{"id":323,"date":"2026-07-18T22:31:54","date_gmt":"2026-07-18T22:31:54","guid":{"rendered":"https:\/\/oayachtservice.com\/knowledgebase\/?post_type=docs&#038;p=323"},"modified":"2026-07-26T13:15:27","modified_gmt":"2026-07-26T13:15:27","password":"","slug":"headhunter-tw-hmx-chemical-injection-pump-troubleshooting","status":"publish","type":"docs","link":"https:\/\/oayachtservice.com\/knowledgebase\/?docs=headhunter-tw-hmx-chemical-injection-pump-troubleshooting","title":{"rendered":"HeadHunter TW-HMX Chemical Injection Pump Troubleshooting"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Stenner Chemical Dosing Pump Diagnostic Guide<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Overview<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Stenner Chemical Injection Pump<\/strong> is an integral component of the <strong>HeadHunter TW-HMX Sewage Treatment System<\/strong>, providing accurate dosing of treatment chemicals required for proper wastewater processing and system performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the chemical injection pump is not operating correctly, the HMX system may experience insufficient chemical dosing, poor treatment efficiency, increased maintenance requirements, or system alarms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This troubleshooting guide is intended to assist vessel operators and technicians in diagnosing common chemical dosing issues before replacing components or requesting service.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Common Symptoms<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This guide addresses conditions including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Low chemical dosing.<\/li>\n\n\n\n<li>No chemical injection.<\/li>\n\n\n\n<li>Pump motor operating but not delivering chemicals.<\/li>\n\n\n\n<li>Air trapped in the chemical supply line.<\/li>\n\n\n\n<li>Intermittent dosing.<\/li>\n\n\n\n<li>Loss of prime.<\/li>\n\n\n\n<li>Empty chemical reservoir.<\/li>\n\n\n\n<li>Chemical feed line restrictions.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Before Beginning Troubleshooting<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Prior to diagnosing the chemical pump:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verify the chemical storage tank contains sufficient treatment chemical.<\/li>\n\n\n\n<li>Confirm all suction and discharge tubing is properly connected.<\/li>\n\n\n\n<li>Inspect tubing for kinks, cracks, or leaks.<\/li>\n\n\n\n<li>Ensure the pump has electrical power.<\/li>\n\n\n\n<li>Verify the HMX system is calling for chemical injection.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many dosing problems are caused by air entering the suction line, blocked tubing, or an empty chemical supply rather than pump failure.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Common Items to Inspect<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The following should be checked during diagnosis:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chemical reservoir level.<\/li>\n\n\n\n<li>Suction tubing.<\/li>\n\n\n\n<li>Injection tubing.<\/li>\n\n\n\n<li>Pump rollers and tubing assembly.<\/li>\n\n\n\n<li>Check valves.<\/li>\n\n\n\n<li>Injection fitting.<\/li>\n\n\n\n<li>Electrical connections.<\/li>\n\n\n\n<li>Pump operation during an active dosing cycle.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Preventative Maintenance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Routine inspection of the Stenner pump will help ensure reliable chemical delivery and reduce unexpected service interruptions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended maintenance includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Regularly checking chemical levels.<\/li>\n\n\n\n<li>Inspecting tubing for wear or deterioration.<\/li>\n\n\n\n<li>Cleaning the injection point as required.<\/li>\n\n\n\n<li>Replacing worn pump tubes at the manufacturer&#8217;s recommended intervals.<\/li>\n\n\n\n<li>Verifying proper chemical flow during routine vessel maintenance.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Preventative maintenance significantly improves dosing accuracy and extends the service life of the chemical injection system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Reference Documentation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The following pages contain the manufacturer&#8217;s troubleshooting procedures for the <strong>Stenner Chemical Injection Pump<\/strong> used on the HeadHunter TW-HMX Sewage Treatment System.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the diagnostic sequence provided to identify the source of low or no chemical injection before replacing components. This systematic approach helps minimize downtime and ensures proper operation of the vessel&#8217;s sewage treatment system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/oayachtservice.com\/KBMedia\/hmxchem.png\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Need Assistance?<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">For technical support, warranty assistance, parts, or to schedule service:<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Ocean Alexander Yacht Service<br><\/strong>East Coast Yacht Group<br>2955 W State Road 84 Fort Lauderdale FL, 33312<br>954-530-2033<br>\ud83c\udf10<br><strong><a href=\"http:\/\/www.oayachtservice.com\/\">oayachtservice.com<\/a><\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Follow us for maintenance tips, technical updates, and service announcements:<br><a href=\"https:\/\/www.instagram.com\/eastcoastyachtgroup\/\">&nbsp;<strong>Instagram<\/strong><\/a><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>This article is part of the Ocean Alexander Yacht Service Knowledge Base. Information is provided for general guidance and should not replace the applicable Owner&#8217;s Manual or service procedures.<\/em><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">\u00a9 Ocean Alexander Yacht Service \u2013 East Coast Yacht Group, Inc.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Stenner Chemical Dosing Pump Diagnostic Guide Overview The Stenner Chemical Injection Pump is an integral component of the HeadHunter TW-HMX Sewage Treatment System, providing accurate dosing of treatment chemicals required for proper wastewater processing and system performance. If the chemical injection pump is not operating correctly, the HMX system may experience insufficient chemical dosing, poor &#8230; <a title=\"HeadHunter TW-HMX Chemical Injection Pump Troubleshooting\" class=\"read-more\" href=\"https:\/\/oayachtservice.com\/knowledgebase\/?docs=headhunter-tw-hmx-chemical-injection-pump-troubleshooting\" aria-label=\"Read more about HeadHunter TW-HMX Chemical Injection Pump Troubleshooting\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[5],"doc_tag":[],"class_list":["post-323","docs","type-docs","status-publish","hentry","doc_category-plumbing"],"year_month":"2026-09","word_count":440,"total_views":"4","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"admin","author_nicename":"oaadmin","author_url":"https:\/\/oayachtservice.com\/knowledgebase\/?author=1"},"doc_category_info":[{"term_name":"Plumbing","term_url":"https:\/\/oayachtservice.com\/knowledgebase\/?doc_category=plumbing"}],"doc_tag_info":[],"_links":{"self":[{"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/docs\/323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=323"}],"version-history":[{"count":3,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/docs\/323\/revisions"}],"predecessor-version":[{"id":379,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=\/wp\/v2\/docs\/323\/revisions\/379"}],"wp:attachment":[{"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=323"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=%2Fwp%2Fv2%2Fdoc_category&post=323"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/oayachtservice.com\/knowledgebase\/index.php?rest_route=%2Fwp%2Fv2%2Fdoc_tag&post=323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}