As required
BOMAG
59
BPR 35/60
As r equi red
6.22 Tightening the screws
Note
i
Self locking nuts must always be replaced by new
ones after they have been unscrewed.
Fig. 82
*Strength classes for screws with untreated, non-
lubricated surfaces. 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 us-
ing MoS
2
lubricants.
6.23 Engine conservation
If the engine is to be shut down for a longer period
of time (e.g. over winter), we recommend the fol-
lowing measures to avoid corrosion:
l
Clean the engine: For this purpose use cold
cleansing agent or, even better, a steam
cleaner.
l
Run the engine warm and shut it down.
l
Drain the still warm engine oil and fill in fresh
engine oil.
Danger
!
Fire hazard!
Gasoline is easily inflammable, do not spill.
When working on the fuel system do not use
open fire, do not smoke.
l
Close the fuel cock.
l
Remove and empty the fuel sludge filter.
l
Open the fuel tap and let the fuel run out into a
suitable vessel.
l
Reassemble the fuel sludge filter and tighten it
correctly.
l
Drain the carburettor by slackening the drain
plug.
l
Unscrew the spark plug and fil approx. 1 table
spoon full of clean engine oil into the cylinder.
Crank the engine several times and turn the
spark plug back in.
l
Set the piston to top dead centre position of
the compression stroke; intake and exhaust
valves are closed.
l
Take the V-belt off and spray the grooves of
the V-belt pulleys with anti-corrosion oil. Re-
move the anti-corrosion oil before taking the
machine back into service.
l
Close air intake on air filter and exhaust open-
ing tightly.
l
On machines with electric starter remove the
battery and recharge it once every month.
l
Cover the engine and stand it on a wooden
pallet.
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