Ulvac PMB100D Instruction Manual page 55

3.2.2 Lubrication to the Mechanical seal
There is a mechanical seal inside the cover on the motor side. If you supply lubricant to the cover
on the motor side, the mechanical seal is also lubricated.
In order to prevent the oil shortage of the mechanical seal, when operating the pump after stopping
the pump for more than 3 months or after having relocated the pump, be sure to lubricate to the
mechanical seal.
Lubricate 20ml or so by providing oil again after once discharging the inside oil.
CAUTION
Structure of the Mechanical seal would allow a slight oil leak even the sealing was correct.
In case you look oil to the oil level gauge at the cover of motor side, that there is an oil leakage
from the Mechanical seal section.
You should drain out oil of the reservoir, and it relubricates the cover on the motor side.
Note to lubricate, be sure to stop running the Pump and return the Mechanical booster inside to the
atmospheric pressure.
However a deterioration of the mechanical seal may be considered, if the lubrication oil pooled
0.15mL/Hour or more at the bottom of the Motor flange
You need Replace the Mechanical seal.
Replacement parts and repair support at the local service center. Please contact us.
Be sure to lubricate the machine. If the lubrication oil came down
lower than limit level during operation, it might give damage on the
bearing, gear and shaft sealing and result in leak, noise, motor
overload and operation stop.
Fig. 23 Lubrication to the Mechanical seal
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YK11-0016-DI-002-08