Maintenance5562−2/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
2/ 2
Remark: Pay attention to the manufacturer’s detailed instructions and working
specifications of the test bench.
⇒ Fit relief valve 11 into the valve holder and tighten it.
⇒ Connect valve holder 94272a to HP oil pump 94931 (or hydraulic unit 94942).
⇒ Close relief valve ’EV’.
2.2 Checking the sealing pressure
⇒ Increase the pressure by means of HP oil pump to 1150 bar and keep pres-
sure constant during one minute.
D No leakage is allowed!
2.3 Checking the opening pressure
⇒ Increase the pressure by means of HP oil pump and observe at what value the
relief valve opens.
Correct opening pressure =
D Confirm the opening pressure two times again.
B
013.484/05
013.486/05
94935
94934a
94272a
11
12
94272
94931 EV 94934a
3. Fitting the relief valve
⇒ Apply Never-Seez NSBT-8 to the thread of valve housing 1.
⇒ Screw the relief valve into the intermediate piece of fuel pressure control valve
3.06 and tighten it with a torque of 300 Nm by means of a spanner with AF41.
2010
Fuel Overpressure Safety Valve: Checking and Setting
1250 bar
+ 100
− 50
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