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

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6. Clean or replace any components that have excessive wear, dirt build-up, or chemical attack. Lube all compo-
nents prior to reassembling. Reassemble pilot sleeve spacers (4), o-rings (4) and lip seals (48) within bore
of intermediate. Make sure that the open side of the lip seals (48) is facing outward toward the diaphragms.
Also make sure that the end pilot spacers (4) are at the end on either side of the pilot sleeve assembly and all
inner spacers (47) are separated by o-rings (46). Next carefully insert the diaphragm rod assembly (3.5) with
pilot sleeve (45) inside the assembly in the bore. Reattach retaining plates (49). Do not overtighten self-tapping
screws (38).
7. Assemble diaphragm (3) (and optional Teflon overlay (30)) and inner diaphragmm plate (33) onto outer dia-
phragm plate stud (9). Then screw assembly into diaphragm rod. Push diaphragm rod to opposite side of in-
termediate and add the opposite diaphragm assembly. Tighten the outer diaphragm plates to 8 Nm of torque.
8. Assemble the outer chamber (8) and band clamps (6) first on the side where the diaphragm is fitted on the
intermediate. Lightly tighten fasteners at band clamp. Push opposite diaphragm towards intermediate and fix
second outer chamber. 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 top of the intermediate has a single vertical air passage slot on the air valve mounting face while the outer
chamber check ball cavity should be pointing downward.
9. When positioning band clamps use soapy water or a compatible lubricating spray on the inside of band clamps
to aid assembly. Tap with a mallet on the outside of clamp to help position the clamp while tightening the fasten-
ers. The band clamp fasteners are stainless steel. To prevent galling always apply anti-seize compound to the
thread. Tighten all external fasteners to final torque requirement after pump is completely assembled.
0. Position the reassembled manifolds making sure of the proper orientation in relation to the air valve for your
application. Also make sure that the valve seat o-rings do not shift from their grooves during reassembly. Flat
washers should be placed under the head of each cap screw and nut. Concave side of tension washers used in
non-metalllic pumps only should face each other.
3.6.3 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.
Band clamps (outer chamber) 8 Nm
Band clamps (manifolds) 9 Nm
Outer chamber cap screws: Non-metallic pumps 5 Nm
Metallic pumps Nm
Maintenance Model 1", Band Clamp Version