4 November 2005
641P026-008
HMB-8 / HMB-8.7 Mechanism
©
(formerly HMB-11)
Page 16
8 Manually Charging the Operating Mechanism
Upon a malfunction with a failure of the pump motor a hand
emergency pump can be used to charge the operating
mechanism (Illustration 2).
The following hand emergency pump is recommended for
this operation:
• Make: HAWE, Type HE 4
• Manufacturer: Heilmeier und Weinlein, Munich
• Maximum pressure: 600 bar
• Weight: 4.8 kg
• Discharge connector: R 1/4”
• Suction side connector: R 1/4”
Further necessary material:
• High-pressure hose with connectors R 1/4”
and M 16x1.5,
• Low-pressure hose with connectors R 1/4”
and M 18x1.5.
The following procedure shall be observed (Figure 5.1-7):
1. The hand emergency pump shall be fastened so that
the operating lever of the pump can be easily handled.
2. The screw caps of the oil drain valve and the high-
pressure connector (screw coupling with integrated
non-return valve) shall be removed.
Important: Keep any dirt or debris away from the open
end of the hoses and the connecting plugs of
the pump.
3. The suction side of the hand emergency pump, marked
by “S”, shall be connected to the oil drain valve with the
low-pressure hose.
4. The high-pressure hose shall be connected to the
high-pressure side of the pump, marked by “P”.
5. Open the oil drain valve and pump until oil comes out
of the high-pressure hose.
6. Connect the free end of the high-pressure hose to the
high-pressure connector of the operating mechanism.
7. Now the charging operation can be started. For opening
(O) or closing (C) the disc spring assembly shall be
tensioned by at least the values indicated in Table 3.
4-BMH
mmniO52
mmniC11
8-BMH
mmniO52
mmniC9
Table 3
Tensioning the disc spring assembly
8. After the charging, close the oil drain valve, remove the
hoses, and remount the screw caps
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