17 Make sure that both the end piece gasket and the wiper are in
position. Insert the two support rods into the holes in the end
piece. When the glass cylinder is properly seated, tighten the two
M3 nuts gently.
18 Refit the pump cylinder assembly. Check that the end piece
rinsing tubing connector points towards you. Connect the inlet
and outlet tubings to the pump cylinder assembly. Check the
assembly alignment and the connections carefully to eliminate the
risk of glass cylinders bursting when pressure is applied.
19 Tighten the locking screw for the pump cylinder assembly and
pull the piston rod to the end piece.
20 Switch on the pump with the mains power switch on the front
panel. After the selftest, run the pump at a low flow rate so that
the piston rod slips into the hole in the driving arm. Continue to
run the pump until the 6-port pump valve switches. Just as the
valve switches, stop the pump.
21 Engage the piston rod in the driving arm by tightening the stop
screw with the Allen key.
22 Fill the rinsing system with 20% ethanol and replace the rinsing
tubing.
23 Replace the tubing cover, the protective cover over the piston rod
and the perspex cover. Make sure that no capillary is stuck
between covers and the pump housing.
24 Run in the new sealings as described in section 2.8 Running-in
the new pump.
WARNING! Hands and fingers risk being squeezed between the
piston driving arm and the pump housing when running the pump
without the protective covers fitted.
Pump P-920
User Manual 18-1125-54 Edition AB
21
Maintenance
4
Rinsing
tubing
connector
Piston rod
Outlet connector
Inlet connector
Locking screw
Pump cylinder assembly
End piece
Pull
18-1125-54_ab.qxd 1998-10-22 12:49 Sida 21 (1,1)
