Daily Inspection; Regular Inspection - EBARA DL Instruction Manual

If there occurred abnormality such as failing in starting, immediately cut OFF the
power switch to prevent accident, and request the inspection and repair to the
supplier or EBARA CORP. Mal-operation or wrong work may induce accident.
Consumable parts shall be regularly replaced. If the deteriorated or worn parts
Caution
are used, they may lead to serious failures of water leak, seizing, and break of
pump parts. For regular inspection, parts replacement, and related works, request
the matter to the supplier or EBARA CORP.
If inspection of pressure, discharge rate, voltage, current, etc. finds any difference from those of normal
state, the phenomenon is a sign of accident. Therefore, it is important to give quick action to the matter
referring to ８ "Troubleshooting". To do this, keep daily operational record. Preparation of a standby
pump is recommended to respond to an accident.
Note

1. Daily inspection

1) Check current and ammeter fluctuation every day. If ammeter fluctuation is significant even it is
within the limit of pump rating, the pump may have caught foreign matter.
2) If the discharge rate showed a sudden decrease, foreign matter may have clogged the suction
opening.

2. Regular inspection

1) Once a month
Measure the insulation resistance. If the insulation resistance is 1MΩ or more, there occurs no
problem on operating the pump. If, however, a sudden drop appeared in the insulation resistance
even if the value is at or above 1MΩ, the phenomenon is abnormal, and repair of the pump is
required.
2) Once every six months
Replace oil in the mechanical seal chamber at every six months. If
water enters the oil to give significant cloudiness, replace the
mechanical seal. As illustrated in Fig. 7 oiling shall be done at a
specified quantity while the oiling plug faces upright and the pump is
positioned horizontally. After the oiling, fully tighten the plug with a
seal washer.
3) Once a year
Replace mechanical seal at an interval of one year or 6000 hours of total operating hours, either
shorter one. By the replacement, the pump life extends.
4) Once every two to five years
Overhaul of the pump assures safe and long period of operation. For the case of high frequency of
operations, early overhaul is requested.
The table of standard pump performance is available from EBRA CORP.
- 14 -
Fully tighten the
plug after oiling at a
specified quantity.
Fig. 7