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maintenance
A533-23-880 Issue C
6.7
Check the HMB pump oil-level
CAUTION
Do not check the oil-level when the iF system is operating. The correct oil-level may not be shown when the
pump is operating.
CAUTION
Ensure that the oil-level in the HMB pump is correct. If the pump oil-level is incorrect, pump performance may
be affected and the pump may be damaged.
Note:
If there is a significant loss of oil from the pump, the shaft-seals may have failed. You cannot replace the
shaft-seal. Contact your supplier or a Edwards Service Centre for advice.
Use the following procedure to check the oil-level.
1. Shut down the iF system (refer to Section 5.9) and allow it to cool.
2. Remove the right-hand side enclosure panel from the iF system: refer to Section 3.4.
3. Refer to Figure 1. Check that the oil-level is between the MAX and MIN marks on the bezel of the HMB oil-level
sight-glass (5):
If the oil-level is above the MAX mark, drain excess oil from the pump as described in Section 6.10 until the
oil-level is correct.
If the oil-level is below the MIN mark, fill the pump with oil until the oil-level is correct, as described in
Section 6.10.
4. Refit the right-hand side enclosure panel: refer to Section 3.16.
WARNING
Do not remove the oil filler-plug while the pump is operating. If you do, hot oil may be ejected
from the pump.
WARNING
The majority of synthetic oils/grease can cause inflammation of the skin (dermatitis). Safety
precautions must be taken to prevent prolonged skin contact with these substances. Use of
suitable protective gloves and clothing along with respirator is recommended if contact with
substances is anticipated.
WARNING
Particular caution should be exercised when working with Fomblin oil that may have been exposed
to temperatures greater than 260
o
C. Refer to Edwards Material Safety Data Sheets for detailed
information.
