Siemens PolyBlend PB200-2 Manual page 16

Type I – Push on Knob
Rezeroing and Stroke Knob Disassembly and
Assembly
1. Remove stroke knob from the pump by
grasping the knob firmly and pulling it toward
you.
2. Pry off the yellow cap.
3. Place the knob on a flat surface.
4. Using needle nose pliers, squeeze the
inner section up together while lifting the outer
section up.
5. Push the inner section back onto the "D"
shaped stroke shaft.
6. With the pump running, zero the pump by
turning the inner section of the knob counter
clockwise until the pump stops clicking.
7. Position the outer section of the knob so
that the pointer aligns with zero on the nameplate
or end of the black or red band.
8. Push down on the outer section (a snap
sound indicates parts are locked together).
9. Replace the yellow cap over the outer
section of the knob, aligning the tabs on the cap
with the slots inside the knob.
Type III Collet Knob
Rezeroing and Stroke Knob Disassembly and
Assembly
1. Remove yellow cap.
2. Hold knob with soft jaw pliers.
3. Disconnect knob by loosening 5/16"
(8mm) collet nut. There is no need to remove nut.
4. Remove knob by pulling towards you.
5. With pump running, zero the pump using
a screwdriver to turn the stroke shaft counter-
clockwise until the pump just stops clicking.
6. Pump is now zeroed.
7. Position knob at zero, or the end of the low
range band, and tighten 5/16" (8mm) collet nut.
8. Replace yellow cap.
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