Horizontal Split Case Pump Disassembly Video by Peerless Pump

Summary

This video provides a comprehensive guide to the maintenance and assembly of horizontal split-case pumps, emphasizing safety, proper techniques, and the importance of using OEM parts. It covers key steps such as disassembly, inspection, and reassembly, with specific instructions on handling components like bearings, impellers, shaft sleeves, and seals. The script stresses the need for certified technicians, detailed inspection, and proper replacement of worn parts to ensure optimal pump performance and longevity. It also includes guidance on spare parts, maintenance procedures, and product bulletins for accurate repair and service.

Takeaways

• 😀 Always use certified technicians for maintenance and repairs to ensure safety and reliability.
• 😀 Spare parts should be ordered using the pump size, serial number, and part numbers provided in the Peerless Pump bulletins.
• 😀 Do not reuse gaskets, o-rings, packing rings, or ball bearings to prevent pump failure.
• 😀 Keep a stock of critical spare parts like bearings, bearing seals, shaft sleeves, casing rings, and impeller rings for quick maintenance.
• 😀 Shut down the pump and disconnect power before starting any repair work to ensure safety.
• 😀 Disassemble the pump carefully by removing coupling halves, gland bolts, packing glands, and separating casing components using jack screws.
• 😀 When inspecting parts, check for damage like cracks, wear, or contamination (e.g., dirt or metal) to maintain pump performance.
• 😀 For shaft inspection, check for eccentricity using a dial indicator, ensuring it doesn't exceed 0.003 inches.
• 😀 Inspect impeller wear surfaces and casing rings for damage, and replace parts that are worn or defective to avoid inefficiency.
• 😀 When replacing impeller rings, ensure proper machining and installation using standard fits according to ANSI B 4.1 standards.
• 😀 Always refer to the product bulletins (4851938) for correct assembly and disassembly guidelines and measurements.

Q & A

Why is it important to use only certified technicians for pump maintenance and repair?

Certified technicians have the necessary expertise to safely perform maintenance and repair work, ensuring that the pump operates efficiently and minimizing the risk of further damage or safety hazards.

What information should be provided when ordering spare parts for a Peerless pump?

When ordering spare parts, you should provide the pump size and type (as noted on the nameplate), the pump serial number, the name and number of parts as shown in the sectional drawings, and the quantity required of each item.

Why is it recommended not to reuse gaskets, O-rings, packing rings, or ball bearings?

Reusing these parts can lead to poor sealing, increased wear, or failure of the components, which can affect the overall performance and longevity of the pump.

What spare parts should be stocked for efficient pump repairs?

It is recommended to stock bearings, bearing seals, bearing cover gaskets, shaft sleeves, sleeve O-rings, casing rings, impeller rings, casing gaskets, and a complete rotating element consisting of backing rings and packing for installations where downtime is critical.

What steps should be followed to safely shut down the pump before starting maintenance?

Shut down the pump, disconnect the power to the pump driver, and disengage the coupling halves before starting any repairs.

How should the coupling halves be removed during disassembly?

Remove the nuts from the gland bolts, remove the packing glands, and refer to the coupling manufacturer's instructions for proper guidance in disengaging the coupling halves.

What is the proper method for removing the impeller from the pump?

The impeller should be removed with an arbor press or a tube and hammer. Care should be taken to handle the interference between the impeller hub's inside diameter and the shaft's outside diameter, which should meet ANSI B 4.1 standards.

What should be checked when inspecting the bearing covers and gaskets?

Inspect the bearing covers and gaskets for any cracks, nicks, or tears. If any defects are found, they should be replaced immediately to maintain proper sealing and prevent leaks.

Why is it necessary to check the eccentricity of the shaft during inspection?

Checking the eccentricity ensures that the shaft is straight and not warped. Excessive eccentricity can lead to poor performance, excessive wear, and potential damage to other parts of the pump.

What is the significance of the impeller ring diametrical clearance in pump maintenance?

The impeller ring diametrical clearance ensures proper fit and sealing between the impeller and casing. If the measured clearance exceeds the specified limit, repairs or replacement of parts are necessary to restore the proper clearance and maintain pump efficiency.