6.11 As required
6.11.1
Tightening the screws
Self locking nuts must always be replaced by new
ones after they have been unscrewed.
*Strength classes for screws with untreated, non-lubricated sur-
faces. The quality designations are stamped on the screw heads.
8.8 = 8 G
10.9 = 10 K
12.9 = 12 K
The values result in a 90% utilization of the screw's yielding point
at a coefficient of friction of μ total = 0.14.
The compliance with the tightening torques is to be checked with
torque wrenches.
The tightening torques are not applicable when using MoS
2
lubri-
cants.
6.11.2
Engine conservation
If the engine is to be shut down for a longer period of time
(e.g. during the winter) we recommend the following conser-
vation measures for the engine to avoid corrosion:
Clean the engine including the cooling system: with cold
cleansing agent or, even better, with a steam cleaner.
Run the engine warm and shut it down.
Drain the still warm engine oil and fill in anti-corrosion engine
oil.
Drain the fuel from the fuel tank, mix it well with 10% anti-cor-
rosion oil and fill it in again. Instead of mixing anti-corrosion
oil with the fuel it is also possible to fill the tank with injection
pump testing oil with anti-corrosive properties (e.g. Calibra-
tion Fluid B).
Run the engine for 10 minutes until all lines, filters, pump and
nozzles are filled with the conserving mixture and the new
engine oil is distributed to all parts.
After running the engine remove the valve cover and spray
the rocker chamber with a mixture of diesel fuel and 10%
anti-corrosion oil. After this screw the cover back on.
Crank the engine several times by hand (throttle lever in stop
position) to spray the combustion chamber.
Take the V-belt off and spray the grooves in the V-belt pul-
leys with anti-corrosion oil. Remove the anti-corrosion oil
before taking the machine back into operation.
Close the air intake opening on the air filter and the exhaust
tube.
Fig. 71
Maintenance
BPR 35/42 D - BPR 35/60 D
73
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