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

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6
GB
Maintenance Model 3/8", Band Clamp Version
3.3.3 Air Valve Assembly Inspection
Caution!
Only one side of the mechanism has a hard-stop. Shifting the mechanism past its operating position can
cause the spring to pop free and many small components to come loose. Use caution when shifting the
mechanism manually.
0. If there has been a diaphragm rupture and fluid has entered the air side of the pump, the complete air system
should be inspected. Remove the air valve assembly () by unscrewing the screws (9).
. Clean or replace the air valve assembly if there is excessive wear, dirt build-up or chemical attack. Inspect for
proper shifting of the spring mechanism by manually pushing the metal spring retainer from one side to the
other.
. To reassemble the air valve, first shift the spring mechanism to the
side with the hard-stop. Next, prop the spring retainer into a more
neutral position by inserting a 3 mm hex key as shown between the
hard-stop and the spring retainer.
3. With the rod guide () positioned such that the opened end is facing
the air valve assembly opening, slide the air valve assembly in place
so that the forks slide into the rod guide. Once the fork of the spring
retainer is in the rod guide, pull the hex key free and push the air valve
assembly fully into place. Finally, reinsert and tighten the air valve
assembly screws to the torque listed below.
Caution
Past this point, the
spring and mechanism
parts will come free.
When manually shifting
the mechanism, firmly
hold the spring top
shown to avoid the
spring coming loose.
Hard-stop