INSTRUCTIONS FOR USE
AGP 1000 – 2000 PRO
Rev.02/2019
55
11.5
Pump maintenance
11.5.1
Oil change
Figure 11.2
Only use the recommended oil (see the table on the identification plate of the pump or on the oil
cover of the pump). The first oil change should be performed after 10-20 hours of operation and
then every 300 hours of operation or at the end of each working season. During each oil change,
also check the condition of pressure diaphragms and replace them, even if not damaged.
11.5.2
The APS 121 pump
To check the pressure diaphragms, loosen the screws on the cover of the pump and remove the
cover.
Check the lower and upper side of all pressure membranes while draining the oil.
Assemble the pump in the reverse order.
Before it is re-assembled, it is recommended to wash the inside of the pump and all its vital
components with gas oil. Make sure to insert the valves correctly (see the catalogue). Then add oil
through the oil cup. When pouring the oil, manually turn the pump’s shaft a few times to release
the air from the compartment between the piston and the diaphragm. Then start the pump and let
it running for a few minutes at minimum pressure. Pay attention to the operation of the pump and
add the missing amount of oil, if necessary. Make sure the oil level is around the middle between
the max. and min. oil level lines (Figure 11.2).
WARNING: Waste oil must be collected in a suitable container and delivered
to an authorized collection centre. It must not be disposed in the
environment!
