Download Volvo EC35C Compact Excavator Workshop Service Manual –

Repairing the power steering system on a Volvo EC35C Compact Excavator involves several steps. click here for more details on the download manual…..

Below is a detailed guide on how to perform this repair, including descriptions of the components involved.

### Components of the Power Steering System

1. **Power Steering Pump**: This component provides hydraulic pressure to the steering system. It is typically belt-driven from the engine.

2. **Power Steering Fluid Reservoir**: This tank holds the hydraulic fluid used in the steering system. It usually has a dipstick or a sight glass for checking fluid levels.

3. **Hydraulic Lines**: These hoses and tubes carry hydraulic fluid between the power steering pump, the steering gear, and the reservoir.

4. **Steering Gear (or Rack and Pinion)**: This component translates the rotational motion of the steering wheel into linear motion to turn the wheels.

5. **Steering Wheel**: The driver’s input device that provides manual control over the steering system.

6. **Steering Column**: Connects the steering wheel to the steering gear and may include universal joints for flexibility.

7. **Power Steering Fluid**: The hydraulic fluid that transmits power within the system. It’s crucial to use the correct type of fluid specified by the manufacturer.

### Tools and Materials Needed

– Hydraulic fluid (specific to Volvo EC35C)
– Wrenches and sockets
– Screwdrivers
– Pliers
– Hose clamps
– Towels/rags for cleanup
– A container for draining old fluid
– New hydraulic hoses (if needed)
– Replacement power steering pump (if necessary)
– torque wrench
– Safety gloves and goggles

### Step-by-Step Repair Process

#### 1. Safety Precautions
– Ensure the excavator is on a flat surface and turned off.
– Engage the parking brake.
– Wear safety gloves and goggles to protect yourself from hydraulic fluid.

#### 2. inspect the Power Steering System
– **Check Fluid Level**: open the power steering fluid reservoir and check the fluid level. If it’s low, top it off with the correct fluid.
– **Look for Leaks**: inspect hydraulic lines, the power steering pump, and the steering gear for any signs of leaks.

#### 3. Drain the Power Steering Fluid
– Place a container under the power steering fluid reservoir.
– Disconnect the return line from the reservoir and allow the fluid to drain completely.

#### 4. Remove the Power Steering Pump
– **Locate the Pump**: The power steering pump is typically mounted on the engine.
– **Disconnect Hoses**: Use wrenches to disconnect the high-pressure and return hoses from the pump.
– **Remove the Pump**: Unbolt the pump from its mounting using the appropriate socket and remove it from the engine.

#### 5. inspect and Replace the Power Steering Pump (if necessary)
– If the pump is damaged or not functioning properly, replace it with a new unit.
– Ensure the new pump is compatible with the Volvo EC35C specifications.

#### 6. Replace Hydraulic Hoses (if necessary)
– If any hoses are worn or leaking, replace them.
– Use the correct type download Volvo EC35C Compact Excavator workshop manual and size of hoses to ensure proper fit and function.

#### 7. Reinstall the Power Steering Pump
– Position the new or repaired pump back in its mounting location.
– Bolt it in place and reconnect the high-pressure and return hoses, ensuring they are tightly secured.

#### 8. Refill Power Steering Fluid
– Reconnect the return line to the reservoir.
– Fill the reservoir with the correct type of power steering fluid up to the indicated level.

#### 9. Bleed the Power Steering System
– Start the engine and let it idle.
– Turn the steering wheel from lock to lock several times to help purge any air from the system.
– Check the fluid level again and top off if necessary.

#### 10. Test the System
– With the engine still running, check for any leaks around the pump, hoses, and reservoir.
– Test drive the excavator to ensure the steering is responsive and there are no unusual noises.

#### 11. Clean Up
– Dispose of the old hydraulic fluid and any debris in accordance with local regulations.
– Clean any spills and ensure all tools are accounted for.

### Conclusion
Repairing the power steering on a Volvo EC35C Compact Excavator requires attention to detail and a methodical approach. By following the steps above and ensuring that you use the correct parts and fluids, you can successfully repair the power steering system and maintain the performance of your excavator. If you encounter persistent issues, it may be best to consult with a professional mechanic or technician.
The power steering pump pulley is a crucial component in a vehicle’s power steering system, designed to facilitate the smooth and effortless steering of the vehicle. Typically made from materials like aluminum or plastic, the pulley is a circular device that connects to the power steering pump via a belt. The primary function of the power steering pump is to generate hydraulic pressure that assists the driver in turning the steering wheel, especially at low speeds or during parking maneuvers.

When the engine runs, the crankshaft rotates the drive belt, which in turn spins the power steering pump pulley. This rotation powers the pump, which pushes hydraulic fluid through the system. The hydraulic fluid aids in moving the steering gear, reducing the effort required by the driver to turn the wheel.

The efficiency of the power steering system heavily relies on the condition of the power steering pump pulley. If the pulley becomes worn or damaged, it can lead to belt slippage, reduced hydraulic pressure, and ultimately, less effective steering assistance. In some cases, a faulty pulley can generate noise or vibrations that indicate a problem. Regular maintenance checks are essential to ensure that the pulley and the entire power steering system function optimally, providing safe and responsive steering performance for the vehicle.