How to Rebuild Saginaw Power Steering Pump: Expert Tips Revealed!

The Saginaw power steering pump is a common component in many vehicles, but like any mechanical part, it can wear out over time. When your power steering pump starts to whine, leak, or fail to provide assistance, it’s time to consider a rebuild. This guide will walk you through the process of rebuilding a Saginaw power steering pump, empowering you to tackle this task yourself and save money.

Understanding the Saginaw Power Steering Pump

Before diving into the rebuild process, let’s understand what makes a Saginaw power steering pump tick. These pumps are known for their robust design and relatively simple construction. They consist of a few key components:

• Pump Housing: The main body of the pump that houses all the moving parts.
• Rotor: A rotating shaft with vanes that displace fluid and create pressure.
• Valve Plate: A stationary plate with ports that control fluid flow.
• Vanes: These are attached to the rotor and slide within the pump housing, creating the pressure that assists steering.
• Bearing: Supports the rotor shaft and ensures smooth operation.
• Seal: Prevents fluid leaks from the pump.

Assessing the Need for a Rebuild

Before committing to a rebuild, it’s crucial to assess the condition of your power steering pump. Here are some common signs that indicate a rebuild might be necessary:

• Whining noise: A high-pitched whine, especially when turning the steering wheel, is a telltale sign of worn bearings or internal pump components.
• Fluid leaks: Fluid leaking from the pump or its associated lines is a clear indication of a seal failure.
• Stiff steering: If your steering feels heavy and requires excessive effort, the pump may not be generating enough pressure.
• Power steering failure: If your power steering completely fails, it’s a strong indicator of a serious problem within the pump.

Gathering the Necessary Tools and Supplies

To successfully rebuild your Saginaw power steering pump, you’ll need the following tools and supplies:

• Power steering pump rebuild kit: This kit typically includes new seals, bearings, vanes, and other essential components.
• Torque wrench: To tighten bolts to the correct specifications.
• Socket set: For removing and installing bolts.
• Wrench set: For loosening and tightening nuts and bolts.
• Pliers: For gripping and holding small parts.
• Screwdrivers: For removing screws and other fasteners.
• Clean rags: For wiping away debris and cleaning parts.
• Shop towels: For absorbing spills and cleaning up the work area.
• Safety glasses: To protect your eyes from debris and chemicals.
• Gloves: To protect your hands from grease and fluids.
• Power steering fluid: For refilling the system after the rebuild.

Disassembling the Saginaw Power Steering Pump

Now that you have your tools and supplies ready, it’s time to disassemble the pump carefully. Here’s a step-by-step guide:

1. Remove the pump from the vehicle: This may involve disconnecting hoses, removing mounting bolts, and disconnecting electrical connections.
2. Drain the power steering fluid: Before disassembling the pump, drain the fluid to prevent spills and contamination.
3. Remove the pulley: Using a puller or a socket wrench, carefully remove the pulley from the pump shaft.
4. Remove the valve plate: The valve plate is typically held in place by screws. Remove these screws and carefully separate the valve plate from the pump housing.
5. Remove the rotor: The rotor may be held in place by a retaining nut or a snap ring. Remove these components to release the rotor.
6. Remove the bearings: The bearings are typically pressed into the housing and may require a bearing puller for removal.

Inspecting and Cleaning the Parts

Once you’ve disassembled the pump, it’s crucial to inspect each part for wear, damage, or corrosion. Replace any components that show signs of deterioration.

1. Inspect the pump housing: Check for cracks, scratches, or other damage.
2. Inspect the rotor: Look for wear on the vanes and the shaft.
3. Inspect the valve plate: Ensure the ports are clear and free of debris.
4. Inspect the bearings: Check for wear, damage, or signs of rust.
5. Inspect the seals: Look for tears, cracks, or hardening.

After inspecting the parts, clean them thoroughly using a parts cleaner or a mixture of soap and water. Be sure to rinse all parts thoroughly to remove any residual cleaning solution.

Reassembling the Saginaw Power Steering Pump

With the parts cleaned and inspected, you’re ready to reassemble the pump. Follow these steps:

1. Install the bearings: Press the bearings into the pump housing, ensuring they are seated correctly.
2. Install the rotor: Insert the rotor into the pump housing, aligning it with the shaft.
3. Install the valve plate: Place the valve plate onto the pump housing, aligning the ports with the corresponding passages.
4. Install the pulley: Use a puller or a socket wrench to install the pulley onto the pump shaft.
5. Install the seals: Replace the old seals with new ones from your rebuild kit.
6. Tighten all fasteners: Use a torque wrench to tighten all fasteners to the manufacturer’s specifications.

Refilling and Testing the System

After reassembling the pump, you’ll need to refill the power steering system with fresh fluid.

1. Connect the hoses: Connect the power steering hoses to the pump.
2. Fill the reservoir: Add the recommended type of power steering fluid to the reservoir.
3. Start the engine: Start the engine and turn the steering wheel from lock to lock several times.
4. Check for leaks: Inspect the pump and hoses for any leaks.
5. Top off the fluid: Add more fluid if necessary.

Once you’ve refilled and tested the system, you should have a fully functional power steering pump.

Final Thoughts: A Successful Rebuild

Rebuilding a Saginaw power steering pump can be a rewarding and cost-effective solution compared to buying a new pump. By carefully following the steps outlined in this guide, you can confidently tackle this task and restore your vehicle’s power steering system to its former glory.

What You Need to Know

Q: How often should I rebuild my power steering pump?

A: There’s no set timeframe for rebuilding a power steering pump. It depends on factors like driving conditions, fluid quality, and maintenance. However, if you notice any signs of wear or failure, it’s time to consider a rebuild.

Q: What type of power steering fluid should I use?

A: Refer to your vehicle’s owner’s manual for the recommended type of power steering fluid. Using the wrong fluid can damage the pump.

Q: Can I use a power steering pump rebuild kit from a different manufacturer?

A: It’s best to use a rebuild kit specifically designed for your Saginaw power steering pump model. Using a kit from a different manufacturer may not have the correct parts or fit properly.

Q: What should I do if I encounter problems during the rebuild?

A: If you encounter any difficulties, consult a qualified mechanic or refer to a repair manual for your specific vehicle model.