7 Mounting and Connection to the Hydraulic System
Mounting the valves
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 39
7.3.3 Procedure
Safety instructions:
Mounting the valves
Procedure for mounting
the valves
Procedure:
1.
Clean the valve connecting surface and the mounting surface.
Check and if necessary correct the evenness and roughness of the
mounting surface.
Chapter "7.2.1 Surface quality", page 37
2.
Remove the shipping plate from the valve’s hydraulic port.
The shipping plate and the associated fastening elements (screws and
nuts) must be kept for later use, e.g., during transportation.
3.
Check for presence, elasticity, integrity and correct seating of the O-rings
in the valve ports (A, B, P, T, etc.).
If necessary, install O-rings, replace or correct the seating.
4.
Paying attention to the positioning pin, place the valve on the mounting
surface and align with the mounting bores.
5.
Secure the valve. To do so, tighten the installation screws (hexagon
socket head cap screws) free from distortion in diagonal sequence.
Tightening torque: 6.8 Nm (5.0 lbf ft) ± 10 %
Chapter "7.3.2 Specification for installation screws", page 38
WARNING
Use the installation screws specified here for mounting
the valve. The shipping plate attachment screws must not
under any circumstances be used to mount the valve. Se-
cure valve mounting cannot be guaranteed in such a case.
Specification for installation screws:
CAUTION
The valve shipping plate may only be removed from the valve
hydraulic ports directly prior to mounting and must be re-
mounted directly after the valve has been removed. This is the
only way of adequately protecting the valves against the in-
gress of dirt and moisture and protecting the seals against the
effects of ozone and UV.
The shipping plate and the associated fastening elements
(screws and nuts) must be kept for later use, e.g., during trans-
portation.
CAUTION
To prevent the valve from overheating, mount the valve so as
to ensure adequate ventilation.
Do not mount the valve directly on machine parts which are ex-
posed to strong vibrations or sudden movement.
On units that are moved in jerks and jolts, the movement direc-
tion of the spool should not be the same as the movement di-
rection of the unit.
CAUTION
The valve connecting surface and the mounting surface must
be free of residues and dirt when the valve is about to be
mounted.
Use a clean, soft and fluff-free cloth to clean the connecting
and mounting surfaces. Do not use cleaning wool. Do not use
any cleaning agents or methods which could attack the sur-
faces or the O-rings mechanically or chemically.
