Nissan Patrol, Ford Maverick

1988-1997 of release

Repair and car operation

Diagnostics of malfunctions of brake system

The brake pedal is excessively hardly squeezed out

Brake shoes (disk brake mechanisms), or frictional overlays of boots (drum-type brake mechanisms) not that type are established. Check, make replacement.

Passableness of the brake line going from the main brake cylinder (GTTs) is broken. Check lines, eliminate the blocking reason, or make replacement.

The axis of a brake pedal is jammed. Execute necessary repair, or replace axial a bolt and plugs.

The piston of a wheel cylinder/support is jammed. Execute major maintenance of a cylinder/support.

Functioning of the vacuum amplifier of brakes is broken. Check serviceability of the amplifier (see. Head Brake system).

"Prikhvatyvaniye" of brakes takes place

Passableness of GTTs unions is broken. Check, clean GTTs and the tank of brake liquid.

The piston of a wheel cylinder/support is jammed. Execute necessary repair.

The cable of a drive of the parking brake is jammed. Replace a cable.

Are broken, or coupling springs of boots of the drum-type brake mechanism are extended. Replace defective springs.

Adjustment of pushers of vacuum amplifier/GTTs is broken. Check, make necessary adjustments.

For identification of signs of a prikhvatyvaniye of brakes поддомкратьте the car also establish it on props. Serially rotating wheels manually, whether check brakes are taken. If all wheels rotate freely, ask the assistant to squeeze out and release a pedal of a foot brake. Make sure that brake mechanisms "release" wheels without a delay. Violation of passableness of the GTTs union causes a simultaneous prikhvatyvaniye of two wheels which brake mechanisms are switched on in the corresponding concrete hydraulic contour. Release the pumping gate on one of the taken wheels, having made sure that the reason of a prikhvatyvaniye is pressure increase in a contour.
Jamming of a driving cable of the parking brake usually conducts to a prikhvatyvaniye of the back driveshaft. For check поддомкратьте a car back also establish it on props, disconnect a driving cable from the executive lever, - the back driveshaft should start to rotate freely.

The noise published by brake mechanisms take place

Braking is accompanied by squeal. Zapolirovan material of frictional slips. Remove suspected blocks/boots (see an accompanying illustration) and remove polishing from their surface by means of an emery paper.

Braking is accompanied by a gnash. The material of frictional slips is worn-out. Check a condition of blocks/boots and disks/drums of suspected brake mechanisms. Replace worn-out blocks/boots, give to a pro-point the spoiled disk/drum (see an accompanying illustration).

Squeal of brakes in most cases is caused by a zapolirovyvaniye to shine of surfaces of frictional overlays of brake shoes, however it is not necessary to lose sight and such possible reasons as use of blocks of improper type, and also loss of antivizgovy springs or protivoskripny slips.
If wear of frictional overlays of blocks/boots to substrate metal takes place, all four blocks/boots even if on an opposite wheel they are in good repair are subject to replacement.
At a strong istsarapyvaniye of a brake disk/drum it is necessary to pierce or replace it for restoration of efficiency of braking.

Low "softness" of a course of a brake pedal takes place

The automatic regulator of brake mechanisms of back wheels failed. Make necessary repair, or replace a regulator.

Level of brake liquid fell. Check system on existence of signs of leaks, - attentively examine all shtutserny connections (see an accompanying illustration). Execute necessary repair, restore level of liquid and pump over hydraulic system.

Air got to hydraulic system. Pump over system.

In most cases "softness" of a course of a brake pedal appears connected with hit in hydraulic system of air. Surely it is necessary to find a source of penetration of air and to eliminate taking place defect (consolidation or shtutserny connection). Then the system should be pumped over.
It is easy to determine defective components of brake system by existence on their surface of traces of leakages of brake liquid. When braking there is a blocking of wheels

The zasalivaniye of frictional overlays of blocks/boots owing to hit on them of oil or brake liquid takes place. Reveal and eliminate the pollution reason, replace blocks/boots.

The brake drum is deformed. Check, make necessary replacements.

Blocks/overlays of boots not that type are established. Check, make replacement.

Coupling springs of brake boots are broken or extended. Check, replace defective springs.

The valve of adjustment of pressure is faulty. Replace the valve.

Remove all wheels and, estimate degree of wear of frictional slips and check them on existence of signs of pollution by oil. Check a condition of coupling springs of brake boots, having compared their free length to that for new springs.
Sign of deformation of a brake drum is the pulsation of a brake pedal at easy braking.
If back wheels are constantly blocked, it is necessary to check serviceability of a regulator of pressure.

Pedal pulsations take place during braking

The brake drum/disk is deformed. Pierce a defective component.

Stupichny bearings of lobbies or back wheels are worn-out, or weakened their pretightness. Execute pretightness adjustment, or replace defective bearings.

The deformed brake drums/disks are subject to a pro-point. It is necessary to charge this work to experts of a workshop of car-care center who also will help you to define expediency of this procedure. Probably it is necessary to get new components.

"Withering" of brakes takes place

There was a zasalivaniye of frictional overlays of blocks/boots owing to hit on them of oil or brake liquid. Reveal and eliminate the pollution reason, replace blocks/boots.

The brake drum is deformed. Check, make necessary replacements.

The automatic regulator of the back brake mechanism failed. Execute necessary repair of a regulator.

Blocks/boots not that type are established. Make replacement.

Brake liquid is polluted. Empty hydraulic system and fill in fresh brake liquid. Pump over brakes.

In most cases withering of brakes occurs owing to performance of the sharp and frequent braking conducting to a warming up of frictional slips and disks/drums of brake mechanisms. After an ostuzheniye of mechanisms braking should settle into shape.

There is an overheat of brake mechanisms

The automatic regulator of the brake mechanism of a back wheel failed. Execute necessary repair.

Coupling springs of brake boots are broken or extended. Check, replace defective springs.

Adjustment of pushers of vacuum amplifier/GTTs is broken. Check, make necessary adjustments.

The piston of a wheel cylinder/support is jammed. Execute necessary repair.

It is damaged or blocked a hose/tube of the hydraulic brake line (see an accompanying illustration). Eliminate the blocking reason, or replace defective a hose/tube.

The GTTs union is blocked. Check, clean the cylinder and the tank of brake liquid.

Braking is too sharply carried out. Change a driving manner.

To check brake mechanisms on jamming поддомкратьте the car and establish it on props. Serially rotate each of wheels hands. If the piston wheel hurrah / a support of one of brake mechanisms is jammed, it is meaningful to check and make regenerative repair of all cylinders/supports, and also GTTs.

There was a refusal of brakes

GTTs failed. Remove the cylinder, execute its regenerative repair, pump over hydraulic system.

Level of brake liquid owing to leakages of supports / wheel cylinders fell. Execute necessary repair, pump over hydraulic system.

Level of liquid fell owing to leakages of brake hoses/tubes. Replace defective components, pump over hydraulic system.

Air got to hydraulic system. Find out and eliminate the reason, pump over system.

Brake liquid is polluted. Empty system, fill in fresh liquid, pump over brakes.

For search of sources of leaks fill in GTTs with brake liquid and ask the assistant to shake a pedal of a foot brake. Thus try to register external leakages of liquid visually.