Maintenance
4325−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 4
Key to Illustrations:
1 Valve seat 18 Spindle
2 Cover 19 Spindle guide
3 Spring 20 Handwheel
4 Valve 21 Locking lever
5 Valve seat 22 Common start valve
6 Valve guide 23 O-ring
7 Spring 24 O-ring
8 Valve body
9 Control valve DT* To instrument panel and
10 Piston seal ring pressure transmitter PT4301C
11 Piston EB Equalizing bore
12 Valve EV* To venting valve 2.21
13 Screw plug SL* Control air
14 Spring TV* To (drain and) test valve 2.06
15 Screw plug
16 Liner bush * See Control Diagram 4003−2
17 Screw in the Operating Manual
1. General
The shut-off valve must be dismantled, cleaned and inspected according to Main-
tenance Schedule 0380−1.
Remark: To avoid water accumulation in the main starting air piping, open water
drain pipe on the main starting air piping after each starting operation for a short
time.
Risk of accident! Before starting work on the shut-off valve for starting air it is es-
sential to manually close the stop valves on the starting air receivers.
The turning gear must be engaged.
The venting valve 2.21 to connection ’EV’ as well as the valve 2.27 must be open
for venting and draining the main starting air piping on the engine (see Control Dia-
gram 4003−2 in the Operating Manual).
2. Dismantling and assembly
2.1 Dismantling
⇒ If the valve seat 1 is to be grind in, first loosen the screws to cover 2.
⇒ Withdraw spring 3 together with valve 4 and spindle 18 as an unit.
⇒ Unscrew spindle guide 19 and remove the valve from the spindle.
⇒ If valve seat 5 of the non-return valve is to be grind in, then the shut-off valve
must be completely dismantled.
⇒ After dismantling valve guide 6 and spring 7 remove valve body 8 of the non-
return valve.
D When the above mentioned items are being checked, control valve 9 has also
to be dismantled and cleaned.
hut-off Valve for Starting Air
leaning and Function Check
2010
To Next Page
Loading...
Need help?
General
