MTHTrains M50 SERIES Instruction Manual

onto the shaft. The bushing should be oriented such that the end with the screw is further from the motor and the screw head fi ts into the slot in the right channel ring. Refer to Figure 4-17. This completes one stage; a stage consists of one Left Hand Channel Ring (#10), a Right Hand Channel Ring (#9), and an Impeller (#11) between them. Refer to Figure 4-12. 18. Install another Left Hand Channel Ring (#10). a. Install an Impeller Key (#23) in the shaft. b. Place an “O”Ring (#7) on the raised step in the channel ring. Lubricate the “O ...

nearest the motor, except on Model M51 - in which case it is farthest form the motor. The discharge or “outlet” can be on the top, side, or bottom depending on the model and construction of the pump. Normal discharge position is located on top in horizontal confi gurations, or in line with vertically mounted confi gurations. 3C Foreign Material All regenerative turbine pumps have close running clearances in order to maintain effi ciency. Take extra precautions to insure that no foreign material larger than 25 microns or .001 inches is all ...

and reused. It is recommended that a new rotating element be used for reassembly. DO NOT attempt to remove the seal using a screwdriver or other sharp object. Extensive damage to the shaft or element could occur. 20. On inducer pumps (L50 Series), the Seal Driver (#88) can be removed from the shaft if it needs to be replaced. 21. Remove the Seal Stationary Seat (#125). Refer to Figure 4-10. (#125). Refer to Figure 4-10. Page 510 Figure 4-8 Figure 4-7 Figure 4-7 b. Remove the Inducer Impeller (#11IN) from the shaft. The snap ring on the other end of the impe ...

88 8 125 23 17 17 7 P3 Bearing Pedestal P3 Bearing Pedestal C3 Motors 1/3 to 3 HP L50 (Inducer) Stage 12 23A 11 IN 7A 7A 7A 14 15 15 20 Guide Rod “O”rings (#8) must be removed. a. Gently tap on the back of the inlet cover, alternating between the left and right side, until the Inlet Cover moves approximately 1/4”. b. Tap the inlet cover face to move it back to its original position, exposing the Guide Rod “O”rings. c. Remove the “O”rings by sliding them off the Guide Rods. d. Slide the Inlet Cover straight off. Do not attempt to remove the Inle ...

Figure 4-24 P3 Bearing Pedestal 30 23 17 24 4 21 3 33 24A 2. Place the shaft with either bearing resting on top of the jaws and gently tap on the end of the shaft until the bearing is removed. Refer to Figure 4-23. P3 P30 I.D. 1” 1 5/16” - 1 1/2” O.D. 2” 2 3/4” - 3” 3. Repeat step 2 to remove the other bearing. Good support used on the inner races will prevent bearing damage. 4C Disassembly (P30) Disassemble pump components as shown in Section 4, M50 • L50 PUMP ENDS, 4E Disassembly Multistage on C30 Motors / P30 Bearing Frames. The ...

Troubleshooting FLEXIBLE COUPLED PUMPS CLOSE COUPLED PUMPS A. Failure to Pump B. Reduced Capacity C. Reduced Pressure D. Pump Loses Prime After Starting E. Excessive Power Consumption F. Pump Vibrates or is Noisy G. Mechanical Problems H. Seal Leakage 5A Failure to Pump 1. Pump not up to speed — Use Tachometer to determine actual RPM. Check voltage and wiring connections. 2. Pump not primed — Confi rm that pump and all inlet piping are fi lled with fl uid. 3. Discharge head too high — Install a pressure gauge at the pump discharge to determine the actua ...