dosatron DM11F Operating instructions

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Step 3: Next grasp the plunger, twist it ¼ turn counter
clockwise. Pull straight out to remove.
Step 2: Remove stem by grasping and pulling
straight down.
This DM11F Troubleshooting will cover: The medicator is clicking, but
not drawing the solution or liquid is going down into the stock tank.
DM11F Troubleshooting - Part 1
NOTE: Before you start, make sure the unit is clicking.
Step 1: Unscrew and remove the stem nut.
Scan the QR
code to watch
our DM11F
Troubleshooting
video.

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Step 4: Set the Medicator down and inspect the plunger
seal (J009) for nicks, grooves, or wear.
Step 5: You can also test by taking the stem and
inserting the plunger and then pulling it out. It should
make a pop sound. If not or if you see damage, it is
denitely time to replace the plunger seal (J009).
Step 6: Now unscrew and remove the check valve nut.
DM11F Troubleshooting - Part 1

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DM11F Troubleshooting - Part 1
Step 9: Once you have the parts out, make sure they are
not damaged, gummy, sticky, or missing. If the parts are
dirty, you can clean and re-install. But if they are dam-
aged or missing it’s time to replace. Remember to keep
these parts clean and in good shape so your check valve
will do its job.
Step 8: Grasp the white retainer (PDI739) and twist it ¼
turn counter clockwise to release the check valve parts.
Remove the spring and the cone. Inspect the o-ring
(JDI105) and replace if worn or scored.
NOTE: The DM11F Mini Maintenance Kit (PJDI900MINI-LS)
includes:
You may also purchase these parts separately.
Step 7: Pull the check valve straight out. It may be a bit
snug, but it will slide out.
• Check valve spring (MDI358)
• Check valve cone o-ring (JDI105)
• Medicator Rx (Cleanser-LS)
• Plunger seal (J009)
• Top guide (PDI739)
• Check valve cone (PDI729)
• Silicone (Dosa-Lube)

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DM11F Troubleshooting - Part 1
Step 12: Replace the retainer (PDI739) by aligning it and
turning it a ¼ turn clockwise to lock.
Step 11: Slide the spring (MDI358) over the top of the
neck of the cone.
Step 10: To reassemble, put the cone (PDI729) back into
the check valve.

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DM11F Troubleshooting - Part 1
Step 15: Next, take the check valve nut and thread it
back onto the stem.
Step 14: Reinstall the check valve into the stem.
Step 13: Before reinstalling the check valve, pull on the
top to make sure it stays together.

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Step 18: Now, reinstall the stem.
Step 17: Test the connection, by pushing and pulling the
plunger. It should click.
DM11F Troubleshooting - Part 1
Step 16: Insert the plunger into the housing, press it in
as far as it will go and twist ¼ turn clockwise to lock.

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Step 20: One last thing . . . take a look at the top of the
suction tube. If it looks like it ares out, cut an inch or so
off and replace. Or, if the suction tube is cracked, has
holes, is rigid, or looks really old, replace.
Step 19: Hand tighten the stem nut.
DM11F Troubleshooting - Part 1
Note: To watch the video go to Dosatron’s DM11F video page: https://www.youtube.com/
watch?v=Xw0aY3WfLXk or the YouTube Channel: www.youtube.com/user/DosatronIntl
Dosatron International, Inc.
2090 Sunnydale Blvd. • Clearwater, FL 33765
800-523-8499 • www.dosatronusa.com