DMLU
Maintenance
Project:
Model:
Chk’d:
Date:
Note: Disassembly and repair of the pump should only be performed by factory trained service centers. Errors made
by unqualified personnel can result in improper assembly and operation, therefore resulting in possible injury.
1.
Recommended daily inspections:
a.) Check the motor current and its fluctuation. If there is a great deal of fluctuation, something may be clogging the
pump.
b.) Check to make sure the pump is providing the correct amount of flow. If the discharge decreases dramatically,
something may be clogging the pump.
2.
Recommended monthly inspections:
a.) Measure the insulation resistance. The value should be more than 1 meg-ohm. If the resistance falls rapidly
even with an initial reading of more than 1 meg-ohm, further inspection and possible repair may be required.
3.
Recommended annual inspections:
a.) Check the oil in the seal chamber. If the oil has turned white it is an indication that water has mixed with the oil
and the mechanical seal needs to be replaced. The service life of the mechanical seal can be prolonged by
replacing the oil in the seal chamber on an annual basis. See the recommended amount of oil below in Figure 5.
Replace the oil by laying the pump on its side as illustrated in Figure 6.
Figure 5
Figure 6
4.
Extended storage:
a.) Keep pump in a dry environment, out of direct sunlight.
b.) Every 30 days, check the insulation resistance and rotate the impeller by hand to prevent rotating parts from
seizing together.
Always turn the power OFF before inspecting and repair the pump. Failure to do so can result in serious injury.
Warning
Motor Size (HP)
3
5
7.5
10
15
20
30
Mechanical seal
(mm)
30
40
45
Lubricating oil (oz)
Turbine oil ISO VG32
38
58
102
CALL 1-800-577-8111 FOR SALES AND SUPPORT
CALL 1-800-577-8111 FOR SALES AND SUPPORT