dosatron D45RE15 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: You should see the liquid begin moving up the suction
hose. If you don’t see liquid moving up the hose or you didn’t
feel suction on your nger, turn the water off. Open a valve
downstream to release the pressure.
Step 2: Then, check to see if you feel suction on your nger.
If so, just cut 1/2” off your suction hose and reattach.
NOTE: To service your Dosatron D45RE15, you will need a strap
wrench, a # 1 and 2 phillips head screw driver, a at blade screw
driver and needle nose pliers.
Step 1: To begin, make sure the strainer is clear of debris. While
the unit is still installed, turn the water on. Unscrew and remove
the suction hose nut and hose.
D45RE15 Troubleshooting - Part 1
This D45RE15 Troubleshooting will cover: The injector is clicking, but not drawing
solution or liquid is going down into the stock tank.
Scan the QR code to
watch our D45RE15 -
Troubleshooting video.
TOOL-
KIT
Tool Kit
P170 Check valve spring
J051 Check valve seal
M072 Check valve cone
M221 Actuator Springs (2)
TOOL01 Strap Wrench

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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 6: Pull the injection stem assembly straight down and out of
the lower housing.
Step 5: Now, unscrew the four screws around the injection sleeve.
Step 4: Unscrew the suction hose nut and remove the suction
hose. Set both aside.
D45RE15 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: If you see damage, or don’t remember the last time
you changed the plunger seal, consider changing the seal
(Part #: J009) now. To change the plunger seal, pinch and roll it off
of the plunger.
Step 8: Take a close look at the plunger seal for knicks, scratches,
or ware.
Step 7: Grasp the plunger and pull it straight down.
D45RE15 Troubleshooting - Part 1

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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 12: Hand tighten the screws carefully.
Step 11: To reinstall the injection stem, slide it into the lower
housing and align the four screws and the metal retainer into
the body.
Step 10: Install the new seal into the groove onto the plunger.
D45RE15 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 13: Now, thread the suction hose nut onto the hose, slide the
hose onto the barb and hand tighten the nut. Slowly, turn the water
on and your injector should now be drawing the concentrate.
D45RE15 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.
D45RE15 Troubleshooting - Part 2
Step 2: Unscrew and remove the check valve barb.
Step 1: If your injector is pushing water down into the concentrate
tank, it’s time to investigate the check valve. To do this remove the
hose nut and hose and set aside.
Step 3: Remove the check valve seal (Part #: J051),
cone (Part #: M072) and spring (Part #: P170).

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www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D45RE15 Troubleshooting - Part 2
Step 6: Now, position the new check valve seal with the groove
side up inside the check valve barb.
Step 5: Insert the new check valve spring into the new cone and
press it into the stem.
Step 4: Inspect all the check valve parts. If they are dirty, you may
be able to soak, brush off, and reinstall. If you see damage or you
don’t remember the last time you changed these parts, now is a
good time to replace them.

Page 8
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D45RE15 Troubleshooting - Part 2
Step 9: Slide it onto the barb and hand tighten the nut. This should
stop the water from dripping back into the concentrate tank.
Step 8: Thread the suction hose nut onto the hose.
Step 7: Hand tighten.

Page 9
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D45RE15 Troubleshooting - Part 3
Step 2: Using the strap wrench, loosen the body nut and remove.
Step 1: Unscrew and remove the suction hose nut and hose.
Step 3: Pull the lower housing straight down.
This D45RE15 Troubleshooting will cover: The injector isn’t clicking.

Page 10
800-523-8499
www.dosatronusa.com
Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
D45RE15 Troubleshooting - Part 3
Step 5: Inspect the white valve support on the bottom.
Step 4: Lift the piston up and out of the lower housing.
Set the lower housing aside.
Step 6: Press the push rod down and press the two actuator
springs (Part #: M221) on the top. If they are broken or missing,
they will have to be replaced.