March 21, 2019 Lada.Online 6 389 0
It is necessary to remove the steering wheel of a car in various cases, for example, to re-tighten its rim with leather or to dismantle subsequent parts. The article provides instructions on how to independently replace the steering wheel on a Lada Largus car.
Required
: Torx T50 wrench, two rods with a diameter of about 5 mm, a flat screwdriver, a new steering wheel mounting bolt (part number 8200686474) and disconnect the negative terminal from the battery (for at least 15 minutes to discharge the airbag capacitors).
Characteristics of power steering of Lada Largus
This unit is no less important than the brake system. The safety of the driver and passengers also depends on its performance. Power steering (hydraulic power steering) provides the ability to control the car by easily positioning the drive wheels in the desired direction.
The Lada Largus is equipped with a combined type hydraulic booster, i.e. some of its elements are located directly in the steering mechanism housing. In other words, they are a component of the mechanical part of the steering column. Power steering Lada Largus consists of a standard set of elements:
- tank;
- power steering pump, complemented by a working fluid bypass valve;
- pipelines;
- redistribution mechanism;
- working mechanism.
There are not many components, which explains the high reliability of the hydraulic booster. Malfunctions associated with its operation occur infrequently. Typically, problems arise due to violations of operating rules by the car owners themselves. Much less often - due to the natural wear and tear of parts, but, of course, one cannot ignore the low quality of components.
Maintenance comes down to following simple rules. The main thing is to regularly check the level of working fluid in the expansion tank of the system. The power steering does not require additional adjustments.
It's easy to check; just open the hood. The fluid in the system is also needed to lubricate the power steering elements. If the level is low, parts will begin to wear out too quickly. With such use, the unit is more likely to fail.
Removing the steering wheel and steering column cover of a Lada Largus car
We remove the steering wheel to replace it, as well as when removing the connector of the steering column switches, steering column or instrument panel
Disconnect the negative terminal of the battery
We wait 15 minutes for the airbag trigger capacitors to discharge
Set the steering wheel to a position corresponding to the straight-line movement of the car
We remove the driver's airbag module, to do this:
We simultaneously insert two rods into two special holes located on the sides of the steering wheel and compress the spring clamps securing the airbag module
At the same time, the assistant pulls the airbag module towards himself with his hands and moves it with the horn switch away from the steering wheel to the length of the wires
Location of spring clamps, airbag module mounting
Turn the steering wheel to the straight-line position of the car and use a screwdriver to pry up the clamp of the wiring harness block
Remove the retainer from the block
Disconnect the block from the airbag. Removing the airbag
Install the airbag after installing the steering wheel in the reverse order
Mark the position of the steering wheel hub relative to the shaft
Unscrew the steering wheel mounting bolt, holding the steering wheel from turning.
It is not necessary to completely unscrew the bolt to avoid injury when the steering wheel is abruptly disconnected from the steering shaft splines.
Using sharp blows of the hands along the axis of the steering shaft, we knock the steering wheel off the splined tip of the shaft
Completely unscrew the steering wheel mounting bolt
We remove the steering wheel hub from the shaft splines and bring out the wire with the airbag block through the hole in the hub.
And remove the steering wheel
In order not to damage the current-carrying bus of the airbag contact ring, we secure the ring from turning
To do this, insert a piece of thin plate into a special groove on the outer circumference of the ring. A section from a tie clamp works well for this.
Before installing the steering wheel, do not forget to remove the lock!
Install the steering wheel in reverse order.
Apply an anaerobic thread locker to the threads of the steering wheel mounting bolt. When installing the steering wheel, the bolt must be replaced.
Tighten the fastening bolt to a torque of 44 Nm.
Removing and installing the steering column cover
Unscrew the two casing mounting screws located on the bottom surface of the lower casing
Pull up and remove the upper part of the casing
Remove the right side of the lower part of the casing from the ignition switch
We remove the lock of the lower part of the casing from engagement with the instrument panel and remove the lower part
Install the casing in reverse order
Features of the Lada power steering device
The Largus steering mechanism is conventional, rack and pinion type. It is designed on the principle of a gear moving along a rack, but a hydraulic booster is used to ease the applied pressure on the steering wheel. A similar mechanism is common on most passenger cars. This is explained simply: the design consists of a minimum of parts, the efficiency of the power steering is high. Despite its reliability, the power steering mechanism cannot withstand constant movement over potholes and uneven road surfaces, hence the frequent occurrence of vibrations.
