Opel Astra, Zafira

Since 1998 of release

Repair and car operation

Йод для ума

Removal, service and installation of wheel cylinders of drum-type brake mechanisms of back wheels

In case of occurrence of leaks of a brake liquid wheel cylinders are subject to replacement without fail. Manufacturers do not recommend to undertake attempt of carrying out of regenerative repair of the given knots of brake mechanisms.

Removal

PERFORMANCE ORDER

Prop up forward wheels противооткатными boots. Поддомкратьте a back of the car also establish it on props.
Remove a brake drum and boots (Removal, check of a condition and installation of a brake drum see).
Clear the wheel cylinder and surfaces surrounding it of a dirt.
Uncover tank GTTS put under it a polyethylene film and screw on a place, - подкладывание films герметизирует landing of a cover and will prevent вытекание liquids at отпускании штуцерного connections of a flexible brake hose.
Remove the top coupling spring and dissolve in the parties brake boots, having liberated them from pistons.
Carefully having wiped the union, disconnect a hydraulic line from a back part of the wheel cylinder. In order to avoid a rounding off шлицов the union take advantage special накидным of a key with a cutting head. At a detachment do not pull for a metal tube of a brake line in order to avoid its deformation, capable it is essential to complicate connection procedure. At once закупорьте the open end of a brake line for the purpose of minimisation of losses of a liquid and in order to avoid hit in hydraulic system of a dirt.
Turn out a bolt of fastening of the wheel cylinder.
Remove the wheel cylinder from a brake board and transfer it on a pure workbench.

If on frictional overlays of brake boots there are traces of a hydraulic liquid, it is necessary to replace boots, and a working surface of a drum carefully to smooth out.

Service

PERFORMANCE ORDER

Carefully wipe the cylinder outside.

Remove from the cylinder both пыльника.
Design of the wheel cylinder of the drum-type brake mechanism of a back wheel

Usually pistons are freely pushed out from the cylinder under the influence of effort developed by a spring. In case of need закупорьте a face aperture of the cylinder wooden заглушкой push out the piston by giving in air cylinder through an entrance aperture from the foot pump.
Attentively study a condition of working surfaces of the cylinder and pistons. In case of revealing of obvious defects replace the cylinder.

Composers of the present Management recommend to make replacement of cylinders of both brake mechanisms of back wheels simultaneously.

If the condition of components is recognised by satisfactory, make replacement of sealing cuffs and пыльников, - corresponding ремнаборы always it is possible to find in shops of automobile accessories.
Grease new cuffs of pistons with a pure brake liquid and a finger fill them in the cylinder, in the middle having planted a spring.
Lower pistons in a pure brake liquid and fill them in the cylinder.
Establish new пыльники and check up freedom of a course of pistons.

Installation

PERFORMANCE ORDER

Make sure of absoluteness of cleanliness and dryness of interfaced surfaces of the cylinder and a brake board. Dissolve boots, establish the cylinder on the regular place and connect to it a hydraulic line, - yet do not tighten штуцерную a nut.
Screw fixing bolts and strongly them tighten, - now штуцерная a nut it is possible it is definitively tightened. Clean enclosed under a cover of tank GTTS polyethylene.
Fill boots in flutes of pistons and establish into place the top coupling spring.
Establish to the place of a brake drum (Removal, check of a condition and installation of a brake drum see).
Pump over brake system (Prorolling of brake system see), - it is enough to pump over only that contour which cylinder acted in film.
Make adjustment приводного a cable of a lay brake (Adjustment of a drive of a lay brake see). Also establish into place a control lever cover.
Before to start car operation, make sure of serviceability of functioning of brakes.