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6. Check the delivery hose for other blockages (see Section 9.5.2).
7. Make sure that there is no residual pressure in the delivery hose.
− A pressureless hose is soft and flexible.
− If there is residual pressure, the hose is firm.
8. Loosen the couplings of the delivery hose in which the blockage was.
9. Loosen the blockage by tapping, shaking and bending.
10. Shake the blockage out of the delivery hose.
Several blockages
Sometimes there are several blockages in the delivery hose.
1. Deform the delivery hose to determine whether the delivery hose is
depressurized.
2. If there is a residual pressure, e.g. between two blockages in the
delivery hose, move the delivery hose back and forth, tap the delivery
hose and thereby help to reduce the residual pressure and thus to
loosen the blockage.
3. Make sure that the delivery hose can be deformed easily over its entire
length.
4. Loosen the couplings of the delivery hose in which the blockage was.
5. Loosen the blockage by tapping, shaking and bending.
6. Shake the blockage out of the delivery hose.
7. If there is other blockage in the delivery hose, repeat this procedure.
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