0

Dosatron D45RE15 Troubleshooting Video


Hi, I’m Jason and welcome to . . . Dosatron University. Today, Dosatron’s troubleshooting video
series features the D45RE15–20 GPM Injector. In this video, I will use a strap wrench, #1 and #2 Philips screwdrivers a flat blade screwdriver, and needle nose pliers. It’s best to perform troubleshooting in
a clean area or if your injector is in-line, cover your stock tank so you won’t lose
any of the parts. The three key areas in troubleshooting are: One- The Injector is not drawing the concentrate, but is clicking Two- The Injector is pushing water down into your stock solution tank, but is clicking Number three-The Injector is not clicking The first two are the most common. If your Injector 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 is clogged,
clean it out and re-test your Dosatron. If there is still no suction, but the injector
is clicking, turn the water on. Unscrew and remove the suction hose nut and hose. Then check to see if you feel suction on your finger. 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 hose. If you don’t see liquid moving up the hose
or you didn’t feel suction on your finger, turn the water off. Open a valve downstream
to release the pressure. Unscrew the suction hose nut and remove the suction hose. Set both aside. Now, unscrew the 4 screws around the injection sleeve. Pull the injection stem assembly straight down and out of the lower housing. Grasp the plunger and pull it straight down. 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, consider replacing the plunger seal now. To change the plunger seal, pinch and roll
it off of the plunger. Install the new seal into the groove on the plunger. To reinstall the injection stem, slide it
into the lower housing and align the four screws in the metal retainer and body. Hand tighten the screws carefully. 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. 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. Unscrew and remove the check valve barb. Remove the check valve seal, cone and spring. Inspect all of the check valve parts. 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, now is a good time to replace them. Insert the new check valve spring
into the new cone and press it into the stem Now position the new check valve seal with the groove side up inside the check valve barb and hand tighten. Thread the suction hose nut onto the hose, slide it onto the barb and hand tighten the nut. This should stop the water from dripping back into the concentrate tank. If the Injector isn’t clicking, we need
to investigate the piston. Unscrew and remove the suction hose nut and hose. Using the strap wrench, loosen the body nut and remove. Pull the lower housing straight down Lift the piston up and out of the lower
housing. Set the lower housing aside. Inspect the white valve support on the bottom. Press the push rod down and check the two actuator springs on the top If they are broken or missing, they will have to be replaced. You can check the piston shell two ways: first by inspecting the upper and lower flanges to see if they are worn or have deep scratches. The second test is to check the piston shell’s fit inside the housing. To do this, slide the piston into the upper housing. It should be a snug fit. Now slide the piston into the lower housing. It should also be snug fit. If it feels loose or is worn, the piston shell
to be replaced. To replace the piston shell, use a #1 Phillips screwdriver and remove the valve support screw and plastic retainer. Then, remove the four screws around the plunger rod. Press the push rod up and pry the valve support off the inlet valve with a flat blade screwdriver and set aside. Next, remove the four screws in the center of the piston shell to release the actuator assembly. Pull the actuator assembly out and discard the old piston shell. Using the needle nose pliers, position the
four screws in the center of the new piston shell. Then, position the actuator assembly
in the shell as shown and hold firmly. Now hand-tighten the four screws in a star pattern. Press the white plastic portion of the actuator side to side. If there is movement, re-tighten the screws. Reinstall the valve support by sliding it
onto the inlet valve. Next, position the retainer and hand tighten the screw. Then re-install the four screws in the black plastic retainer and align the pin in the plunger rod as shown. Carefully, hand-tighten
them in a star pattern. Test the piston, by pressing the pus hrod from the top and bottom, it should click each time. To finish up, make sure the push rod is in
the down position and carefully slide the piston into the lower housing about half way. Inspect the large o-ring in the groove on
top of the lower housing and carefully press the piston into the upper housing Align the housing and hand-tighten the body nut. Thread the suction hose nut onto the hose, slide it onto the barb and hand tighten the nut. Slowly turn the water on and your injector
should now be clicking and drawing concentrate. That’s all for now. We hope this video has
been helpful in troubleshooting your D45RE15 Injector. For more information, please us a call at 800-523-8499 or visit us online at dosatronusa.com. To see our other videos, check out our YouTube channel or visit the video page on our website. I’m Jason and this is… Dosatron University. Thanks for watching.

Bernard Jenkins

Leave a Reply

Your email address will not be published. Required fields are marked *