FLYGT 4640 - Major Overhaul and Inspections

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Service contract
Flygt or its agent normally offers service agreements
in accordance with a preventive maintenance plan. For
further information, please contact your Flygt repre-
sentative.
Ex-approved machine!
All work on the explosion-proof
motor section must be performed by
personnel authorized by Flygt.
Oil in
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Oil out
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Major overhaul
This requires special tools and should be done by an
authorized service shop. Workshop overhaul involves
in addition to the inspection, that the following will be
measured;
— replacement of bearing.
— replacement of the plug-in seal..
— replacement of oil.
— replacement of O-rings.
— replacement of seals in cable entry and moving the
entry position of the cable.
— replacement of cable.
Recommended inspections
Inspection of Action
Visible parts on mixer Replace or fix worn and damaged parts.
and installation Make sure that all screws, bolts and nuts are tight.
Check the condition of lifting device/lifting eyes, chains and wire ropes.
Check that the guide bar is vertical.
Replace worn parts if they impair function.
Oil quantity WARNING. If the seal leaks, the oil casing may be under
pressure. Hold a rag over the oil casing screw in order to prevent
splatter. See “Safety precautions” for additional information.
Check that the oil level minimum reaches up to the centrumline of the shaft.
A check of the condition of the oil can show whether there has been an increased
leakage. Check the oil by removing the oil drainage screw. Leave the oil filling
screw in place in order to restrict the flow. As the oil separates the water, the liquid
coming out first will indicate a possible leakage. Tap until clear oil is coming out.
If leakage less than 0.1 ml/h, the seal functions normally. Refill the tapped volume
with new oil. See “Changing the oil”.
If the leakage is more than 0.1 ml/h, refill the oil. Run the mixer for one week and
check the oil again. If leakage is more than 0.1 ml/h the fault may be:
— that the outer mechanical seal is damaged. Contact a Flygt service shop.