29
(6)
Inspecting the coupling
Check the coupling which connects the main pump unit and motor of the
pump for damage.
If cracks or fractures are found on the coupling，replace it in accordance
with ｢
6.4
Replacement of the coupling｣
.
(7)
Inspecting the oil mist trap
When applying the oil mist trap instead of the standard vacuum tubing, pay
attention for clogging of the mesh filter of the oil mist trap. Heavy clogging
may cause increasing inside pressure or bursting out the oil level gauge.
Also, it may cause oil leakage from shaft seals or drain plug seals.
The maximum pressure inside this pump is 0.03 MPa (GAUGE).
Besides the inspecting items mentioned above, overhaul is useful when
continuing the operation for long term or observing heavy contaminated oils.
Please contact your local ULVAC KIKO,Inc. Sales and Service Center.
When requesting overhaul or repair the pump, inform the sort of evacuated
gases on the "Check sheet for repair" attached at end of this manual, and
submit the sheet by all means. When evacuating toxic gases, the pump body
and the oil may cause toxic. We cannot overhaul or repair the pump
evacuated some sort of toxic gases.
6.3 Oil change
Oil deterioration may cause the operating pressure rising. Confirm the specked
ultimate pressure by plugging the pump inlet port. If observing the high ultimate
pressure, change the pump oil. If mixing volatile contents (water, solvent) in
the pump oil or precipitated sludge on the pump bottom, several times oil changing
procedures should be necessary. The oil deterioration may be caused not only
by oil contamination due to evacuated gases but also by oil performance change
depending on long operating time. We recommend periodical oil change by the
Table-3 "
Scheduled Inspection
".
