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EBARA Submersible Sewage Pumps
Instruction Manual
Maintenance and Service
1. Daily inspections:
(1) Check current and ammeter fluctuation daily. If ammeter fluctuation is great, even though within the limits of pump
rating, foreign matter may be clogging the pump. If the quantity of liquid discharged falls suddenly, foreign matter may
be blocking the suction inlet.
2. Regular inspections:
(1) Monthly inspections
Measure the insulation resistance. The value should be more than 1 mega ohm. If resistance starts to fall rapidly even
with an initial indication of over 1 mega ohm, this may be an indication of trouble and repair work is required.
(2) Every 6 months
Check the mechanical seal every six months. If you notice water
mixed with the oil or cloudy texture of the oil, these may be
indications of a defective mechanical seal requiring replacement.
The service life of the mechanical seal can be prolonged by
replacing the oil in the mechanical seal chamber once a year.
When replacing the oil, lay the pump on its side, with filler plug
on top as shown in Fig. 4.
For over 7
1
/
HP motors, inject turbine oil No. 32 (ISO VG-32) until it overflows. Be certain to dispose of oil residue properly.
2
(3) Preventive maintenance yearly
Conduct an overhaul of the pump annually. These intervals will reduce the possibility of future trouble.
3. Parts that will need to be replaced:
Replace the appropriate part when the following conditions are apparent.
Replaceable Part
Mechanical Seal
Whenever oil in
Replacement guide
mechanical seal
chamber is clouded
Frequency
Above replacement schedule is based on normal operating conditions.
EBARA Pumps Americas Corporation
www.pumpsebara.com
(803) 327-5005 • (803) 327-5097 (fax)
Oil Capacities for DDLF/DDLFMU pumps
HP
15
20
25
30
40
50
60
Oil Filter Plug Gasket
Whenever oil is
replaced or
inspected
Annually
Annually
Oil
75 ozs
120 ozs
115 ozs
120 ozs
220 ozs
240 ozs
240 ozs
Lubricating oil
Whenever clouded
or dirty
Annually
DDLFU/DDLFMU
Fig. 4
O-ring
Whenever pump
is overhauled
Annually
rev. 04/19
8
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