Aquatec DC 500, User Manual, Page: 18 / 25

18
Maintenance
In operation, regularly check all hose connections for leaks.
Filter Maintenance Time interval
Coarse filter Cleaning as required
Prefilter Replacement of filter elements as required
Charcoal filter Replacement of filter element every 3 months
High-pressure pump
Oil change
up to 25°C engine oil SAE 10-40
over 25°C gear oil SAE 80-90
initial change after 50 hours, then
quantity 0,36 liter = mid sight glass
every 300 operating hours at the latest or
once a year.
Valves HP / LP control
Approximately after 1000 hours, or in case of
and seals
leakages. Change of pump seals and possibly of
The valves and plungers.
Pressure regulation valve
Anchor bolt cleaning / grease o-ring About every 12 month
Belt tensioning
Tension the belt by loosening the 4 nuts of the motor bolts. The motor bolts are
secured in the base plate and cannot turn with.
For tensioning, turn with e. g. a hammer handle between motor and pump in order to
obtain pressure, if necessary. The belt should not give way if you press it down lightly
with one finger.
After the tension of the belt please check the alignment (eg ruler along the pulley).
Service pressure regulation valve.
To take the pressure pin out of the valve
body, unscrew the adjusting knob. Then
take off the spring with pressure disk.
Now you see the pressure pin with a M3
tapped hole and pull it out by screwing in
a M3 screw.
Maintenance is limited to cleaning and
silicone grease lubrication.
The O-ring has only to be changed in
case of leakage.