ABB Aztec 600 Manual page 7

Referring to Fig. 4.6:
8. Remove 2 screws K and remove measurement cell top
cover L.
Fig. 4.6 Removing the measurement cell top cover
Referring to Fig. 4.7:
9. Disconnect motor wiring plug M.
Fig. 4.7 Disconnecting the motor
Referring to Fig. 4.8:
10. Remove 4 screws N and remove motor and sample tube
O from the lower half of the measuring cell.
Fig. 4.8 Removing the motor and sample tube
Referring to Fig. 4.9:
11. Slide sample tube P off piston assembly Q. Discard the
12. Loosen retaining grub screw R and unscrew piston
Fig. 4.9 Removing the piston
4.4 Fitting the piston assembly
Referring to Fig. 4.10:
1. Lightly lubricate new O-ring T and piston seal U with
2. Fit the O-ring and piston seal to new piston base V.
3. Insert the piston base, complete with seal and O-ring, into
4.
5.
6. Remove O-ring Z from the base of the motor mounting
7. Fit new O-ring Z ensuring it is located correctly in the
8. Fit the sample tube over the piston assembly and slide it up
Fig. 4.10 Fitting the piston assembly
Aztec 600 | Piston assembly | Single- and multi-stream colorimetric analyzers | SI/ANAINST/001-EN
sample tube.
assembly Q from piston shaft S, clean the piston
assembly using DI water and return it to the factory.
the silicon grease from the piston kit.
the new piston top W and secure loosely with new piston
cone adjusting screw X and spring washer Y.
IMPORTANT (NOTE)
Do not tighten the piston cone adjusting screw
at this stage.
Insert new piston assembly Q into the top of new sample
tube P and, holding the piston firmly, tighten piston cone
adjusting screw X until a continuous seal is achieved
between piston seal U and sample tube P.
Remove the piston assembly from the sample tube and
refit it to piston shaft S. Fit and tighten new retaining grub
screw R.
plate and discard.
groove in the base of the motor mounting plate.
until it contacts O-ring Z.
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