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D25F Troubleshooting - Part 3
Step 17: Next, position the retainer and hand tighten the screw.
Step 18: Test the piston, by pressing the pushrod from the top and
bottom, it should click each time.
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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 16: If there is no movement, reinstall the valve support by
sliding it onto the inlet valve.