12
7 Maintenance
Procedures
Intervals
Remarks
Before opening, check and
clean the manhole surface
and screw connections.
Before each use.
Tighten/loosen the screw
connections using only the
Allen key supplied for the
purpose.
Check the cover damping
pad.
Once per year.
Replace if damaged.
Clean the cover damping
pad.
After each use.
Sweeping it off with a
broom is sufficient.
Check the fit of the lock
washers.
After each use.
Treat screw connections in
the cover with anti-seize
paste before screwing in.
Recommended tightening
torque = 32 Nm.
After each use.
Screw in screw
connections by hand only!
Anti-seize paste is
available from Langmatz.
(For info, see section 13
Contacts).
Check the cover and the
non-slip coating.
After every use.
Replace if damaged.
