MAINTENANCE
Lubrication
To check the lubrication oil level of the mechanical seal perform the following:
Checking Lubrication Oil Level
1.Lay the pump (Figure 17) on its side with the oil plug facing upwards.
2.Remove oil fi ll plug.
3.Visually inspect oil plug hole to verify that oil chamber is full enough to cover seal spring.
4.When reinstalling oil fi ll plug, apply tefl on tape to prevent leaking.
WARNING
When removing oil fi ll plug, please note that pressure may have built up in the oil chamber. DO NOT fully remove plug until pressure has been relieved.Turn oil fill plug slowly to relieve pressure.
Changing Lubrication Oil
1.If lubrication oil level is low, block the oil fi ll opening with a fi nger and roll pump to one side to drain oil into a small container.
2.Use a funnel (Figure 17) and fi ll oil chamber with ISO VG32 lubrication oil or equivalent. Oil chamber capacity is 74.4 oz. (2.2 liters). Fill to
| REMOVE FILL PLUG, AND | |
| VISUALLY INSPECT THAT | |
| OIL CHAMBER IS FULL ENOUGH | |
| TO COVER SEAL SPRING. | |
| FILL TO | |
| (APPROXIMATELY 74.4 OZ. (2.2 LITERS) | |
| FILL WITH ISO VG32 LUBRICATION | |
| OIL OR EQUIVALENT. | |
LAY PUMP FLAT | CHECK HYDRAULIC OIL ONCE | |
ON ITS SIDE | ||
A YEAR OR EVERY 3000 HOURS. | ||
|
Figure 17. Adding Lubrication Oil
Inspecting Lubrication Oil (Mechanical Seal)
1.Block the oil fi ll opening with a fi nger and roll pump to one side to drain (Figure 18) oil into a small transparent container.
2.If oil is cloudy (milky) or has water in it, indicates that mechanical seal is defective or worn. Replace mechanical seal.
Figure 18. Lubrication Oil Inspection
NOTICE
When replacing the oil in the oil chamber, shaft seal MUST be changed at the same time.
PAGE 22 — ST4125G/ST6125G SUBMERSIBLE PUMP • OPERATION MANUAL — REV. #0 (11/18/10)
