VAN DER ENDE Danfoss PAH, Installation Manual

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6. Maintenance
Routine maintenance and inspection is always necessary. Danfoss pumps require maintenance every
8,000 hours. Clean filters and check for oil or water leaks daily. For Hawk and Pratissoli pumps, the
following applies.
Every 500 hours
Every 1,000 hours
Check the oil level Replace the oil
Oil must only be replaced after the first 50 hours. Check or replace:
 Valves
 Valve seats
 Valve springs
 Valve guides
Check or replace:
 High Pressure gaskets
 Low Pressure gaskets
The set can be cleaned with a dry cloth; never use water on electrical parts. Do not use abrasive
cleaners.
Before working on the high-pressure system, make sure it has been depressurised and that the
isolating switch is turned off.
6.1 General
Frequency: weekly.
 Turn the isolation switch off;
 Depressurise the pump;
 Check the oil level with the dipstick and/or use the oil sight glass:
o
the oil level should be at the mark;
o
for more on filling/changing oil, see 6.2;
 Check that all connections are secure;
 Check that all hoses are secure;
 Check hoses for wear and damage:
o
replace if necessary;
 Check connecting cables for wear and damage;
 Check if all other nuts and bolts are tight;
 Check the filter in the suction pipeline:
o
remove any foreign objects;
o
remove any dirt and scale deposits;
 Check that the inlet pressure switch is working.