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PAGE 20 —ST2010 SERIES SUBMERSIBLE PUMP • OPERATION AND PARTS MANUAL — REV. #3 (12/07/12)
MAINTENANCE
LUBRICATION
To check the oil level of the mechanical seal perform the
following:
1. Lay the pump (Figure 12) on its side with the oil plug
facing upwards.
2. Remove oil fill plug.
3. Visually inspect oil plug hole to verify that oil cavity
is full enough to cover seal spring. Check every 300
hours. Change hydraulic oil every 6 months (1,000
hours) or as needed.
4. While checking the hydraulic oil level, also check the
condition of the hydraulic oil in the seal cavity. Block the
opening with a finger and roll pump to one side to drain
oil into a small transparent container. If oil is cloudy or
has water in it, drain oil from pump cavity and replace
hydraulic oil. Check the seal for wear damage.
5. If oil level is low, fill with SAE 10 weight non-detergent
hydraulic oil (i.e. Shell Turbo 32 or equivalent). Fill oil
cavity 75% to 85% full (allow air space for expansion).
See Table 1 for pump oil cavity capacity.
IMPELLER
1. Make sure the clearance between the impeller and
the friction disk is approximately .012 - .020 inches
(.304 - .508 mm.)
2. If impeller is defective or badly worn, replace impeller
immediately.
Figure 12. Checking Hydraulic Oil
OIL FILL
PLUG
FILL TO 75-80% CAPACITY
SEE TABLE 1 FOR FILLING
CAPACITY.
LAY PUMP FLAT
ON ITS SIDE
FILL WITH 10 WEIGHT NON-
DETERGENT HYDRAULIC
OIL. USE SHELL TURBO 32
OR EQUIVALENT.
REMOVE FILL PLUG, AND
VISUALLY INSPECT THAT
OIL CAVITY IS FULL ENOUGH
TO COVER SEAL SPRING.
CHECK HYDRAULIC OIL
EVERY 300 HOURS. CHANGE
EVERY 6 MONTHS OR AS
NEEDED.
DISCOLORATION OF OIL
(MILKY)INDICATES A LEAKING
PUMP WATER SEAL.
SUBMERSIBLE
PUMP