WÄRTSILÄ RT-flex50-D, Maintenance Manual

Page: 409 / 522

Maintenance
6735−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 1
Key to Illustrations:
1 Housing 7 Lock nut
2 Cover 8 Screw
3 Piston 9 Guide ring
4 Pressure reducing valve 10 Piston seal ring
5 Adjusting screw 11 Compression spring
(stroke limitation) 12 3/2-way valve
6 Seal (1 mm thickness) 13 Silencer
1. Dismantling, function check
A function check must be carried out half-yearly on the running engine (see also
Operating Manual group 6735−1). If a malfunction in the waste gate valve occurs it
must be overhauled according to the following instructions at the first opportunity:
Attention! Adjusting screw 5 must not be readjusted!
⇒
Loosen screw 8 for cover 2. Specially long screws are fitted for releasing the
spring 11.
⇒
Dismantle piston 3. Clean piston and housing 1.
⇒
Check piston seal ring 10, guide ring 9 and replace them if necessary.
⇒
After reassembling smear piston lightly with oil and check its easy movement
in the housing.
2. Assembling
Assembling is carried out analogously to dismantling but in reverse sequence.
Attention! Should seal 6 need to be replaced, attention must be paid to ensure
that a seal of the same thickness (1 mm) is refitted.
Before assembling smear all moving parts lightly with clean oil.
Remark: The retaining pressure is adjusted with pressure reducing valve 4.
A B
2
1
7
5
8
3 9 10 11
6
13
013.381/05
701.013.381
013.394/05
4
12
Scavenge Air Waste Gate
Dismantling and Assembling
2010