dosatron D14MZ3000 Operating instructions

Page 1
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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 3: Slide the ferrule back.
Step 2: If there is still no suction, unscrew the suction hose nut
and remove the suction hose.
NOTE: To troubleshoot your Dosatron D14MZ3000, you will need
a pair of needle nose pliers and a strap wrench.
Step 1: Take a look at the strainer. If it’s clogged, just clean it and
re-test your Dosatron unit.
D14MZ3000 Troubleshooting - Part 1
This D14MZ3000 - 14 GPM Troubleshooting Part 1 will cover: The injector is clicking,
but not drawing the concentrate.
Scan the QR code to
watch our D14MZ3000 -
Troubleshooting video.

Page 2
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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 6: Then, insert the hose into the barb, and hand-tighten the
nut. By the way, if the hose is cracked, rigid, or looks really old just
replace it now.
Step 5: Reposition the ferrule.
Step 4: Cut a half inch off the top of the hose.
D14MZ3000 Troubleshooting - Part 1

Page 3
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 8: Press the air bleed button of the bell housing a few times
to release the pressure.
Step 7: After you have reinstalled the suction hose, you should
start to see the liquid begin moving up the hose. If the liquid isn’t
moving up the hose after a minute or so, turn the water off.
D14MZ3000 Troubleshooting - Part 1
Step 9: Unscrew the suction hose nut, remove hose and
set aside.

Page 4
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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 11: Then, pull the injection stem straight out from the body of
the injector and set aside.
D14MZ3000 Troubleshooting - Part 1
Step 10: Unscrew the injection stem nut and remove.
Step 12: Take a close look at the plunger rod and seal.
NOTE: Make sure the rod is straight and that the seal is free of
nicks, scratches or wear. If the plunger or seal is damaged or you
don’t remember the last time you changed it, just replace it now.

Page 5
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 13: To change the plunger assembly (Part #: PJDI138),
grasp the white plunger rod and pull it down as far as it will go.
D14MZ3000 Troubleshooting - Part 1
Step 14: Position the needle nose pliers near the
top of the plunger.
Step 15: Then, quickly and carefully twist the plunger counter
clockwise and remove.

Page 6
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D14MZ3000 Troubleshooting - Part 1
Step 16: To install the new plunger assembly (Part #: PJDI138),
align the top of the plunger with the retainer.
Step 18: To nish up, carefully slide the injection stem assembly
onto the plunger.
Step 17: Then, use the needle nose pliers and twist it a quarter
turn clockwise to lock.

Page 7
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D14MZ3000 Troubleshooting - Part 1
Step 19: Align the notches in the lower part of the blue body with
the two teeth on the top of the injection stem assembly.
Step 21: Now, slide the hose into the barb and
hand-tighten the nut.
Step 20: Then, thread on the injection stem nut, hand tight.

Page 8
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D14MZ3000 Troubleshooting - Part 1
Step 22: To make sure the hose is connected securely, give it a
pull. If it comes off easily, you may need to cut a half inch off the
top of the hose, reset the ferrule and reattach the hose nut. Slowly
turn the water on and it should begin drawing the concentrate.

Page 9
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 3: Grasp the white threaded barb and pull the check valve
assembly straight out.
Step 2: Unscrew and remove the check valve nut.
Step 1: Remove the hose nut and hose and set aside.
D14MZ3000 Troubleshooting - Part 2
This D14MZ3000 -14 GPM Troubleshooting Part 2 will cover: The injector is clicking,
but water is going down into the tank.

Page 10
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 6: Then, carefully lift the retainer from the seal. You are
checking to see if there is anything lodged or stuck.
NOTE: To inspect the check valve, carefully lift the cone
from the retainer.
Step 5: Look at the bottom side of the cone.
Step 4: It usually comes out in two pieces. Set the unit aside.
D14MZ3000 Troubleshooting - Part 2