DAF 95XF, Maintenance Manual

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95 XF
series Threaded connections
THREADED CONNECTIONS
1-1
1. THREADED CONNECTIONS
1.1 GENERAL
The vehicle components are provided with
threaded connections, which have been treated
with lubricant (dipped threaded connection).
Factory-galvanised bolts and nuts are
wax-dipped. Black annealed and phosphatised
bolts and nuts are oil-dipped. The advantage of
using dipped nuts and bolts is that friction during
tightening is reduced, so that the specified
pre-tension force can be accurately obtained.
The tightening torque can be reduced while the
pre-tension force remains the same.
To achieve a small spread in the pre-tension
force, the dipped threaded connection must be
tightened accurately. Therefore, always use a
reliable and accurate torque wrench.
Note:
Have torque wrenches regularly inspected and
calibrated.
To achieve the correct pre-tension when
re-using threaded connections, it is important to
clean the threaded parts thoroughly. After
cleaning, apply one drop of lubricant to the first
turn of the screw thread and one drop to the
abutting surface of the nut or bolt. If bolts and
nuts to be re-used, do not lubricate them with
anything other than engine oil. Lubricants other
than engine oil or factory-applied lubricant must
not be used under any circumstances because
of the difference in frictional coefficient.
If a locking compound was specified, no oil
should be applied to the thread.
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