ST-3050D SUBMERSIBLE PUMP — MAINTENANCE
LUBRICATION
To check the oil level of the mechanical seal perform the following:
1.Lay the pump (Figure 19) 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 enoughtocoversealspring.Checkevery300hours,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 hydrau- lic oil. Check the seal for wear damage.
5.If oil level is low fill with SAE 10 weight
IMPELLER
1.Make sure the clearance between the impeller and the friction disk is approximately .012
2.If impeller is defective or badly worn, replace impeller imme- diately.
Figure 19. Checking Hydraulic Oil
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