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dosatron D25RE09, Troubleshooting Manual, Page: 1 / 15

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Page 1

800-523-8499

www.dosatronusa.com

Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.

Step 3:

 Check to see if you feel suction on your finger.

Step 2: 

If the unit is still not drawing the concentrate, unscrew and 

remove the hose nut and hose.

D25RE09 - Troubleshooting - Part 1

This D25RE09 - 11 GPM Troubleshooting Part 1 will cover: The injector is clicking, but 

not drawing the concentrate.

Scan the QR code to 

watch our D25RE09 -         

Troubleshooting video. 

NOTE: 

To service your D25RE09 you will need a strap wrench  

(Part #: TOOL01) and a Phillips head screwdriver. 

Step 1:

 If your Dosatron is clicking but not drawing the 

concentrate, it could be as simple as the strainer is plugged 

with debris. Take a look at the strainer, if it’s clogged just clean it.  

Then, turn on the water and re-test your Dosatron unit.

P421

Piston shell

J020

Push rod o-ring

JDI098

Injection stem o-ring 

M238

Actuator springs

JDI106

Plunger seal

PJDI026

Check valve assembly

Summary of Contents for D25RE09

Page 1: ...or is clicking but not drawing the concentrate Scan the QR code to watch our D25RE09 Troubleshooting video NOTE To service your D25RE09 you will need a strap wrench Part TOOL01 and a Phillips head screwdriver Step 1 If your Dosatron is clicking but not drawing the concentrate it could be as simple as the strainer is plugged with debris Take a look at the strainer if it s clogged just clean it Then...

Page 2: ...he water off and press the air bleed button on the lid a few times to release the pressure Step 4 If you feel suction cut a half inch off the top of the hose and reattach it But if the hose is cracked rigid or looks really old just replace it After you reinstall the suction hose you should see the liquid begin moving up the hose If you don t see liquid moving up the hose after a minute or so or yo...

Page 3: ...and roll it off of the plunger Install the new seal into the groove Step 8 Take a close look at the plunger seal Part JDI106 for nicks scratches or wear If you see damage or don t remember the last time you changed the seal just replace it now D25RE09 Troubleshooting Part 1 Step 7 Grasp the white valve support and pull the piston straight out of the body Set the body aside ...

Page 4: ...wear and aprons are recommended when disassembling a Dosatron Step 11 Replace the lid hand tight Slowly turn the water on and the unit should begin to click It should be drawing the concentrate D25RE09 Troubleshooting Part 1 Step 10 Carefully insert the piston back into the body ...

Page 5: ...pull the check valve assembly straight out It usually comes out in two pieces Step 2 Unscrew and remove the check valve nut Step 1 It s time to investigate the check valve To do this remove the hose nut and hose Set them aside D25RE09 Troubleshooting Part 2 This D25RE09 11 GPM Troubleshooting Part 2 will cover The injector is pushing water down into the concentrate tank ...

Page 6: ...s one piece and shouldn t be disassembled D25RE09 Troubleshooting Part 2 Step 5 To investigate the check valve carefully lift the cone from the retainer Look at the bottom side of the cone Step 6 Then carefully lift the retainer from the seal If you see anything lodged or stuck remove it If the spring is deformed or stretched you will need to replace the complete check valve assembly ...

Page 7: ...thread the suction hose nut onto the hose Slide it onto the barb and hand tighten the nut This should stop the water from going back into the concentrate tank Step 8 Press it into the stem as shown Hand tighten the check valve nut Step 7 To re assemble place the check valve assembly Part PJDI026 into the top of the barb D25RE09 Troubleshooting Part 2 ...

Page 8: ...rench to loosen the lid Then remove and set it aside Step 1 Turn the water off and press the air bleed button on the top of the lid a few times to release the pressure D25RE09 Troubleshooting Part 3 This D25RE09 11 GPM Troubleshooting Part 3 will cover The injector isn t clicking Step 3 Grasp the white valve support and pull the piston straight out of the body ...

Page 9: ... Part M238 on the bottom If they are broken or missing just replace them Step 4 Inspect the white valve support on the top and press the pushrod down D25RE09 Troubleshooting Part 3 Step 6 You can visually inspect the upper and lower flanges on the piston shell If they are worn or have deep scratches the piston shell Part P421 and push rod o ring Part J020 need to be replaced ...

Page 10: ...ell use a small tip Phillips screwdriver and remove the valve support screw Step 7 Also check the piston shell s fit inside the body To do this invert the piston and slide it into the body It should be a snug fit If it feels loose the piston shell Part P421 and push rod o ring Part J020 need to be replaced D25RE09 Troubleshooting Part 3 Step 9 Remove the plastic retainer ...

Page 11: ...sassembling a Dosatron D25RE09 Troubleshooting Part 3 Step 12 Pull the actuator assembly out and discard the old piston shell Step 11 Next remove the four screws in the center of the piston shell to release the actuator assembly Step 10 Press the pushrod up and slide the valve support off the inlet valve and set aside ...

Page 12: ...hen disassembling a Dosatron Step 13 Put the new push rod o ring on top of the push rod and slide it down as far as it will go Step 14 Position the actuator assembly in the shell as shown and hold firmly Step 15 Now re install the four screws and hand tighten them in a star pattern D25RE09 Troubleshooting Part 3 ...

Page 13: ...ended when disassembling a Dosatron Step 16 Press the white plastic portion of the actuator side to side If there is movement re tighten the screws Step 17 Reinstall the valve support by sliding it onto the inlet valve Step 18 Position the retainer and hand tighten the screw D25RE09 Troubleshooting Part 3 ...

Page 14: ...ommended when disassembling a Dosatron Step 21 Hand tighten the lid Your Injector should now be clicking and drawing concentrate Step 20 Insert the piston back into the body Step 19 Test the piston by pressing the pushrod from the top and bottom it should click each time D25RE09 Troubleshooting Part 3 ...

Page 15: ...as gloves eye wear and aprons are recommended when disassembling a Dosatron D25RE09 Troubleshooting Part 3 To learn more scan the QR codes below for more information Scan the QR code to go to Dosatron s video page Scan the QR code to go to Dosatron s YouTube Channel ...

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