   Service of back disk brake mechanisms
   Pumping of hydraulic system
   Service of a pedal of a brake
   Removal and valve installation - a pressure regulator
   Service of the parking brake
+ Forward and back bridges, running gear and steering
+ Body
+ Onboard electric equipment




Service of back disk brake mechanisms

For performance described below procedures the following special tools be required: a tsiferblatny measuring instrument (for check of palpation of a disk); a noniusny calliper (for measurement of residual thickness of a disk) and a steelyard (for measurement of effort of a prikhvatyvaniye of brakes).


 PERFORMANCE ORDER

  1. To Poddomkratta a car back also establish it on props. Remove back wheels.
  1. Through an observation port in the case of a support estimate residual thickness of frictional overlays of brake shoes (see an accompanying illustration). If the thickness of a slip any of blocks appears less admissible (see size tables and adjustments at the end of the Management) or if blocks are polluted by greasing or brake liquid, it is necessary to make replacement of all four blocks on brake mechanisms of both wheels.

If blocks appear are polluted, it is necessary to find out and eliminate the reason of leaks also.

  1. By means of a syringe pump out from the GTTs tank about two thirds of nominal amount of brake liquid.

The used liquid is not subject to the repeated use.

  1. Removal of liquid is made for the purpose of the prevention of its overflowing too much the tank at an utaplivaniye of pistons of supports for replacement of blocks.

Do not delete from the tank all liquid as it will cause need of pumping of hydraulic system.


  1. Give a bolt of the bottom directing finger and turn the support case up on the top finger (see an accompanying illustration), having opened access to brake shoes, adjusting laying and holders in an anchor bracket (directing blocks) a support.
  1. Remember the adjusting provision of components and remove from an anchor bracket holders, blocks and adjusting laying.
  2. Check adjusting laying and holders on existence of signs of wear and damages. Replace defective components.
  3. Establish adjusting laying on blocks, then establish in an anchor bracket in the landing provisions of a block (with laying) and holders. Moderately grease holders with silicone greasing.
  4. Push the piston perpendicularly into the support cylinder. In case of need use a clamp.
  5. Make sure of freedom of sliding of a support on directing fingers, then lower it on blocks.
  6. Establish the bottom directing finger and tighten its bolt with demanded effort.
  7. After completion of replacement of blocks of both brake mechanisms, several times squeeze out a brake pedal for the purpose of a usadka of blocks on disks. In case of need add brake liquid in the tank to demanded level.
  8. Establish back wheels and lower the car on the earth.
  9. Make trial runs of the car, having checked serviceability of functioning of brakes.

Major maintenance of a support

Components of a support of the back disk brake mechanism

1 — a bolt
2 — - a support
3 — - a cuff
4 — - a protective cover of a directing finger
5 — - the piston
6 — - a directing finger
7 — - a boot
8 — - an anchor bracket
9 — - a fixing ring
10 — - the holder
11 — - a protective cover of a directing finger
12 — - a bolt
13 — - a directing finger
14 — - adjusting laying
15 — - blocks
16 — - adjusting laying
17 — - the holder

 PERFORMANCE ORDER

  1. To Poddomkratta a car back also establish it on props. Remove back wheels.
  2. Give a shtutserny bolt and disconnect a brake hose from a support. To Zakuporta the hose end in order to avoid hit in hydraulic system of dirt and for the purpose of minimization of losses of brake liquid.
  3. Turn out a bolt of the bottom directing finger, turn a support up and remove it from the top directing finger.
  4. Remove a fixing ring of a boot of the piston.
  5. Press wooden whetstone to anchors of blocks of the case of a support and carefully squeeze out the piston of the support cylinder, submitting air under low pressure to an opening under installation of a hydraulic hose on the support case.

Excessive pressure of air can become the reason of pushing out of the piston with a high speed that is fraught with receiving traumas and piston damage.

  1. Remove a boot from the piston and take from the cylinder a piston cuff.

For extraction of a cuff use the blunt tool which has been preferably made of plastic or a tree.

  1. Take from an anchor bracket components of blocks.
  2. Wash out the cylinder of a support and the piston pure brake liquid.
  3. Check a cylinder mirror on existence of cavities, traces of corrosion, signs of wear and damages. In case of need replace the support case.

Minor defects can be removed by means of a thin emery paper.

  1. Check the piston on existence of cavities, traces of corrosion, signs of wear and damages. In case of need make replacement.

Do not try to polish the piston a thin emery paper as it will lead to damage of its facing layer.

  1. Check a condition of components of the blocks, directing fingers and an anchor bracket. Replace defective details.
  2. Will throw out all rubber components which have been removed from assembly of a support.
  3. Grease a new cuff of the piston and a boot with greasing for rubber components and establish a cuff in a cylinder flute. Track correctness of landing of a cuff in a flute, - it should not appear overwound.
  4. Put on a boot the piston and grease the last with pure brake liquid.
  5. Completely drown the piston in the cylinder of a support and fix a boot in a flute on the brink of the cylinder, fix it a fixing ring.
  6. Establish in an anchor bracket components of blocks.
  7. Pick up a steelyard to a hairpin of fastening of a wheel and measure effort of resistance. Write down result of measurement. In case of need check adjustment of a pretightness of the stupichny bearing.
  8. By means of the tsiferblatny measuring instrument fixed on a component of a forward suspension bracket with pressed to a face surface of a brake disk by a plunzher, measure size of palpation of a disk. If the result of measurement leaves out of admissible limits (see size tables and adjustments at the end of the Management), pierce a disk, or make replacement.
  9. By means of a noniusny calliper measure thickness of a brake disk in several points on forming. In case of need pierce a disk or replace it.
  10. Grease new protective covers of directing fingers with greasing for rubber components and pull them on fingers.
  11. Dress the support case on the top directing finger and turn it down, dressing on brake shoes. Screw and tighten with demanded effort a bolt of the bottom directing finger.
  12. Connect to a support a brake hose and tighten a shtutserny bolt with demanded effort.
  13. Pump over hydraulic brake system.
  14. For five seconds squeeze out a brake pedal.
  15. Release a pedal and turn a nave of a forward wheel on ten turns.
  16. By means of a steelyard measure effort of resistance to a nave a provorachivaniya.
  17. Subtract result of the first measurement from result of the effort of a prikhvatyvaniye of a brake second for the purpose of definition. The maximum admissible value makes 5.7 kgfs, at its excess find getting jammed components and make necessary repair.







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