EWIKON HPS III, Operating Manual

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131 HPS-III-Heißkanalsystem_Instandhaltung-Nadelausbau_BA_V-2-0_EN
Maintenance
Picture 110: Screw in threaded rod to disassemble valve pin re-
tainer and valve pin
z342-22
4. After unscrewing the screw the valve pin retainer
(pos. 7.7) becomes visible. Screw a threaded rod
(pos. c) into the valve pin retainer and connect it with
a striking weight (pos. d, see chapter „5.3.1 Tools and
operating materials“).
5. Use the striking weight to untighten the valve pin retai-
ner. Then pull out the valve pin retainer with valve pin
(pos. 17) carefully and without tilting.
6. Replace the valve pin with the new one.
7. Screw the threaded rod into the valve pin retainer again.
8. Insert the new valve pin (pos. 17) carefully and without
tilting. Apply axial load only. Tilting or bending caused by
lateral load must be avoided. Slowly push the valve pin
through the manifold and the valve pin guide in the tip
insert of the nozzle until the valve pin retainer (pos. 7.7)
sits at the bottom of the drive unit.
9. Slide the disassembly sleeve (pos. e, see chapter „5.3.1
Tools and operating materials“) over the threaded rod
(pos. c, see chapter „5.3.1 Tools and operating materi-
als“) and use it to fix the valve pin retainer with gentle
pressure. Unscrew the threaded rod and remove the
disassembly sleeve.
10. Screw the screw (pos. 7.6) in again by using the allen
key (pos. b, see chapter „5.3.1 Tools and operating
materials“) and the tubular hexagon spanner (pos a, see
chapter „5.3.1 Tools and operating materials“). Tigh-
ten with matching torque. See chapter „9.4 Tightening
torques for screws to fix the valve pin in the valve pin
retainer“.
Drive units with pistons - deinstallation und exchange of valve pins