Service guide | Disassembling and Assembling, APP 21-43
© Danfoss | DCS (im) | 2017.06
180R9121 | 521B1018 | DKCFN.PI.013.A6.02 | 11
2. Remove the O-rings and backup rings. If
they have been removed they can not be
reused.
Mount the new back-up rings on the valve
plate first and then mount the O-rings.
1. Push a screwdriver into the hole between
cylinder barrel and valve plate. Carefully
push downward the screwdriver so that it
makes a gap between cylinder barrel and
valve plate. Use this gap to put in another
screwdriver and loosen the valve plate
from the cylinder barrel.
4. Remove the press bush again by screwing
the nut counter-clockwise.
Turn the nut slowly clockwise. The valve
plate must slide gently into the cylinder
barrel. Stop when the gap between
cylinder barrel and valve plate is 1–2 mm.
3. Lubricate the new O-rings/back-up rings
and the liners in the cylinder barrel with
clean filtered water. Lower the valve plate
upside down on the cylinder barrel. Place
the press bush for valve plate (provided in
tool set) like on the picture. Screw the bolt
into the shaft of the cylinder barrel. Turn
the nut slowly clockwise. The valve plate
must slide carefully into the cylinder
barrel. Stop when the gap between
cylinder barrel and valve plate is 1-2 mm.
5. Disassembling and
assembling of cylinder
barrel and valve plate
6. Disassembling and
assembling of the
flush valve
Mount then
O-rings
Mount
backup
rings first
1. Unscrew the flush valve counter-clockwise
by using a pin wrench.
2. Remove the O-rings (green and black). If
necessary, change the valve cone, spring
and plug. If the spring is changed it is
important that it is located like on the
picture. The end of the spring must be
against the shoulder of the valve cone.
3. Put a little amount of grease on the thread
on the plug. Screw it into the port flange.
Tighten with a torque according to
exploded view.
