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Summary of Contents for Banjo M350 Series
- Page 1 POLY SELF-PRIMING CENTRIFUGAL PUMPS INSTRUCTION MANUAL 3″ M350 WET SEAL SERIES BANJO CORPORATION A Unit of IDEX Corporation 150 Banjo Drive, Crawfordsville, IN 47933 U.S.A. banjocorp.com | Telephone: (765) 362-7367...
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Page 2: Operation Warning
Do not restrict the pump inlet. High volume pumps such as the Banjo M350 Series pumps should not have the inlet port or line restricted. The pump should be plumbed with a 3" suction line. A 4" suction line may be used for better performance. Failure to follow these instructions can result in pump cavitation and pump failure. - Page 3 P E R FOR MANCE 3″ POLYPROPYLENE PUMPS Port Size Suction ......3″ MANIFOLD Discharge .......3″ MANIFOLD M350 STANDARD CURVE FOR MODELS: M350PE15W, M350PHAW, AND M350PBW M350PVAN14W ™ C O N N E C T W I T H C O N F I D E N C E...
- Page 4 DISASSEMBLY INSTRUCTIONS: Empty wet seal reservoir. 2A Insert spacer tool. Remove clamp guards on the pump. 2B Loosen the clamp. Remove bolts and lock washers on the back of the wet seal Remove the pump from the engine. reservoir. Remove the clamp from the shaft. Remove the key from the shaft.
- Page 5 DISASSEMBLY INSTRUCTIONS: Remove spacer on the engine (Briggs & Stratton Vanguard model Remove body bolts, lock washers, and nuts. ® only). Remove body from the rear bracket assembly. Remove the body O-ring from the groove on the rear bracket. Remove check valve from diffuser. Remove screws and diffuser.
- Page 6 D I SA S S E MBLY INSTRUC T I ON S: Remove impeller bolt. Remove the impeller from the shaft. If the impeller is stuck on the shaft, a 7/16-14 bolt may be screwed into the impeller bolt hole to remove the impeller.
- Page 7 D I S A S S E MBLY IN STRUCT I ON S: Remove O-ring from the groove on the back of the rear bracket. Remove lock washers and nuts from grooves in rear bracket. Remove the yellow spacer on back side of reservoir. Remove seal and shaft from reservoir and separate seal from shaft.
- Page 8 A S S E M B LY INST RU CTI ONS: TOOLS REQUIRED: 9/16", ½″ Box End Wrench, 9/16", ½" Socket, Ratchet with 6″ Extension, Locktite 242 and P80 lubricant Clean the new seals thoroughly and lubricate with P80 lubricant. Install the 2 ceramic seals into the reservoir and rear bracket.
- Page 9 A S S E M B LY INST RU CTI ONS: With the part number text on the rear bracket facing right side up, Install bolts into the back of the reservoir and tighten into the rear place the reservoir assembly onto the rear bracket with the shaft bracket.
- Page 10 AS S E M B LY IN STRUCTIONS: Install diffuser and tighten screws. Install check valve onto diffuser. Place the body O-ring into the groove on the rear bracket. Place body onto the rear bracket assembly ensuring the check valve groove is aligned correctly. If pump body is fully seated, body bolts will drop into place without resistance.
- Page 11 A S S E M B LY INST RU CTI ONS: Rotate the shaft so the keyway faces up and insert the key into the Attach clamp to the shaft of the pump but do not tighten beyond keyway on the shaft. finger-tight.
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Page 12: Troubleshooting Guide
Verify that the suction line does not have any vacuum leaks at any of the connections. f. Verify that the pump is operating at a minimum of 3450 RPM for lifting and self-priming applications. Banjo pump will not prime while operating below 1750 RPM. - Page 13 5. MOTOR RUNS BUT PUMP DOES NOT PERFORM ADEQUATELY. a. Verify that the pump is operating at a minimum of 1750 RPM. Banjo pumps may not operate below this RPM. b. Verify correct pump rotation if an electric motor or hydraulic motor is being used. A counter clockwise rotation (right hand rotation) is required from the motor.
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