Instruction manual

Issue H Oct 04
PAGE
26
GV Dry Vacuum Pumps
MAINTENANCE
26
Operation Frequency
Refer to
Section
Check the gearbox oil level and fill the gearbox
with oil (if necessary)
Weekly 5.3
Inspect the gas-ballast system Monthly 5.4
Inspect the pipelines and connections 3 Monthly 5.5
Inspect the interstage relief valve and replace
the hinge bushes, flap and ‘O’ ring (if necessary)
Yearly or when necessary 5.6
Change the gearbox oil and clean the oil-level
sight-glass *
§
When you relubricate the high
vacuum bearings or when
contaminated
‡
, whichever
occurs first
5.7
Relubricate the high vacuum bearings * When necessary
Ø
5.8
Clean the cooling-jacket * Yearly or when necessary 5.9
Replace the interstage relief valve When necessary 5.10
Replace the pump-motor
#
When necessary 5.11
Replace the coupling insert
†
Yearly 5.12
Relubricate the motor bearings When necessary ¤ 5.13
Replace the motor bearings ** When necessary 5.14
Overhaul the pump 3 Yearly 5.15
* You must have a Routine Maintenance Kit to do these maintenance operations.
§ For maximum pump reliability, we recommend that you change the gearbox oil when you relubricate
the high vacuum bearings: refer to Section 5.8.
‡ If the gearbox oil is contaminated (indicated by a change in colour of the oil, for example, water
contamination will turn the oil a white colour), you must change the oil. You may be able to remove
the contaminants from the oil by filtration.
# You must have a new pump-motor and a Motor Fitment Kit to do this maintenance operation.
Ø The frequency of maintenance depends on the operating temperature of the pump: refer to
Section 5.8.
† You will need a Motor Fitment Kit to do this maintenance operation.
¤ See Section 5.13.
** You will need a Motor Bearing Kit to replace the motor bearings.
Table 11 - Maintenance plan