4 November 2005
641P026-008
HMB-8 / HMB-8.7 Mechanism
©
(formerly HMB-11)
Page 12
9.
Disconnect the hose from the mechanism.
10. Proceed to section 4.3.6.1 to add oil to the mechanism,
if necessary.
11. Operate the mechanism several times. If the oil level
reduces noticeably, discharge the mechanism and
return to step 10. This procedure will also remove any
trapped air pressure in the reservoir.
Important:
When reattaching the mechanism cover
51028, torque the cover bolts to 3 Nm.
4.3.6
Refilling the Mechanism with Oil
A mechanism either can be topped off with hydraulic oil if
the level is low (section 4.3.6.1) or the mechanism can be
refilled with hydraulic oil after the oil has been drained
(section 4.3.6.2).
The oil grades listed below are the specified grades to be
used when filling the HMB mechanism with oil.
Trade name:
Esso UNIVIS J 13 or Aero Shell Fluid 4
ABB designation:
GPHL730041R0001 or ED4.1.3326
Notice:
Only use the recommended oils listed above.
There are no other equivalents or substi-
tutes.
Oil types can be mixed.
4.3.6.1 Topping Off a Mechanism with Hydraulic Oil
To top off a mechanism that is low with hydraulic oil:
1.
Remove the mechanism cover 51028.
2.
Be sure that the mechanism is in the OPEN position
and the pressure inside the mechanism is equalized
as described in section 4.1.1.
Plate 3: Oil Fill Port and cap
3.
Remove the cap from the oil fill port 51127 (Plate 3).
4.
Add clean, filtered hydraulic oil (as specified in section
4.3.6) into the oil fill port until the oil level is between 1/
4 to 1/2 of the window for vertically-oriented mecha-
nisms or 1/3 to 1/2 of the window for horizontally-
oriented mechanisms. The oil level can be distin-
guished by its red color against a metallic background.
Important:
Hydraulic oil added to the mechanism must
be filtered. Clean, filtered oil is essential to
proper operation.
5.
Re-install the cap to the oil fill port.
Important:
When reattaching the mechanism cover
51028, torque the cover bolts to 3 Nm.
4.3.6.2 Refilling a Mechanism that Has Been Drained
To refill a mechanism that has been drained of hydraulic oil:
1.
Remove the mechanism cover 51028.
2.
Be sure that the mechanism is in the OPEN position.
3.
Remove the cap from the oil fill port 51127 (Fig. 1).
4.
Evacuate the mechanism as described in section
4.3.5.
5.
Connect a clean hose to the outlet of the oil drain valve
51013 (a special Ermetto fitting will be required).
6.
Insert the other end of the hose into a container filled
with a least 3 liters of clean, filtered hydraulic oil (as
specified in section 4.3.6).
Important:
An in-line filter must be inserted into the hose.
7.
While the vacuum is still being applied, slowly throttle
open the oil drain valve 51013 allowing the vacuum to
draw the oil from the container into the mechanism.
Important:
Draw the oil in very slowly to prevent the oil
from foaming into the vacuum pump.
Fill Port
Pressure Equalization
Handle
Summary of Contents for Mechanism HMB-8
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Page 5: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 5 4 November 2005 ...
Page 19: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 19 4 November 2005 NOTES ...
Page 33: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 33 4 November 2005 NOTES ...
