Maintenance And Cleaning - WIKA GFU08 Manual De Instrucciones

9. Maintenance and cleaning

9. Maintenance and cleaning
9.1 Maintenance
The SF gas filling cart is maintenance-free. Information on the maintenance of the
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optional vacuum pump components see chapter "Vacuum pump".
Vacuum pump (models GFU08-E and GFU08-C)
The most important maintenance factor for a vacuum pump is the oil. This must be
replaced when it is strongly contaminated (dark or cloudy oil). After the evacuation of
contaminated refrigerant, the oil must also be replaced. In particular, moisture/water
which remains in the pump until the next use can lead to damage of the pump through
corrosion.
Contaminated oil can damage the vacuum pump.
Process for oil change:
1. Let the pump run warm to the working temperature, then switch off and pull out the
mains plug.
2 Unscrew the oil mist separator.
.
3 Drain the oil by opening the outlet plug, or pour it out through the hole of the oil mist
.
separator by tilting the pump.
4. Plug in the mains plug - switch the pump on. Let it run for approx. 5-10 seconds with
the suction pipe open, so the residual oil is forced out of the pressure stages.
5. Switch the pump off - pull out the mains plug.
6. Drain or pour out the residual oil.
7. Screw the oil drain plug back in tightly.
8. Fill the new oil back to the fill level "middle sight glass".
9. Screw in the oil mist separator. Briefly switch on the pump for a few seconds.
With heavily contaminated oil, it is recommended to repeat the oil change
after about 30 minutes running in order to rinse out all of the contaminati-
on.
In order to achieve the specified performance and to not damage the pump, only ever
use WIKA oil.
The used oil must be disposed of properly by the pump operator in
accordance with regulations!
Repairs must only be carried out by the manufacturer.
WIKA operating instructions SF gas filling cart, model GFU08
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EN
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