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Before making a decision to repair or replace parts of power steering or electro-hydraulic power steering, it is necessary to diagnose the vehicle.
STEERING REPAIR WORKFLOW
Rupture of the intake pipe – it is not associated with a violation of the repair technology and is not a manufacturing defect of the manufacturer. The damage occurs when the owner of the car attempts to repair the pump himself. As a consequence of that it leads to breakage of supply pipe.
2. Another attempt to repair the power steering pump in a garage conditions.
Lack of tightness in seating areas of the pump, which leads to leakage of hydraulic fluid. Due to uneven sealing of the o-ring. High leakage of ATF fluid from pump indicates damage to o-ring during installation. 3.
3. noise made by pump at idle.
Rotor end jamming,
4. noise made by pump at idle stroke.
4. 4. Rotor face or eccentric ring jamming due to overpressure will result in poor pump performance and noise.
5. Steering gear noise.
Displacement of the dust cap when attaching the steering column to the valve body
catching of the dust cap in the valve body,
deformed piping is pressed against the steering mechanism crankcase.
6. Stuck steering mechanism.
Tearing of valve body threads due to assembly error,
severe damage by contamination of the steering mechanism valve,
Contamination in the fluid circulation system,
due to the process of wear and tear during the operation of the car by the customer,
Due to poor quality repair at the car service center.
7. Breakdown of Servotronic electro-hydraulic converter connector.
error in installation of the cardan joint of the steering bipod shaft,
Difficulties of steering movement also cause failure of Servotronic device.
8. Loose or improperly installed hose clamps.
errors in the installation of the unit at the service station,
This defect causes water and contaminants to get into the steering mechanism actuator.
9. Not tightness in the steering gear actuator.
Careless handling or maintenance of the vehicle,
Damage to the steering mechanism with a tool when replacing the steering link rod. Impact damage to piston rod.
10. Knocking when turning.
The steering linkage actuator is poorly secured,
Insufficient tightening torque of fixing bolts,
Sudden overloading of the steering mechanism,
Damage of elastic rubber-metal element,
The thread of the steel bushing has been pressed through.
All of the above defects indicate the need to repair the steering mechanism with the replacement of some parts.
Before starting the work, do not forget to fix the car securely. Fix the steering mechanism and fix it in the position – straight motion. Fix the steering wheel in the same position. The wheels must also be in straight position.
Connect the hydraulic lines.
Do not mix up hoses.
Start to adjust front axle camber.
Tightening torque of steering mechanisms and parts must comply with vehicle manufacturer’s specifications.
Servicing steering with hydraulic or electro-hydraulic power steering.
Always change the oil filter or the entire oil reservoir (if present or provided by the manufacturer) each time you replace their components and assemblies.
REPLACING THE HYDRAULIC PUMP.
Removing the power hydraulic pump:
drain hydraulic fluid,
remove the hydraulic lines,
close the open ends of the pipes, i.e. protect them from dirt, cover them with special plugs,
loosen the pump drive belt,
remove the pump (if necessary, mark original position of the pulley before disassembly).
if necessary, reinstall the pulley, then the hydraulic pump.
install the pump drive belt and adjust its tension,
fill the pump itself with oil, observing the fluid type according to the requirements of the vehicle manufacturers,
connect the hydraulic lines, observing the correspondence of the supply and return lines to their places,
strictly observe the tightening torque of all fasteners,
fill the steering system with oil, observing the fluid brand according to the requirements of the vehicle manufacturer (with the engine off!)
deflate the system,
when deflating the system the front axle of the vehicle must be raised. Turn the steering wheel several times from stop to stop, until all bubbles come out of the oil reservoir,
top up to the maximum mark. Final refilling is performed with the engine running,
Once again check the level of hydraulic fluid,
Check the level of hydraulic fluid again with the engine on,
Check the total number of turns of the steering wheel – the same number of turns, right and left.
Quality control of the work performed.
Check the quality of work on the steering rack in the car is checked in slow motion. Smoothly start driving at 20 km/h and slightly turn and release the steering wheel. If the work is done correctly, the steering wheel should return to its original position.
Functionality of the Servotronic power steering:
checked in position with the torque plug mounted on the steering wheel. Turn the steering wheel about one turn to make sure that this is done with relatively little force.
repeat the test with the plug removed. In this case, the same one turn is done with significantly more force. This test definitively confirms that the unit has been replaced in full compliance with technical regulations.