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
M42 and M48 x 3
200
10
M24 and M30 Connecting rod
100
10
Exception! Screws acc. to pos. 4 and 7.
Pos. 4 see chapter 10, section 10.2.3.
Caution! The screws will be overloaded if the maximum hydraulic pressure
is exceeded.
It is recommended to change the screws if maximum hydraulic
pressure is exceeded for some reason.
If it is impossible to turn the nuts, when the maximum hydraulic
pressure is reached: check for corrosion in threads; check tool condition
and manometer error.
07.3.2 Filling, venting and control of the high pressure
hydraulic tool set
The hydraulic tool set consists of a high pressure hand pump with an
integrated oil container, hoses fitted with quick-couplings and non-re-
turn valves, cylinders and a pressure gauge mounted on the hand pump
but not connected to the pressure side of the pump.
The components are coupled in series with the pressure gauge being the last
component thus securing that every cylinder is fed with the correct pressure.
The non-return valves in the hoses are integrated with the quick-cou-
plings and are opened by the pins located in the centre of the male and
female parts. If these pins get worn the coupling must be replaced
because of the risk of blocking.
In the high pressure hydraulic tool set it is recommended to use
a special hydraulic oil or in any case an oil with a viscosity of about
2°E at 20°C.
During the filling of the container of the high pressure pump it is
recommendable to couple the set according to scheme B, Fig 07-15.
Before filling, open the release valve (2) and empty the cylinders
(4) by pressing the piston and cylinder together. After that, drain
the oil and re-fill through the filling plug (1).
After filling, vent the system by pressing in, with a finger, the
centre pin of the female part of the last quick-coupling, the
coupling being disconnected from the pressure gauge. Keep on
pumping until airfree oil emerges from the coupling.
Check the pressure gauge of the hydraulic tool set regularly. For
Tightening Torques and Use of Hydraulic Tools
34SG-200339-09