WÄRTSILÄ PAAE051728, Instruction Manual

Page: 151 / 394

07.3.5 Reassembling hydraulically tightened
screw connections
Check that the threads and contact surfaces are clean and free
from particles.
1 Screw on nuts and attach distance sleeves.
Screw on
cylinders by hand.
2 Connect the hoses to the pump and cylinders.
Check
that the release valve is open and screw the cylinders in
clockwise direction to expel possible oil.
3 Close the release valve and pump pressure
to the
stated value.
4 Screw the nuts
in a clockwise direction until in close con-
tact with the face. Use the pin intended for this purpose and
tighten the nut as much as possible without breaking the pin.
Keep the pressure constant at the stated value.
5 Open the release valve and remove the hydraulic tool set.
To ensure that the nut will be properly tightened, the pressure
can be raised in two steps. Pump the pressure according to section
07.3.1 and screw the nut in a clockwise direction until in close
contact with the face. Increase the pressure further to the stated
pressure, and screw the nut until in close contact with the face
again. This time the nut should move just a limited angle but
approximately the same angle for all nuts of the same kind.
Note! Before the engine is started, ensure that all screw connections
that have been opened are properly tightened and locked.
32-200643-01 Tightening Torques and Use of Hydraulic Tools 07
WÄRTSILÄ 32 07 - 27