29
10.4 B) Delivery valves
•
Remove the valve housings from the head. Certain models have a thread in the
central hole of the valve housing. If this is the case, screw in an M8 bolt to facilitate
the removal operations. In models without this thread, insert a plug and release the
valve housings by applying lateral movements;
•
Remove the plates, springs, valve spacers and valve guides from the head (keep the
components of the three pumping elements separate, if the used parts are going to
be re-assembled).
–
Inspect the contact surfaces between plate and valve housings. Replace the
components if they are excessively worn.
–
Assess the clearance between the plate stem and plate guide. Replace the
components if there is too much play.
Valve
Plate
Spring
Valve spacer
Plate guide
Summary of Contents for 74.1030.97.3
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