Hach APA 6000 Maintenance And Troubleshooting Manual page 8

b. Install the ceramic piston guide and tighten until resistance is felt,
then loosen ½ turn so the seal retaining ring can move freely.
c. Fully insert the stainless steel alignment tool.
d. Securely hand-tighten the piston guide into the pump body.
e. Use a wrench to tighten the piston guide to 4.5–9 Nm (40–60 in.-
lb).
f. Pull the alignment tool out of the assembled pump body.
8. Install the pump body assembly on the pump module. Do the
illustrated steps shown in Figure 1
a. Push the assembled unit on the pump piston with the weep hole
at the bottom.
b. Install the knurled lock ring and hand-tighten it. Make sure that
there is no movement of the pump body after the lock ring is
tightened.
c. Install the two tubes to the pump body assembly.
9. Set the power switch to on.
10. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>SOLUTIONS AND CLEANING>PRIMING>PRIME ENTIRE
SYSTEM NOW. Priming takes 7–15 minutes.
Note: When priming starts, a pop-up window shows the time that remains to
complete the prime cycle. When the priming is complete, the analyzer
automatically starts sample measurement.
8 English
in reverse order.
Figure 1 Remove the pump body assembly
Figure 2 Pump body assembly
1 Pump body
2 Weep hole
3 O-ring, fluorocarbon, 0.676-in. ID x
0.070-in. OD
4 Piston seal (2x)
5 Seal retaining ring
6 Piston guide, ceramic