Assembling The Head - Valve Units - Pratissoli LK Serie Manual De Reparación

Take out the valve guide spacer using an 8 mm hex wrench
(pos. , Fig. 111).
Extract the suction valve unit with an extractor hammer to be
applied on the M10 hole of the valve guide (pos. , Fig. 112).
If removing the suction valve unit proves to be
particularly difficult (for example because of
incrustations due to prolonged inactivity of the
pump), use the extractor tool (code 27516200
(for LK36-LK40-LK45) or code 27516300 (for
LK50-LK55-LK60)(pos. , Fig. 113) as indicated.
Remove the suction and outlet valve units, unscrewing an M10
screw in such a way to press on the inner guide and remove
the valve guide from the valve housing (pos. , Fig. 114).
Fig. 111
2.2.2 Assembling the head – valve units
Pay particular attention to the conditions of the
various components and replace if necessary.
At every valve inspection, replace all O-rings
both in the valve unit and in the valve plugs.
Before repositioning the valve units, thoroughly
clean and dry the relative housings on the head
indicated by the arrows (pos. , Fig. 115).
Fig. 112
Proceed with reassembly following the reverse order indicated
in par. 2.2.1.
Fig. 113
57
Fig. 114
Fig. 115