Wartsila RT-flex50-D - Page 178

Maintenance2708−2/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
2/ 3
⇒ Connect both connection pieces 94215b by their HP hoses to hydraulic jacks
94215a.
⇒ Connect hydraulic unit 94942 to connection pieces 94215b.
B
94215b
94215
a
94942
94935
94934
94934a
012.962/05
I
94215b
I
3. Loosening
⇒ Set-up of the pre-tensioning jacks as mentioned in section 2.
⇒ Start up hydraulic unit 94942.
⇒ Close vent screws 3 on the pre-tensioning jacks as soon as oil flows bubble-
free.
⇒ Actuate the hydraulic unit until a pressure of approx. 1530 bar is indicated.
Pistons 4 of the pre-tensioning jacks must never exceed the red limiting grooves
’BN’ (Fig. ’C’).
⇒ Turn back nuts 2 by about one turn, using round bar ’RS’ (Fig. ’A’).
⇒ Release pressure to ’0’.
⇒ Remove the pre-tensioning jacks.
L
oosening and Tensioning of Cylinder Cover Waisted Studs
2010