Opel Corsa B - the Repair manual and operation

12.1. General information

In a forward suspension bracket two depreciation racks of McPherson consisting of a screw spring and the built-in hydraulic shock-absorber are applied Depreciation racks fasten with a body and rotary fists bolts. Side shift is limited to cross levers which are connected with the corresponding rotary fists through replaceable spherical support. Cross levers are connected with a body through rubber support. Longitudinal shift is limited by the drafts fixed on cross levers. The stabilizer of cross stability connects both drafts among themselves. Thanks to it on turns the car inclination decreases. The torque of the engine is transferred to forward wheels through power shafts. Power shafts have various length and are equipped with the hinges of equal angular speeds (HEAS). Bearings of forward wheels do not understand and replaced completely.

Design of a forward suspension bracket

1 — the Internal CV JOINT On l DOHC 1.0 and 1.2 engines: Tripodny hinge. 2 — the Cover of the internal CV JOINT 3 — the Power shaft 4 — the External CV JOINT 5 — the Cover 6 — the compression course Buffer 7 — the Shock-absorber 8 — the Basic bearing 9 — Prostavka 10 — the Top cup of a spring 11 — the Damping ring 12 — Pruzhina	13 — the Rotary fist 14 — the Wheel bearing 15 — a wheel Nave 16 — the Brake disk 17 — Koronchataya a stupichny nut 18 — the Holder of draft 19 — the Stabilizer of cross stability 20 — Draft 21 — the Rubber support 22 — the Cross lever of a suspension bracket 23 — the Spherical support 24 — the Damping plug 25 — Bolts with a fillet

The Opel Corsa and Tigra cars are equipped with a back suspension bracket with levers and a connecting beam the Suspension bracket consists of an open cross pipe on which from each party the longitudinal lever is welded. In a cross pipe there is an additional stabilizer. Longitudinal levers are connected to a body through rubber-metal support bolts. For decrease in feeling of roughnesses of the road screw springs and hydraulic shock-absorbers serve. Bearings of back wheels have a possibility of adjustment. The Combo model has a rigid axis with laminated springs and shock-absorbers which are characterized by high durability. Such design provides a possibility considerably of bigger loading of the car. In comparison with the Corsa B and Tigra models the design also of bearings of back wheels is changed They are built in not brake drums, and located in the separate nave fastening to the brake drum bolts.

Design of a back suspension bracket of the Corsa and Tigra models

1 — the Shock-absorber 2 — the Screw spring 3 — the Connecting beam 4 — the Stabilizer of cross stability 5 — the Damping plug

Design of a back suspension bracket of the Combo models

1 — Forward fastening of a spring 2 — the Spring 3 — the Additional spring 4 — Back fastening of a spring 5 — Assembly of a wheel nave

From 09.1997 g of release on the Combo models the design of a cover of a nave of wheel bearings is changed.

The steering drive consists of a steering wheel, a steering shaft and steering drafts. The steering wheel is fixed on the helmsman to a shaft which is connected with the steering mechanism. Rotation of a steering shaft is transmitted through gear and rack gearing to a gear lath. The gear lath via spherical hinges is connected with steering drafts. The last via hinges and rotary fists give the movement to forward wheels of the car. The steering drive has to have the easy course and should not have side plays. He does not demand service, but during maintenance it is necessary to check tightness of sealing cuffs. Depending on model and a complete set of the car it can be equipped with the hydraulic booster of steering (GUR). Cars with DOHC 1.0 and 1.2 engines of l are equipped with the electric power steering (EPS); on cars with OHC engines from 1.2 to 1.7 l usual GUR is applied. A problem of GUR is decrease in effort, it is necessary for turn of a steering wheel, first of all, at a low speed or on the parking.

Design of a steering column

1 — the Casing of a steering column 2 — the ignition lock Cylinder 3 — the Understeering switch of screen wipers 4 — the Top overlay of a steering column	5 — the Steering wheel 6 — the Cable reel 7 — the Understeering switch of external lighting 8 — the Lower overlay of a steering column 9 — the Steering shaft

Design of the steering drive without GUR

1 — the Tip of steering draft 2 — the Lock-nut 3 — the Collar of the protection cover 4 — the Protection cover 5 — the Collar of the protection cover 6 — Basic and press an element 7 — the Sealing ring 8 — Pruzhina 9 — the Adjusting stopper 10 — the Lock nut 11 — Steering draft 12 — the Persistent ring 13 — the Sealing ring 14 — the Lock ring 15 — the Gear wheel with the bearing 16 — the Directing plug 17 — the Gear lath

8 — the Lock nut 19 — the Boot 20 — the Lock ring 21 — the Tip of steering draft 22 — the Lock-nut 23 — the Collar of the protection cover 24 — the Protection cover 25 — the Collar of the protection cover 26 — Steering draft 27 — the Persistent ring 28 — the Left rubber support 29 — the Right rubber support 30 — the Case of the steering mechanism 31 — the Lock ring 32 — the Boot 33 — the Lock nut

GUR consists of the pump, the tank of GUR liquid and connecting from hoses. The pump is given to rotation from the engine through a V-shaped belt. The pump gives liquid from the tank under high pressure to the valve case located in the steering mechanism. The valve is connected with a steering shaft and gives oil depending on the direction of rotation of a steering wheel to the relevant party of the GUR working cylinder. Liquid influences the piston and, thus, facilitates process of turn of wheels. At the same time the piston squeezes out liquid on the other side of the working cylinder through the returnable hydraulic line in the tank.

