{"product_id":"samson-pm45-60-repair-kit-3-1-6-1-npt-lower-valve-kit-539301","title":"Samson PM45\/60 Repair Kit - 3:1\/6:1 NPT Lower Valve Kit #539301","description":"\u003cdiv class=\"gleam-quick-specs\" style=\"background: #f5f5f5; border-radius: 5px; padding: 16px 20px; margin: 0 0 16px 0; font-family: Roboto,sans-serif;\" role=\"region\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #283c92; font-size: 16px; margin: 0 0 12px 0; border-bottom: 2px solid #283c92; padding: 0 0 6px 0;\"\u003eSpecifications\u003c\/div\u003e\n\u003cdiv class=\"gleam-tablewrap\" style=\"overflow-x: auto; margin: 0; padding: 0;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border-spacing: 0; font-size: 14px; margin: 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92; width: 45%;\"\u003eSamson Part #\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003e539301\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #eef0f9;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003eNPT Lower Valve Repair Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92;\"\u003eFits PM45\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003ePumpMaster 45 - 3:1 Ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #eef0f9;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92;\"\u003eFits PM60\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003ePumpMaster 60 - 6:1 Ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92;\"\u003eConnection Configuration\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003eNPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #eef0f9;\"\u003e\n\u003ctd style=\"padding: 7px 12px; font-weight: 600; color: #283c92;\"\u003eService Area\u003c\/td\u003e\n\u003ctd style=\"padding: 7px 12px;\"\u003eLower Fluid-Section Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gleam-description\" style=\"font-family: Roboto,sans-serif; color: #333; max-width: 900px;\"\u003e\n\u003ch2 style=\"color: #283c92; font-size: 18px; margin-top: 0;\"\u003eSamson PM45 3:1 \/ PM60 6:1 NPT Lower Valve Repair Kit #539301\u003c\/h2\u003e\n\u003cp\u003eGenuine Samson lower valve repair kit for specific PumpMaster 45 and PumpMaster 60 oil pump configurations. Part #539301 services the lower fluid-section valve on \u003cstrong\u003ePM45 3:1\u003c\/strong\u003e and \u003cstrong\u003ePM60 6:1\u003c\/strong\u003e pumps with the applicable NPT configuration.\u003c\/p\u003e\n\u003cp\u003eThe lower valve is part of the pump's fluid-handling section and helps control one-way fluid movement during each pumping cycle. This kit is intended for rebuilding that valve when internal components become worn or require service.\u003c\/p\u003e\n\u003cdiv style=\"background: #eef0f9; border-radius: 5px; padding: 16px 20px; margin: 16px 0;\"\u003e\n\u003cp style=\"margin: 0; font-size: 14px;\"\u003eQuestions before ordering? Call \u003ca href=\"tel:+18178653707\" style=\"color: #283c92; font-weight: 600;\"\u003e(817) 865-3707\u003c\/a\u003e and our team will help confirm your PumpMaster ratio and the correct lower-section repair kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #283c92; font-size: 15px; border-bottom: 2px solid #283c92; padding-bottom: 6px;\"\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px;\"\u003eFor Samson PumpMaster 45 pumps with a 3:1 ratio and PumpMaster 60 pumps with a 6:1 ratio using the applicable NPT lower-section configuration. This is \u003cstrong\u003enot a universal PM45\/PM60 kit\u003c\/strong\u003e; verify your pump ratio before ordering.\u003c\/p\u003e\n\u003cdiv class=\"gleam-faq\" role=\"region\"\u003e\n\u003ch3 style=\"color: #283c92; font-size: 16px; border-bottom: 2px solid #283c92; padding-bottom: 6px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 5px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003ch3 style=\"background: #eef0f9; color: #283c92; margin: 0; padding: 14px 18px; font-size: 15px;\"\u003eWhich pumps use repair kit #539301?\u003c\/h3\u003e\n\u003cp style=\"padding: 14px 18px; margin: 0; font-size: 14px; line-height: 1.7; color: #333;\"\u003eThis lower valve kit is intended for compatible PM45 3:1 and PM60 6:1 pumps with the specified NPT configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 5px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003ch3 style=\"background: #eef0f9; color: #283c92; margin: 0; padding: 14px 18px; font-size: 15px;\"\u003eWhat part of the pump does it rebuild?\u003c\/h3\u003e\n\u003cp style=\"padding: 14px 18px; margin: 0; font-size: 14px; line-height: 1.7; color: #333;\"\u003eIt services the lower valve in the fluid section of the pump. It does not rebuild the air motor or replace all lower-section seals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 5px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003ch3 style=\"background: #eef0f9; color: #283c92; margin: 0; padding: 14px 18px; font-size: 15px;\"\u003eWill this fit a PM45 6:1 or PM60 12:1?\u003c\/h3\u003e\n\u003cp style=\"padding: 14px 18px; margin: 0; font-size: 14px; line-height: 1.7; color: #333;\"\u003eNo. Those higher-ratio configurations use a different lower valve kit. Confirm the ratio shown on your pump before selecting a repair kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Which pumps use repair kit #539301?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This lower valve kit is intended for compatible PM45 3:1 and PM60 6:1 pumps with the specified NPT configuration.\"}},{\"@type\":\"Question\",\"name\":\"What part of the pump does it rebuild?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It services the lower valve in the fluid section of the pump. It does not rebuild the air motor or replace all lower-section seals.\"}},{\"@type\":\"Question\",\"name\":\"Will this fit a PM45 6:1 or PM60 12:1?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Those higher-ratio configurations use a different lower valve kit. Confirm the ratio shown on your pump before selecting a repair kit.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n.gleam-quick-specs .gleam-tablewrap,.gleam-quick-specs .table-wrapper{margin:0!important;padding:0!important;}\n.gleam-quick-specs table{margin:0!important;padding:0!important;border-spacing:0!important;border-collapse:collapse!important;}\n.gleam-quick-specs table tbody,.gleam-quick-specs table tr{margin:0!important;padding:0!important;height:auto!important;}\n.gleam-quick-specs table td,.gleam-quick-specs table th{padding:7px 12px!important;line-height:1.35!important;height:auto!important;vertical-align:middle!important;}\n.gleam-quick-specs{padding:16px 20px!important;margin-bottom:16px!important;}\n\u003c\/style\u003e","brand":"Samson","offers":[{"title":"Default Title","offer_id":53663690916133,"sku":"ALMSAM539301","price":185.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/0037\/9685\/files\/Samson_OEM-Part.jpg?v=1787192936","url":"https:\/\/alamoequipment.com\/products\/samson-pm45-60-repair-kit-3-1-6-1-npt-lower-valve-kit-539301","provider":"Alamo Equipment Service","version":"1.0","type":"link"}