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Tools required:
Tool kit: Order no. 402106, consists of:
•
Order no. 826801
Pin type face wrench, adjustable, size 3,
•
Order no. 826801-6
Hex wrench, size 4mm,
•
Order no. 826801-5
Open spanner, size 17mm.
Disassembly
1. Open the screw clamps (9) of the hoses (10) on the pump body with the size 17 open spanner.
2. Remove four machine screws (1) from each connection head with an Allan key, size 4.
3. Lift off the connection head (2) and the pump head (5). The valves (3), O-rings (4) and diaphragm (7) are now freely
exposed.
4. Loosen the diaphragm (7) at the strain washer (6) by turning the size 3 pin type face wrench anticlockwise.
5. Clean the valves (3), the pump head (5) and the diaphragm (7) with a soft cloth and acetone.
6. Check that the drive is in good working order.
Fig. 2 Disassembly, assembly
Assembly (see Fig. 2)
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 (8), the diaphragm (7) and the strain washer (6) with the
correct torque of 5 - 6 Nm.
3. Bring the connecting rod (see Fig. 3) and the diaphragm (7) into the central position.
4. Replace the pump head (5).
5. Insert the valves (3) and the O-rings (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. Tighten the four machine screws (1) symmetrically with a torque of 3 to 4 Nm.
7. Reattach the hose connections (10) with clamping ring screw fittings (9).
Test
Connect a vacuum gauge to the intake connection and measure the ultimate pressure.
The pump must not make any abnormal noises. Moving parts must not touch each other. If the repair was successful and
the pump is working properly, then a fully warm pump should attain the specified ultimate pressure stated in the
specifications data.
Maintenance by the Manufacturer
Repairs and maintenance going beyond the extent of the work described above or reconditioning or modification may only
be performed by the manufacturer or authorized dealer.