Andritz MC - Fasteners

Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 MAINTENANCE Kap.7 , Seite 5 of 22
GRZ-2698573-v1-Maintenance.FM
7.5 Fasteners
Screw/bolt
material
Bolts and screws are manufactured in several classes of material. The
heads of these screws and bolts are marked to show the strength class.
Damaged or lost fasteners should only be replaced with fasteners of the
same material.
Check Unless they are suitably tightened, screws/bolts can work loose or fail
under operating conditions. This is why all connecting screws/bolts must
be checked in the course of maintenance work.
• During the first six months: every 2 to 2½ months
• After the first six months: 6-monthly
Tighten During checks and maintenance work it is imperative to tighten all
connecting screws/bolts to the torque specified for each one in the
drawings or in the table below.
Pre-stressing forces and tightening torques in the table apply to normal
screwed/bolted connections. Please contact Andritz AG if you have
special requirements.
The thread and screw head should be lubricated with an appropriate
lubricant (for example Molyslide Plus from Loctite).
Tab. 7-5 Tightening Torques and Pre-stressing Forces for Rigid Screws(Normal thread)
CAUTION
Wrong torque tightening may cause machine damage and hazards
leading to personal injury.
The pre-loads and tightening torques above
must be observed.