Installer Manual Magnum 742-762 - Maintenance
82 / 106 Ref. MKT-IM-012 / C - 25.10.2019
9.6.11. Top plate and disc valve replacement
No. Operation
A Remove the camshaft cover. See 9.6.6. Camshaft cover disassembly, page 77.
B Remove the camshaft. See 9.6.8. Camshaft replacement, page 79.
Caution
Take care with sharp edges. Use of protective glove is highly recommended to release or
remove the springs (1).
A Using a flat screwdriver, release the flapper springs (1) one by one (8x).
B Loosen all top plate screws (3) (14x).
C Remove the top plate (2) from the valve.
D Clean or replace the flappers (4) if needed.
Note
The outline of the flapper seat can be seen on the flapper side. If the outline is irregular,
this may indicate that debris is or has been preventing the flapper (4) from closing, and
potential damage.
Note
When refitting the top plate (2), always follow the screwing order below.
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