Retsch PM400 - Servicing the clamping unit; Wear to the bases of the clamping unit

Cleaning, wear and service
49
8.1.1 Servicing the clamping unit
Fig.
31
: Servicing the clamping unit
• Check that the threaded spindle (Gs) and locking sleeve (N1) can move
freely.
– In most cases a drop of oil will help.
The smooth running of the threaded spindle and locking sleeve is the prerequisite
for the secure clamping of the grinding jars.
Locking sleeves which do not slide down automatically through spring force cannot
reliably prevent the threaded spindle from coming loose. The grinding jars may be
ejected.
8.1.2 Wear to the bases of the clamping unit
Fig.
32
: Wear to the bases of the clamping unit
• Check the thickness (D1) of the three lead frame bases regularly for wear (at
least monthly).
– The thickness (D1) of the three lead frame bases must not be less than
7mm.
– Operational safety can no longer be guaranteed if the thickness falls below
this value (D1). The grinding jars may be ejected.
Gs
N1
D1: at least 7mm