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10.2 Check Valves Service
Disassembly
The check valves are easily accessible after removing the two brass caps, each one fixed by 8
M14 screws.
8. Take out the valves and the relevant O-Rings from their seat in the head, using a small
screwdriver.
9. Check the housings bottom, on the head, is absolutely smooth and do not present flut-
ings or apparent wear marks.
Checks
10. Check the O-Rings integrity
11. Check the valve springs integrity.
12. Check the poppets are not stuck to their seat and can run within the plastic cages.
13. Check the integrity of the cages and particularly verify the guide are not deformed or
damaged by wear.
14. Check the contact areas seat-poppet does not present pitting or wear marks.
Assembly
5. Lubricate the O-Rings with a coat of oil and locate them at the bottom of its housing.
6. Insert the valves in its housing after lubricating with a oil film. Take care the valve is
completely perpendicular at the bottom of its housing.
7. Fit the O-Rings between the head and the caps in their seat.
8. Replace the valve caps, and tighten the 16 screws M14 at 108 Nm torque.
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