HARBEN CENTURY, Service Manual

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Flowplant Century Pump Manual
Fig 3.1 Bleeding the pump
3.3.5 To Water Bleed the Pump
CAUTION:
ON NO ACCOUNT OPEN THE WATER BLEED SCREWS WHEN THE PUMP IS
OPERATING UNDER PRESSURE.
Whenever the unit is started after being allowed to run dry, the following procedure must be
followed:
i. Set the selector valve to the recycle (dump) position and start the engine/motor. Run
at 750 rpm tick-over to prime, or inch electric motor (on/off).
Note: If the unit is fitted with a shut-down protection device, hold in the override button
for 10 seconds (allows engine oil pressure to build up).
ii. The pump is self-priming. If, however, any difficulty is experienced, stop engine,
loosen the upper bleed nipples and allow water to flow from each nipple (ensure that
the header tank remains full). Tighten nipples and repeat the procedure detailed in
i .
To identify the bleed nipples, refer to Fig 3.1.
iii. When the operator has taken up a working position, move the selector lever to the
High Pressure position and increase engine speed to reach working pressure.
Note: If the delivery line vibrates this indicates that air is still in the system. Stop the
unit and repeat the procedure detailed in i .
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