dosatron D 25 F 1 Operating instructions

Page 1
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www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 3: Then, remove the hose.
Step 2: If there is still no suction, turn the water on. If the
Medicator is clicking, unscrew and remove the suction hose nut.
NOTE: To service your D25F Medicator you will need a strap
wrench (Part #TOOL01) and a small tip Phillips head screwdriver.
Step 1: If your Medicator is clicking, but not drawing concentrate,
it could be as simple as the strainer is plugged with debris. Take
a look at the strainer. If it is clogged, clean it out and re-test your
Dosatron.
D25F Troubleshooting - Part 1
This D25F Troubleshooting will cover: The Medicator is not drawing the concentrate,
but is clicking.
Scan the QR code
to watch our D25F
- Troubleshooting
video.

Page 2
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 6: If you don’t see liquid moving up the tube or you don’t feel
suction on your nger, turn the water off. Press the air bleed button
on the lid a couple times to release the pressure.
Step 5: If you feel suction, just cut a half inch off the top of the
hose and reattach. You should see the liquid begin moving up the
suction tube.
Step 4: Check to see if you feel suction on your nger.
D25F 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 9: Grasp the white valve support and pull the piston straight
out of the body.
Step 8: Unscrew to remove.
Step 7: Using a strap wrench (Part #: TOOL01), loosen the lid.
D25F Troubleshooting - Part 1

Page 4
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 12: Install the new seal (Part #: J009) into the groove.
Step 11: To replace the seal, pinch and roll it off of the plunger.
Step 10: Take a close look at the plunger seal for nicks, scratches,
or wear. If you see damage or don’t remember the last time you
changed the seal, just replace it now.
D25F Troubleshooting - Part 1

Page 5
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 14: Replace the lid, hand tight. Your Medicator should now
be drawing the concentrate.
Step 13: Carefully, insert the piston into the body.
D25F Troubleshooting - Part 1 D25F Troubleshooting - Part 1

Page 6
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 3: Unscrew and remove the check valve barb.
Step 2: Remove the suction hose.
D25F Troubleshooting - Part 2
If your Medicator is pushing water down into the stock solution
tank, it’s time to investigate the check valve.
Step 1: To do this, remove the hose nut.
This D25F Troubleshooting will cover: The Medicator is pushing water down into your stock
solution tank, but is clicking.

Page 7
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D25F Troubleshooting - Part 2
Step 6: Inspect the seal (Part #: J051) and the check valve
assembly (Part #: MPDI122). If they are dirty, you may be able to
soak, brush off, and reinstall. If you see damage or if you don’t
remember the last time you changed these parts, just replace
them now.
Step 5: Then carefully pry the check valve assembly down and out
of the stem. A small at blade screwdriver or pick will make this
easier.
Step 4: Remove the check valve seal (Part #: J051).

Page 8
D25F Troubleshooting - Part 2
Step 8: Place the check valve seal with the groove facing upward
into the new barb.
Step 9: Thread it onto the white stem and hand-tighten.
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 7: To reassemble, press the new check valve assembly into
the stem as far as it will go.

Page 9
D25F Troubleshooting - Part 2
Step 11: Slide it onto the barb.
Step 12: Hand tighten the nut. This should stop the water from
dripping back into the stock tank.
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 10: Thread the suction hose nut onto the hose.

Page 10
D25F Troubleshooting - Part 3
Step 2: Grasp the white valve support and pull the piston straight
out of the body. Set the body aside.
Step 3: Inspect the white valve support on the top.
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 1: If the Medicator isn’t clicking, unscrew and remove the lid.
If it is tight, just use the strap wrench (Part #: TOOL01) to loosen
it. Set the lid aside.
This D25F Troubleshooting will cover: The Medicator is not clicking.