Wartsila RT-flex50-D - Dismantling of Exhaust Valve; Dismantling of Complete Valve Drive; Dismantling of Valve Spindle

Maintenance
2751−2/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
3/ 9
2. Dismantling of exhaust valve
2.1 Dismantling of complete valve drive
Attention! During dismantling and assembling, the activity area has to be clean
and as dust-free as possible (grinding dust etc.), and performing electric welding
must absolutely be omitted near or on the engine.
⇒ Place the exhaust valve on wooden underlay ’HU’ in vertical position.
⇒ Loosen and remove all nuts 3 (Fig. ’A’).
⇒ Lift the upper valve drive and remove it using eye bolt ’RC’.
⇒ Loosen screws 31 and remove transmitter housing 32 and valve stroke sen-
sor 30.
⇒ Loosen and remove all screws 4.
⇒ Lift lower housing 2 and remove it.
2.2 Dismantling of valve spindle
⇒ Remove circlip 14.
⇒ Push piston 16 away from valve cotters 15, then remove the latter.
⇒ Withdraw the piston from the valve spindle.
⇒ Remove disc spring 18.
⇒ Carefully lift valve cage 1 by means of the engine room crane. Ensure that the
valve spindle always stands on the wooden underlay while the valve cage is
sliding out.
C
HU
15
35
18
9
16
17
WCH00406
14
1
2011-12
E
xhaust Valve: Dismantling and Assembling