Steering pump mitsubishi 4m40 mb922703 mr267661

Types of Steering Pump Mitsubishi 4M40 MB922703 MR267661

The steering pump Mitsubishi 4M40 MB922703 MR267661 is a hydraulic power steering pump. The hydraulic power steering pump is further divided into the following subtypes.

• Vane Pump

  The steering pump uses vanes that glide in slots within a cylinder. The design of the cylinder is similar to an oval shape. The rotating action of the vanes in the slots creates a pumping action that moves the steering fluid. During the pumping process, the vanes of the steering pump push apart from each other, and the cylinder wall's inner surface slides over the adjacent vane. This action reduces the contact between the vanes and the cylinder wall, preventing the loss of fluid. In this type of steering pump, the number of vanes ranges from 2 to 6. Besides, the steering pump has a cam that helps to adjust the vane position during pumping.

• Gear Pump

  A gear pump comprises two interlocking gears housed in a steering fluid chamber. The design of the steering fluid chamber features inlet and outlet ports. Fluid enters the chamber through the inlet port, filling the space between the gears and the chamber wall. As the gears rotate, the steering fluid is displaced from the inlet port to the outlet port, creating fluid movement. The gear steering pump comes in two designs, which include the external and internal gear pumps. Both types of gear pumps have a slight difference in design. For instance, the external gear pump consists of two external gears that rotate against each other in the pump chamber. On the other hand, the internal gear pump has an external gear and an internal gear, with the latter being positioned in the external gear. The two gears of an internal gear pump rotate in opposite directions.

• Rotary Vane Pump

  The steering pump features a rotor located in an oval chamber with slots for the vanes. During the pumping process, the rotor turns in a circular motion while the vanes move in and out of the slots. This action allows the vanes to slide closer to the chamber wall and helps maintain a constant gap, eliminating the need for a cam. Besides, the rotary vane pump has a mechanism for automatically adjusting the vane to the chamber. The steering pump achieves this through a spring and follower design.

• Diaphragm Pump

  The steering fluid is moved through the driving action of a diaphragm, which divides the steering pump into two sections. One section of the pump contains steering fluid, while the other contains compressed air or gas. As the steering wheel is turned, the pressure on the fluid in the pump changes, causing the diaphragm to flex. This flexing action moves the fluid in the section with the steering fluid toward the appropriate channel, increasing or decreasing the fluid's pressure and volume.

Specification and Maintenance of Steering Pump Mitsubishi 4M40 MB922703 MR267661

• Fluid Quality

  Always use the recommended fluid for the steering pump. This fluid should meet the standards set by Mitsubishi for the specific model.

• Fluid Level

  Check the fluid level regularly. It should be at the level indicated in the owner's manual. Low fluid can cause pump damage, while high fluid can lead to overflow issues.

• Fluid Condition

  Inspect the fluid's condition. It should be clear to slightly tinted in color. If it looks dark or has debris, there might be a problem, and a professional should check it out.

• Hose and Connection Inspection

  Check all hoses and connections for leaks or damage. Even small cracks can lead to major pump issues over time. Replace any faulty parts right away.

• Visual Inspection

  A visual inspection involves checking the steering pump and its components for any visible signs of damage, wear, or leaks. This should be done regularly to catch any potential issues early on. Also, check other parts of the steering system, such as the reservoir and hoses, for similar problems.

• Listen for Unusual Noises

  Pay attention to unusual noises when using the steering wheel. Grinding, whining, or squealing sounds might indicate something is wrong with the pump or other steering parts. These sounds require immediate attention and should be investigated as soon as possible.

• Replace the Steering Fluid

  Over time, steering fluid can break down. Replacing it at intervals recommended in the owner's manual ensures the pump gets the best lubrication and protection. This is a simple and low-cost maintenance step that can significantly extend the life of the steering pump.

• Air Bleeding

  New fluids should be bled thoroughly to remove trapped air. Following the air bleeding procedure in the owner's manual is essential to ensure optimal steering performance and prevent damage to the pump from air contamination.

• Professional Inspection

  A professional mechanic should inspect the steering pump and system periodically. They have specialized tools and knowledge to diagnose potential issues accurately. In addition, they can also perform advanced maintenance services, such as flushing the steering system if needed.

