Lutz Size 1 - 1/4", Operating Instructions Manual

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GB
7. Take one diaphragm and invert (reverse the natural bow of the material) and with the curved side of the inner
diaphragm plate (33) facing the diaphragm assemble onto outer diaphragm plate stud (9) and then screw
assembly into diaphragm rod. Push diaphragm rod to opposite side of intermediate and add the opposite dia-
phragm assembly. Tighten the outer diaphragm plates to 8 Nm of torque. After tightening, reverse the inverted
diaphragm back to its original state, allowing the outer bead to seat in the groove of the intermediate.
Caution!
Inverting the first diaphragm aids reassembly.
8. When positioning outer diaphragm chambers onto intermediate make sure that witness lines are matching.
Caution!
If air valve has been removed, proper orientation of air system with fluid chambers must be observed. The
bottom of the intermediate has the smaller hook shaped air passage slot on the air valve mounting face and
the outer chamber check ball cavity should be pointing downward.
9. Tighten all external fasteners to final torque requirement after pump is completely assembled.
0. Position the manifolds making sure of the proper orientation in relation to the air valve for your application.
Also make sure that the manifold o-rings do not shift from their grooves during reassembly. Tighten all external
fasteners to final torque requirement after pump is completely assembled.
3.5.3 External fastener torque requirements
Caution!
When reassembling, loosely tighten all external fasteners adjusting and aligning and gradually, in an alternat-
ing fashion, tighten to torque requirements listed below.
Air valve cap screws 4.5 Nm
Manifold bolts 0.0-.3 Nm
Outer chamber cap screws 8.5-9.5 Nm
Maintenance Model 1/2", Bolted Version