Trillium WSP-6, Installation, Operation & Maintenance Instructions Manual, Page: 35 / 73

WSP™
DATA SHEET WSP™ SELF-PRIMER PUMPS WSP-D300_6
Rev. 3 01/09/20
© 2019 The Factory
35
While the wearplate is barely touching the impeller, turn the 2 hand adjusting knobs
in the back coverplate until they touch the pump casing.
Loosen the two hand nuts two full turns.
Tighten both hand adjusting knobs evenly 1/3 turn then evenly tighten the 2
diagonally positioned hand nuts to push the back cover into the pump casing. Now,
hand-turn the shaft to be sure there is no binding or interference between the
impeller and the wearplate.
When no binding or interference is noted, install and tighten the 2 remaining hand
nuts.
Should you notice friction or binding between the wearplate and the impeller, re-
execute the entire adjustment process using an additional ¼ clockwise adjustment of
the 2 hand adjustment knobs.
NOTE:
Be sure to tighten both the hand nuts and hand adjusting knobs evenly to
eliminate binding.
The adjustment procedure may need to be repeated from time to time in order to
remedy the standard sear between the wearplate and the impeller. When this occurs
and all available adjustment on the back cover side of the pump has been used, you
may make an additional 0.125-inch adjustment by removing the adjusting shims on
the rotating assembly.
The installed pump must be totally cooled down prior to draining liquid from the pump
casing. Once cool, remove the back cover and the adjusting shims from the rotating
assembly. When this is complete, reinstall the attaching hardware for the rotating
assembly to the pump casing, and complete the back cover adjustment procedure
noted above to obtain adequate face clearance.
V.
MAINTAINING THE PRESSURE RELIEF VALVE
A pressure relief valve is provided for additional safety to the pump and its operator.
It is located on the pump casing (Refer to Liquid Temperature & Overheating in
Section IX. OPERATION, Part C. 4 of the instructions).
WSP™ recommends replacing the pressure relief valve assembly during every
scheduled major maintenance operation or any time the pump overheats, causing
the valve to activate.
Never
replace the pressure relief valve with a non-approved
substitute. It
must be
an approved replacement unit from Weir Specialty Pumps.
Remove, inspect and clean the pressure relief valve regularly. When the inspection
and cleaning are completed. apply
Loctite Pipe Sealant with Teflon No. 592
or an
equivalent product on the relief valve threads before reinstalling in the pump.