Ulvac GLD-137CC, Instruction Manual

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6. Maintenance, Inspection and Repair
6.1 Maintenance
Check the following during operation at least once every three days.
(1) Amount of pump oil (To be within the range shown with lines on the oil level gauge)
(2) Discoloration of the pump oil
(3) Abnormal sound
(4) Problem with the motor current value
(5) Oil leak from the oil seal
If there is any problem, take proper measures in accordance with “
6.5 Trouble check list
.”
6.2 Periodic inspection
The items to be checked should be changed as necessary depending on the environment where
the pump is used. However, always check the following in order to prevent a malfunction and to
lengthen the service life of the pump.
① Pulled out the power plug before starting inspection and do not turn it
on while inspection is in progress. Doing so will result in injury.
② The pump is very hot immediately after it is stopped. Wait for 10 minutes
until the pump has cooled down completely and then start inspection. There
is a risk of burns.
1) Periodic replacement of the pump oil
The pump oil deteriorates with operation. Check the viscosity and level of contamination of
the pump oil with the oil level gauge, and replace the pump oil in good time. If the pump oil
is replaced periodically, the deterioration of the pump oil is minimized and the service life of
the pump is lengthened.
If operation is continued with a lot of moisture mixed with the pump oil, the ultimate
pressure will not reach the standard value, the movement at the section where the
mechanical friction is generated becomes slow, and the pump finally becomes damaged.
Replace the pump oil in accordance with “
6.3 Replacement of the pump oil
.”
Caution