EBARA 2 CDX - Manual (Page 14)

Model CDU, CDX, 2CDU, 2CDX Ebara End Suction Centrifugal / Two-stage Centrifugal
instructions and Operation
Ebara Fluid Handling
www.pumpsebara.com 14
(t) 803 327-5005 • (f) 803 327-5097 rev. 12/10
Service
Keep ventilation openings clear of extraneous objects which may hinder free flow of air thru motor. Motor bearings are lubricated
during manufacture. additional lubrication is not required during their normal lifetime.
Maintenance
Disassembly instructions – CDU, CDX, 2CDU, 2CDX
all pumping parts can be removed from case without disturbing the piping.
POWEr SUPPLY – Open the power supply switch contacts and remove fuses. Disconnect the electrical wiring from the motor.
VOLUTE CaSE
(a) Drain pump case by removing drain plugs.
(b) remove the bolts securing volute case to pump bracket.
(c) Pry volute case from casing cover with a screwdriver.
IMPELLEr
CDU – Hold the motor shaft with a screwdriver in the shaft end slot. remove the impeller nut. Grasp and turn the impeller
counterclockwise (as viewed from pump end).
CDX, 2CDX, 2CDU – Hold the motor shaft with a screwdriver in the shaft end slot. Use a wrench to remove the impeller nut.
Slide impellers from the shaft.
SEaL
(a) remove the rotating part of the seal by pulling it off the shaft.
(b) The stationary seat can be pressed from the casing cover.
CHECK LIST FOR EXAMINATION OF PUMP PARTS
IMPELLEr - replace the impeller if any vane is broken, excessive erosion shows, or if labyrinth surfaces are worn. Impeller
nut should be replaced if damaged.
MECHaNICaL SEaL - Seal face, O-ring and sealing members should be free of burrs and dirt. Complete seal assembly
should be replaced if not in perfect condition.
SHaFT- Shaft surface under seal must be clean, smooth and without any grooves. It should be replaced if necessary.
VOLUTE aND SEaL PLaTE LabYrINTH SUrFaCES (Wear rings)- If worn, replace the necessary part. If furnished with
pressed in wear rings, only the rings need be replaced.
NOTE
If replacement parts are ordered, please furnish the following information to your Ebara distributor:
1. reference Numbers
2. Description of Pump Part
3. Ebara Model Number and Serial Number on the Nameplate.
Warning
CaUTiOn
Draining
The pump and piping should always be protected against freezing temperatures. If there is any danger of freezing, the unit
should be drained. To drain the pump, remove the drain plug at the bottom of the volute, and remove the priming plug to
vent the pump. Drain all piping.