Bibby Scientific Stuart RE3011C Instructions De Service page 14

Maintenance and Servicing
6.2.1 Disassembly
1. Disconnect the power supply and ensure that it cannot be switched on again.
2. Open the screw clamps of the hoses on the pump body with the SW 17 open spanner.
3. Remove four machine screws (1) from each connection head with an Allan key, size 4.
4. Lift off the pressure plate (2), the connection head (3) and the pump head (6). The valve
gasket (5) and diaphragm (8) are now freely exposed.
5. Loosen the diaphragm (8) at the strain washer (7) by turning the size 3 pin type face
wrench anticlockwise.
6. Clean the valve gasket (5) the pump head (6) and the diaphragm (8) with a soft cloth and
acetone.
7. Check that the drive is in good working order.
Fig. 5 Disassembly, Assembly
Renew defective parts, if necessary! Wear protective gloves!
Parts must be renewed at the intervals stated in this Operating Manual or as speci-
fied by the user internally! Do not clean with compressed air!
6.2.2 Assembly (see Fig. 5)
1. Place the pump so that the diaphragm is lying in a horizontal position.
2. Use the size 3 pin-type face wrench to tighten the pressure disc (9), the diaphragm (8)
and the strain washer (7) with the correct torque of 2 - 4 Nm.
3. Bring the connecting rod (5) (see Fig. 6) and the diaphragm (8) into the central position.
4. Replace the pump head (6).
5. Insert the valve (5) and the O-ring (4).
Ensure that they are lying completely flat. Do not insert the burred side facing the sealing
surface. Align the connection head flush with the pin.
6. Replace the pressure plate (2) and insert and tighten the 4 machine screws with a torque
of 3 - 4 Nm.
7. Reattach the hose connections with clamping ring screw fittings.
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WARNING !
RE3011C