A pump with blades is installed on the power steering of Lada Largus, with the help of which it is possible to move oil in the power steering system. The vane pump is located on the engine, where it is mounted on a bracket and built into the timing drive, i.e. the pump blades are driven by the crankshaft drive poly-V belt. This means that you need to tighten the generator belt in a timely manner, although there is a special tensioner roller for this.
The steering mechanism drive structurally has two steering rods connected to the suspension steering knuckle arms at the front using hinge joints. Unlike other VAZ models, the Largus has a subframe on which the steering rack with power steering is mounted in the boot (on all other VAZ models the steering mechanism is mounted on the engine compartment panel).
During the startup of the power plant, the oil in the Largus power steering system moves from the tank through the pressure created by the pump to the distribution valve. When the wheel is turned in one direction or another, using this valve, one of the power steering cavities is connected to the tubes, and the other to the high pressure pipeline. The power steering piston is connected to the steering rack and drives the gear, as a result of which the rack also begins to move. The movement of the rack to the right or left causes the steering knuckles to turn, thus making a turn to the right or left.
Damage to the power steering does not particularly affect the ability to drive the car. The only drawback is the significant increase in effort when necessary to turn the steering wheel.
Steering wheel - removal and installation
Note: see the catalog number of the steering wheel here, see the mounting bolt here
Removal
Place the vehicle in the work station and apply the parking brake.
Lock the airbag computer using the diagnostic tool.
Turn off the ignition and disconnect the earth wire terminal from the battery.
Figure 2-1 — Removing the steering wheel:
1 — steering wheel; 2 — wiring harness of the steering column switch unit; 3 — steering wheel mounting bolt
Remove the driver air bag module (DIA).
Set the front wheels to a position corresponding to the straight-line movement of the vehicle.
Partially unscrew bolt 3, Figure 2-1, securing the steering wheel (replaceable Torx T50 attachment, extension and wrench).
Rocking to the sides, pull the steering wheel towards you, sliding it along the slots
completely unscrew the fastening screw
Carefully pass the harness of 2 wires of the steering column switch unit through the hole in the hub to the airbag module
and remove the steering wheel from the shaft.
Installation
Attention. Reuse of the bolt securing the steering wheel to the steering shaft is not permitted. The bolt must be replaced.
Make sure that the front wheels of the vehicle are in a position that allows the vehicle to move straight ahead.
Check and, if necessary, set the contact disk of the rotating unit of the steering column switches to the middle position.
Install the steering wheel onto the steering shaft. The steering wheel is installed so that the wide groove on the steering wheel hub 1 fits into the groove of the steering shaft. In this case, the narrower grooves 2 will align with the corresponding grooves on the steering shaft.
Secure the steering wheel with a new bolt. Bolt tightening torque 44 N.m (4.4 kgf.m) (replaceable Torx T50 nozzle, extension and wrench, torque wrench).
When installing the steering wheel, route the wiring harness of the steering column switch unit through the hole in the hub to the airbag module.
Install the driver air bag module (DIA).
Connect the ground terminal to the battery and turn on the ignition.
Unlock the airbag computer using the diagnostic tool.
Check the operation of the rotating unit of the steering column switches, for which:
— turn the steering wheel to the extreme left position;
— turn the steering wheel to the extreme right position;
— return the steering wheel to the central position;
— make sure that there is no fault message displayed on the instrument cluster.
Video
Factory oil and selection rules
Since the Lada Largus is actually an analogue of the Renault Logan, power steering oil from the French model is suitable for this car. In turn, this is confirmed by the manufacturer Largus.
What is recommended to use to replace power steering fluid on Lada Largus
| Conditions |
Brand
In addition to these brands of power steering fluid, the manufacturer recommends some analogues that are as close in their characteristics as possible to the original:
- Mobil ATF 220 or 320;
- Castrol ATF D2 or D3;
- Liqui Moly ATF 1100.
When changing power steering oil yourself, you should keep in mind that you should never mix fluid of different brands.
The result of such mixing will be foaming of the oil and, as a result, failure of the power steering. To replace, you must use the full volume of working fluid. Only compliance with such simple rules and recommendations for monitoring the oil level and choosing the right brand will ultimately lead to stable operation of the entire steering system as a whole. This way you can save money on expensive repairs, and also significantly reduce the risk of getting into an accident due to a faulty steering mechanism.
Removing and installing the front passenger airbag of a Lada Largus car
The front passenger airbag is located in the instrument panel on the passenger side and consists of a folded airbag shell and an inflator.
The passenger airbag module differs from the driver's airbag in shape and larger volume;
When installing a child seat in the front passenger seat, deactivate the passenger airbag.
