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9.3
Servicing the Outlet Valves
The following exploded view and pictures relate to the HPS 550 R model, but the information is valid
for all models.
HPS 550 R
74 – Valves + seals kit
Remove the pump head and use pliers to remove the outlet valves. Check to see if the valves are
damaged or there are any impurities; in any case we recommend you replace them with a new KIT.
Make sure that the O-rings have been removed from their position and fit the new valves kit with the
new OR. In order to keep the valve O-rings in place it is possible to use silicon grease
(see
5.3.2)..
71- PLUG ................13 ÷ 20 Nm (25 Nm for HPS 650 RG)
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Maintenance Guide HPC
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