Trillium WSP-6, Installation, Operation & Maintenance Instructions Manual, Page: 19 / 73

WSP™
DATA SHEET WSP™ SELF-PRIMER PUMPS WSP-D300_6
Rev. 3 01/09/20
© 2019 The Factory
19
Figure 1
Disengage the hardware to remove the wearplate then inspect it and replace if it is
badly gouged or worn.
Carefully inspect the O-rings in the back cover and replace if worn or damaged.
B. REMOVING THE SUCTION CHECK VALVE
Remove the check valve pin. Pull the complete assembly from the suction flange by
reaching through the back cover opening. Once this is completed, service, inspect
and replace the check valve assembly.
NOTE:
Additional check value disassembly is not needed. It must be replaced as a
complete unit since individual parts are not sold separately.
C. REMOVING THE ROTATING ASSEMBLY
To service the rotating assembly without disconnecting the suction or discharge
piping, remove the power source. This will provide clearance for servicing.
To prevent seal cavity oil from escaping when the impeller is loosened, remove the
seal cavity drain plug, and drain the oil in the seal cavity before loosening the
impeller.
With the rotating assembly still attached to the pump casing, loosen the impeller.
When done, clean, inspect and reinstall the drain plug in the seal cavity.
Wedge a block of wood between the impeller vanes and the pump casing prior to
removing the impeller capscrew and washer.
Install the impeller shaft key before installing a lathe dog on the drive end of the
shaft. When installing the lathe dog, be sure the “V” notch is positioned over the
shaft key.