WÄRTSILÄ VASA 6L32, Instruction Manual

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x)
Pos. 6 see installation instructions.
The stud bolts are tightened to the casting at the following
torques:
Screw dimension Tightening torque (Nm)
M56 Cylinder head
400
±
20
M56 Main Bearing
300
±
10
All M27 studs on connecting rod 100
±
10
M42 and M48 x 3 200
±
10
M80 Intermediate gear
200
±
10
Exception! Screws acc. to pos. 3 and 6.
Pos. 3 see chapter 10, section 10.3.3.
Caution! The screws will be overloaded if the maximum hydraulic
pressure is exceeded.
It is recommended to change the screws if maximum hydrau-
lic pressure is exceeded for some reason.
07.3.2 Hydraulic Tool Safety Instructions
Since the hydraulic tools operate under high pressure and pro-
duce great force, proper safety precautions must be taken to
reduce the risk of injury to persons and damage to material during
work on the engine and in the workshop.
Hydraulic tool lifetime
Tool Load cycles (approx.)
Piston in cylindrical hydraulic tools (see Fig 07-24) 1 000
Screws in "twin cylinder" hydraulic tool (see Fig 07-23) 1 000
Hydraulic hoses and couplings 10 000
There are two types of hydraulic tools for the connecting rod shank
screws, see Fig 07-23. The screws and nuts in the tool of new
design (introduced in year 2001) should be replaced before
reaching 1000 loading cycles, i.e raising the pressure to nominal
value 1000 times)
The screws and nuts of
previous design, see Fig 07-23, should
be replaced before reaching 250 loading cycles.
If the hydraulically tensioned nuts not easily can be turned when
the maximum hydraulic pressure is reached: check for corrosion
in threads; check tool condition and manometer error.
32-200643-01 Tightening Torques and Use of Hydraulic Tools 07
WÄRTSILÄ 32 07 - 23