WÄRTSILÄ Vasa R22, Instruction Manual

Page: 266 / 297

22.3.4 Electro-pneumatic overspeed trip device
a) Check of stop position
•
set the stop lever in work position and the terminal shaft
lever in maximum fuel position,
•
release the overspeed trip device manually,
•
check the fuel rack positions to be less than 5 mm.
b) Adjustment of stop position
•
the electro-pneumatic overspeed trip device requires no ad-
justment,
•
if a fuel rack position of less than 5 mm cannot be obtained,
check for wear.
c) Check and adjustment of tripping speed
•
see section 22.6.
Electro-pneumatic overspeed trip device 22/26
22.3.5 Starting fuel limiter
a) Check of limit position
•
set the stop lever in work position and the terminal shaft
lever in maximum fuel position,
•
connect pressure air to the nozzle (5), Fig 22-4, at which the
limiter piston (1) will turn the control shaft to the limit
position,
0 5
-
2
3
4
1
+
3
5
6
1
1. Non-return valve
3. Valve
4. Air vessel
5. 3-way solenoid valve
6. Piston
Fig 22-3
2222559544
22-9601 Control Mechanism 22
VASA 22 22 - 5