How to choose steering pump Mitsubishi 4M40 MB922703 MR267661

Wholesale buyers should consider several factors when choosing steering pumps to ensure they meet business needs and customer requirements.

• Vehicle Compatibility

  To ensure the steering pump matches the intended installation, it should be checked whether it is compatible with the Mitsubishi 4M40 engine and vehicle models.

• Flow Rate and Pressure

  The steering system requires a specific flow rate and pressure. Steering pumps are preferred to be selected based on the desired pressure and flow rate specifications to ensure compatibility and optimal performance.

• Quality and Reliability

  Quality and reliability are important for steering pumps. It is advisable to prefer well-known brands, high-quality products, and steering pumps that provide durability and reliability.

• Condition

  It is decided according to the needs of the target customers and the business strategy whether to offer new, remanufactured, or used steering pumps.

• Warranty and After-Sales Support

  It should be evaluated whether the steering pump supplier offers a warranty and whether there is adequate after-sales support. Warranty and after-sales support are important for product reliability and business continuity.

• Price

  Price should be compared with other alternatives, and additional costs such as shipping and customs duties should be considered. A competitive price is important for profitability, but quality and performance should not be compromised.

How to DIY and Replace Steering Pump Mitsubishi 4M40 MB922703 MR267661

DIY replacement of the steering pump Mitsubishi 4M40 MB922703 MR267661 can be achievable with the right tools, steering pump, and skills. Here's a step-by-step guide:

Gather the necessary tools. These might include:

• Wrenches
• Ratchet and socket set
• Torx bit set
• Power steering fluid
• Pump pulley puller and installer (if required)
• Clean rag
• Safety glasses
• Gloves

Remove the drive belt that powers the steering pump. Depending on the vehicle's design, this may require loosening a tensioner pulley.

Disconnect the fluid hoses from the steering pump. Be prepared for some power steering fluid to leak out. Use a clean rag to catch any spills and to keep the work area clean.

Unbolt the steering pump using the appropriate wrench or socket. It will typically be held in place with bolts that can be removed from the engine bay.

Lift the old pump out and place the new pump in the steering pump assembly. Before installing the new pump, ensure it is properly aligned with the drive belt and that all mounting surfaces are clean.

Reconnect the fluid hoses to the new pump, ensuring they are tightened securely to prevent leaks. Refer to the vehicle's service manual for the correct torque specifications.

Reinstall the drive belt, ensuring it is properly tensioned. The tension can be adjusted by loosening the tensioner pulley and tightening the pulley bolt to the required tension.

Fill the power steering fluid reservoir with fresh fluid. Consult the owner's manual for the correct type and specifications of the fluid to use. Be sure to use only the recommended fluid, as using the wrong type can damage the pump or other steering system components.

After filling the reservoir, start the engine and turn the steering wheel lock to lock a few times to bleed any air out of the system. Check for leaks around the pump and hoses, and tighten any connections as necessary. It may take a few minutes for the fluid to circulate through the system, so be patient and continue to check for leaks until the system is fully bled.

Lower the vehicle and test the steering to ensure it is functioning correctly. If the steering is still stiff or unresponsive, there may be air trapped in the system or a problem with the new pump. Consult a professional mechanic for further diagnosis and repair.

Dispose of the old pump and any spilled fluid per local regulations. Many communities have recycling programs for used automotive parts and fluids, so be sure to dispose of everything responsibly.

Overall, replacing a steering pump is a relatively straightforward task that can be accomplished with basic mechanical skills and tools. Following the above steps and taking your time ensures a successful and trouble-free steering system operation.

Q and A

Q1: Can a steering pump be repaired?

A1: Yes, a steering pump can be repaired. However, it is more cost-effective to replace the pump. Repairing the pump can be tedious since the parts that get damaged are usually non-removable.

Q2: How long does a steering pump last?

A2: A steering pump can last between 100,000 to 200,000 kilometers. The lifespan is influenced by the type of fluid used and the quality of the steering pump.

Q3: What are the signs of a failing steering pump?

A3: A low steering pump pressure causes steering difficulty. An audible noise like a grinding or whining sound when steering is another sign. In severe cases, there's an odor from the pump, which is a clear indication that the pump is faulty. The last sign is visible leakage from the pump.