Thrush 3500 RPM - Manual (Page 7)

10. Press casing wear ring (39) in casing if change is necessary. Rings should not be
hammered into place. Use a press or clamp the parts in a bench vise using wooden
blocks to protect the rings. It may be necessary to pin or dowel the rings after assembly
if the insert or casing had rings replaced before since each re-assembly can stretch or
tear metal and thereby loosens the fit. If the facility is available it is good practice to take
a very light finish out or to ream the inside diameter of the casing rings after pressing to
restore roundness. When rings are pressed they may get squeezed out of shape.
11. Replace bracket wear ring (16) in bracket (15), if applicable.
12. Carefully place sleeve gasket (23) on motor end of impeller. Assemble impeller key (14)
and impeller (37) to shaft. Secure impeller with impeller washer gasket (33), washer (34
& 36) and impeller bolt (35).
13. Replace casing gasket (27) on bracket (15). Slide entire bearing frame-bracket assembly
into casing (28) being careful not to damage casing gasket (27). With assembly properly
positioned in casing (28) replace capscrews (30). Turn all capscrews in and tighten
evenly. Replace all hold down bolts securing pump assembly to base.
14. Install the two pipe plugs (29) in the pump casing. Position the casing gasket (27) and
casing (28) against the pump bracket and secure with capscrews (30).
15. Replace all relief cooling, flushing or drain lines.
16. Read carefully the selection of the manual titled – INSTALLATION, especially those
paragraphs referring to pump and coupling alignment.
17. Connect electricity to the motor.
18. Lubricate bearings.
19. Open suction and discharge valves.
SERVICE
The THRUSH pump requires no maintenance other than periodic inspection, occasional cleaning
and lubrication of bearings. The intent of inspection is to prevent breakdown, thus obtaining
optimum service life. The liquid end of the pump is lubricated by the fluid being pumped and
therefore does not require periodic lubrication. The motor, however, may require lubrication, in
which case, the motor manufacturer’s recommendation should be followed.
LUBRICATION OF IMPELLER SHAFT BEARINGS
The base mounted end suction pump is available with two options for lubricating the shaft
bearings. They are:
1. Re-greasable (standard)
2. Oil Lubrication
REGREASABLE bearings will require periodic lubrication. This can be accomplished by using
the lubrication fittings in the cartridge cap and power frame. Lubricate the bearings at regular
intervals using a grease of high quality. Lime, lithium, lithium soda or calcium base grease is
recommended as lubricants for pumps operating in both wet and dry locations. Mixing of different
brands of grease should be avoided due to possible chemical reaction between the brands, which
could damage the bearings. Accordingly, avoid grease of vegetable or animal base (which can
develop acids) as well as, grease containing rosin, graphite, talc and other impurities. Under no
circumstance should used grease be reused.