Maintenance - Moog D671 Serie Benutzerinformation, Montage- Und Inbetriebnahme-Hinweise

8 Maintenance

Except for a regular visual inspection for exterior leakage and
filter change, no maintenance work on the valves is required.
Changing the filter: The installed filter protects internal ori-
fices and nozzles against coarse particle contamination. The
valve response time will increase as contamination increases.
The filters located below the filter cover at the side may be re-
placed by the customer.
WARNING
Changing the filter
Cleaning serves no purpose.
WARNING
(Only for D661/5)
Fluid flow through the filter disk (2) is from inside to
outside leaving particles behind the filter disk (2) and
cannot be seen from the outside after removing the
filter cover (4).
WARNING
 Before beginning work, clean the outside of the
valve around the filter cover!
• Remove hexagon socket screws (5) with a wrench and
remove the filter cover (4). Remove the filter disk (2),
which is now accessible, with tweezers or a fine screw-
driver.
1
2
3
4
Fig.: Principles of construction
• Check O-rings (1) and (3) and replace if necessary.
• Install new filter disk. To do this, first insert the O-Ring
(1), then the filter disk (2) so that the side of the filter disk
with the indentation faces the outside. Insert O-ring (3) in
the filter cover (4) with some clean grease and mount.
• Cross-torque screws to:
Type Series
Pilot valve/ D671
Proportional valve
• After start-up, check valve for external leakage.
Mounting and Installation Notes D671/2/3/4/5 (B97072-67x-001; Version E, 07/13)
5
Torque
Screw [Nm] (lbf in)
M5 x 8–10.9 8.34 (73.8)
Applies only with D061 pilot valve
• Loosen pilot valve (2) from the main stage (1). Remove
the filter disk (4), which is now accessible, with tweezers
or a fine screwdriver.
2
1
Fig.: Construction
• Check O-rings (3) and (5) and replace if necessary.
• Install new filter disk. To do, first insert the O-Ring (5),
then the filter disk (4) and O-ring (3) so that the side of
the filter disk with the indentation faces the outside.
• Cross-torque screws to:
Type Series
Pilot valve D061
• After start-up, check valve for external leakage.
Replacing O rings: The mounting surface O rings may be re-
placed by the customer (on the pilot valves and the way valves
as well). The O rings of the pilot valve and the way valve of the
D671 with ServoJet® pilot valve must not be replaced by the
customer. Pay attention to cleanliness of the valve and of the
surroundings.
Transportation: Before transporting a valve the valve ports
have to be sealed with a clean shipping plate or adhesive tape.
Package the valve carefully to prevent damage during trans-
portation.
Repairs: Repairs may only be carried out by us or by our au-
thorized service centers.
Repaired valves or replacement valves are delivered like
new valves with factory settings. Therefore, the valves have
to be checked for correct configuration and changed parame-
terization before re-initiation. If necessary, the user has to re-
store the machine manufacturer's original configuration and
parameterization.
9 Disposal
It is essential to comply with the relevant national waste dis-
posal regulations and environmental protection provisions
when disposing of valves, spare parts or accessories, packag-
ing that is no longer needed, hydraulic fluid or auxiliary materi-
als and substances used for cleaning!
5
4
3
Torque
Screw [Nm] (lbf in)
M5 x 30–10.9 8.34 (73.8)
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