To turn off the airbag, open the front passenger door and turn the switch to the “OFF” position.
To remove the cushion you need tools: Torx T30 wrench, 10mm socket head.
We prepare the car for the task and disconnect the negative terminal of the battery
Attempting to remove an airbag module without disconnecting its power supply may result in unexpected deployment of the airbag.
You can begin subsequent operations to remove the airbag only after the activator capacitor has completely discharged.
To do this, you must wait at least 15 minutes after turning off the power supply.
Do not disassemble the airbag module.
Do not drop the airbag module and do not allow water, grease or oil to come into contact with it.
The airbag module must not be exposed to temperatures above 95 °C.
We remove the instrument panel, as described in the article - How to remove the instrument panel of Lada Largus
Unscrew the four nuts securing the airbag module to the instrument panel
We remove the wiring harness from one holder
We remove the wiring harness from the other holder
Remove the wiring harness from the third holder on the panel
And remove the front passenger airbag module
Install the airbag module in reverse order
Removal
- Set the steering wheel straight.
- Squeeze the airbag module mounting clips while inserting the rods into the holes located on the sides of the steering wheel.
- Pull the airbag module along with the horn switch from the steering wheel towards you to the length of the wires connected to it.
- Disconnect the block with wires from the airbag module, first removing the clamp (pry it off with a screwdriver).
- Remove the airbag.
- Mark the position of the steering wheel hub relative to the shaft.
- Remove the steering wheel mounting bolt, holding the steering wheel from turning.
- Remove the steering wheel by pulling it towards you.
- When removing the steering wheel, carefully remove the wiring harness of the steering column switch unit to the airbag module through the hole in the hub.
To avoid damaging the current-carrying busbar of the airbag contact ring, secure the ring against rotation by inserting a piece of thin plate into a special groove.
We remove the steering wheel to replace it, as well as when removing the connector of the steering column switches, steering column or instrument panel
The driver's airbag is installed in the steering wheel
The airbag is secured to the steering wheel by two plastic hooks that engage two spring clips on the steering wheel.
If you turn the steering wheel assembly with the airbag over, you can see how it is attached (Figure 2)
Disconnect the negative terminal of the battery
We wait 15 minutes for the airbag trigger capacitors to discharge
Set the steering wheel to a position corresponding to the straight-line movement of the car
We remove the driver's airbag module, to do this:
We simultaneously insert two rods into two special holes located on the sides of the steering wheel and compress the spring clamps securing the airbag module
At the same time, the assistant pulls the airbag module towards himself with his hands and moves it with the horn switch away from the steering wheel to the length of the wires
(you can, of course, do this alone, but you will have to remove the hooks from the latches one by one)
Turn the steering wheel to the straight-line position of the car and use a screwdriver to pry up the clamp of the wiring harness block
Remove the retainer from the block
Disconnect the block from the airbag. Removing the airbag
The removed driver's airbag should be stored in a dry place without excessive heat with the cover facing up.
Install the airbag after installing the steering wheel in the reverse order
Mark the position of the steering wheel hub relative to the shaft
Unscrew the steering wheel mounting bolt, holding the steering wheel from turning.
It is not necessary to completely unscrew the bolt to avoid injury when the steering wheel is abruptly disconnected from the steering shaft splines.
Using sharp blows of the hands along the axis of the steering shaft, we knock the steering wheel off the splined tip of the shaft
Completely unscrew the steering wheel mounting bolt
We remove the steering wheel hub from the shaft splines and bring out the wire with the airbag block through the hole in the hub.
And remove the steering wheel
In order not to damage the current-carrying bus of the airbag contact ring, we secure the ring from turning
To do this, insert a piece of thin plate into a special groove on the outer circumference of the ring. A section from a tie clamp works well for this.
Before installing the steering wheel, do not forget to remove the lock!
Install the steering wheel in reverse order.
Apply an anaerobic thread locker to the threads of the steering wheel mounting bolt. When installing the steering wheel, the bolt must be replaced.
Tighten the fastening bolt to a torque of 44 Nm.
Attach the wire block to the airbag connector and insert the lock
We install the driver's airbag on the steering wheel so that the airbag hooks fit into the corresponding holes in the steering wheel and press the airbag until the airbag hooks snap into place with the steering wheel clamps.
Removing and installing the steering column cover
Unscrew the two casing mounting screws located on the bottom surface of the lower casing
Pull up and remove the upper part of the casing
Remove the right side of the lower part of the casing from the ignition switch
We remove the lock of the lower part of the casing from engagement with the instrument panel and remove the lower part
Install the casing in reverse order
