KNF LAB LABOPORT SH820G Manual Del Usuario página 126

Servicing
50
6. Place the pump heads (consisting of head cover (3), inter-
mediate plate (6) with valve plates/seals (4) and pressure
plate (2)) together with the connection tube on the pump
housing according to the pencil line (see Fig. 15).
Make sure that the hose connection (11) is inserted
straight into the inlet separator.
7. Screw in the union screw of the hose connection (11) 1-2
turns by hand.
Fig.15: Fit pump head
8. Tighten the internal cap screw (1) in the center of the
pressure plate (tightening torque: 1 Nm). Care must be
taken not to overtighten this screw.
9. Tighten the screws (4Fig. 11) in a crosswise pattern (tight-
ening torque: SH/SR820G: 4 Nm; SR/SH840G: 5 Nm)
Translation of Originial Operating Instruction, KNF 325562-325564 06/21
Vacuum system SH820G / SR820G SH840G / SR840G