The principle of action of EPS is as follows. Rotation of a steering wheel is registered the sensor of torque (3), the signal is transmitted to the EPS (5) control unit. From the VSS and ECM EPS control unit obtains information on the speed of the movement of the car. The EPS control unit counts the necessary size of effort which is created by the electric motor (1) and transfers to the steering mechanism (8). The size and the direction of auxiliary effort are defined by the size of current of the electric motor determined by the EPS control unit. Through the lower steering shaft (7) direct mechanical link between a steering wheel and the steering mechanism is carried out. Thus, at failure the EPS car remains operated. EPS works only at the working engine.

Design of the steering drive with the electric amplifier (the l DOHC 1.0 and 1.2 models)

1 — the Electric motor 2 — the Worm gear 3 — the torque Sensor 4 — the Signal from VSS	5 — the EPS Control unit 6 — the Signal of speed of a bent shaft from ECM 7 — Nizhny Novgorod a steering shaft 8 — the Steering mechanism

Often in the course of service of components of a suspension bracket it is necessary to face fixture resistant to an otdavaniye. By Prikipaniye of elements of fixture it is connected with the fact that they are constantly subject to external influences, are in contact with water, dirt, a soot and the other substances promoting corrosion development. For the purpose of simplification of the procedure of an otdavaniye of its such "stuck" fixture it is necessary to impregnate with plentiful amount of the getting oil beforehand. Cleaning of open carving parts of fixture a rigid wire brush also promotes simplification of an otdavaniye of the rusted nuts. Sometimes, in especially hard cases, for the otpuskaniye which "stuck" bolts/nuts it is possible to use a drift. The drift rests against the region a bolt nut/head vent, then sharp blows with the hammer are struck to its opposite end. You watch that the drift did not break, try not to damage inexact blows a carving. Quite effective way is also warming up of fixture resistant to an otdavaniye and a torch of the blowtorch or a gas torch surrounding it component surfaces though authors of this manual also do not recommend to resort without extreme need to such technology in view of its potential danger connected with a possibility of ignition and risk of receiving burns. Different extenders, collars and pipe nozzles on them are intended for increase in torque at an otpuskaniye of fixture. However, you remember that it is not necessary to use such intensifying devices complete with the drive equipped with "graggers" - the risk of failure of the ratchet mechanism is too high. Sometimes the nut/bolt begins to give in after it is previously slightly tightened clockwise. All fixture which otpuskaniye demanded application of extraordinary measures at assembly is subject to replacement!

After an otdavaniye attentively check a condition of fixture and in case of need you make its replacement with elements of the same standard size. At assembly tighten fixture of components of a suspension bracket and steering it is strict with the required effort.

Do not make attempts of a rikhtovka of the deformed components of a suspension bracket and steering at all - replace defective parts new!

As procedures of service of components of a suspension bracket are performed under the car, it is necessary to think in advance of opportunities of lifting the vehicle and its fixing in the lifted situation (prepare a reliable jack and props).

Do not perform any works under the car, the lifted situation fixed in only by means of a jack at all!

Precautionary measures

PERFORMANCE ORDER

The safety cushion is built in a stupichny part of a steering wheel. For a guarantee of serviceability of operation of a pillow at emergency collisions, and also in order to avoid risk of getting injured as a result of its casual activation it is necessary to observe certain precautionary measures (see also Head Onboard electric equipment): Before works with a safety cushion, or near a route of laying of an electrical wiring of SRS surely disconnect a negative wire of the battery, it is necessary to start performance of work not less than one minute later after a battery detachment, - time is necessary on a discharge of the condenser of the reserve power supply; Do not allow a safety cushion module warming up over 90 °C. Do not overturn the removed safety cushion module a slip down; Do not allow hit on the surface of the module of solvents and detergents, - for wiping of a steering wheel use only the pure, slightly humidified rags; The SRS control unit and modules of safety cushions are sensitive to the directed overloads (blows) and after falling from height more than 50 cm are subject to replacement; Before carrying out welding works on the car without fail disconnect an electrical wiring of the SRS control unit; On the models equipped with passenger safety cushions in order to avoid getting injured do not install any additional equipment and do not place any foreign objects in a zone of operation of pillows.