Maintenance5610−1/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
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2. Refilling the accumulator
Measurement set 94720c must always be used to refill the accumulator.
The hydraulic accumulator may only be filled with super-clean, class 4.0 nitrogen,
99.99 % N
2
by volume.
2.1 Refilling procedure
⇒ Fit pressure reducing valve 3 to nitrogen bottle 15 and adjust the pressure to
approx. 40 bar.
⇒ Close the three valves A, B and C on control unit 5.
⇒ Connect pressure reducing valve with long hose 4a to the right side (C), and
accumulator with short hose 4 to the left side (A) of control unit.
⇒ Open valve A and read pressure from gauge 7.
⇒ Slowly open valve C and refill accumulator to the required pressure of 35 bar.
⇒ Close valves A and C and drain remaining pressure in control unit by opening
valve B.
⇒ Disconnect hoses 4, 4a and refit all protection caps.
2.2 After checking or refilling procedure
⇒ Reopen valve 14 on pressure reducing valve 8.11−1 in the rail unit (Fig. ’D’).
⇒ Close screw plug 13.
After pressure checking and refilling the accumulator, ensure to run the servo oil
supply and vent air from the system before putting the pulse lubricating system into
operation (see Operating Manual 7218−1).
2011
Pressure Reducing Valve: Checking the Gas Pre-charge Pressure
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