{"title":"Solenoids\/Contactors","description":"\u003cp\u003eEQ Systems offers hydraulic lifting \u0026amp; leveling systems for the RV, horse trailer, motorsports, \u0026amp; commercial industries including options for hydraulic landing gear. With EQ Harness, we also offer custom wire harnesses.\u003c\/p\u003e\n","products":[{"product_id":"contactor-2994","title":"Contactor #2994","description":"\u003ch3\u003eReversing contactor, EQ Systems part 2994\u003c\/h3\u003e\u003cp\u003eThe reversing contactor is the heavy duty switch that sends battery current to the pump motor and reverses the polarity to change the direction the motor runs. Bi-directional pumps use it to drive jacks and slide rooms both ways from one motor.\u003c\/p\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed on the following pumps: S101T*5334, S101T*5338, S100T*5151, S100T*5161\u003c\/li\u003e\n\u003cli\u003eListed as the solenoid for the 2727, 2754, 3040, 3041 and 3043 pump assemblies, which use motor 2751\u003c\/li\u003e\n\u003cli\u003eA direct replacement on trailers and motorized units where 2994 is the existing part\u003c\/li\u003e\n\u003cli\u003eSupplied inside the \u003ca href=\"\/products\/replacement-hydraulic-pump-3195ks\"\u003e3195KS\u003c\/a\u003e pump assembly, alongside reservoir 3329K, fill cap \u003ca href=\"\/products\/cap-fill-part-3330\"\u003e3330\u003c\/a\u003e and motor \u003ca href=\"\/products\/replacement-motor-3332\"\u003e3332\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTesting the old contactor\u003c\/h4\u003e\u003cp\u003eIf a voltmeter is not to hand, jump battery voltage from the battery terminal on the contactor to each of the small outer terminals in turn. One should click the contactor in and run the motor in the extend direction, the blue wire terminal, and the other should run it in retract, the green. If neither does and power and ground to the contactor are good, the contactor is defective.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIf you test the motor directly with jumper cables, remove the wires from the motor studs first and refit the nuts.\u003c\/strong\u003e Leaving them connected creates a dead short to ground through the contactor and wiring, at very high current, which will damage both.\u003c\/p\u003e\u003ch4\u003eDocuments\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Motor-Solenoid-Contactor-Relay-Replacement-Chart-TM.pdf\" target=\"_blank\"\u003eMotor Solenoid, Contactor and Relay Replacement Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/TS-Motor-Solenoid-for-EQ-Hydraulic-Pumps-TM.pdf\" target=\"_blank\"\u003eMotor and Solenoid Troubleshooting for EQ Hydraulic Pumps (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Required-Maintenance-Items-Hydraulic-Systems-EQ-TM.pdf\" target=\"_blank\"\u003eRequired Maintenance Items for EQ Systems Hydraulic Jacks and Slide Systems (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EQ Systems","offers":[{"title":"Default Title","offer_id":43958754246715,"sku":"2994","price":131.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2608\/6971\/files\/2994-RVU-scaled.webp?v=1786537071"},{"product_id":"relay-2735","title":"Relay #2735","description":"\u003ch3\u003eCube relay, EQ Systems part 2735\u003c\/h3\u003e\u003cp\u003eThe cube relays switch the pump motor on bi-directional 12 volt pumps. Two are used per pump, one for each direction of motor rotation, so a fault in one can leave a system that extends but will not retract, or the reverse.\u003c\/p\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed on the following pumps: S100T*5151, S100T*5161\u003c\/li\u003e\n\u003cli\u003eListed as the solenoid for the 2727 and 2754 pump assemblies, which use motor 2751\u003c\/li\u003e\n\u003cli\u003eTwo relays per pump\u003c\/li\u003e\n\u003cli\u003eA direct replacement where 2735 is the existing part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eDiagnosing\u003c\/h4\u003e\u003cp\u003eA system that runs one direction only is the classic symptom. Check for the switch signal reaching both relays before condemning either: the fault is often upstream in the switch, the harness or the control panel. Where the motor will not run in either direction and both relays test good, look at the motor and its cables. These pumps draw heavy current, so a tired battery presents as an electrical fault.\u003c\/p\u003e\u003ch4\u003eDocuments\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Motor-Solenoid-Contactor-Relay-Replacement-Chart-TM.pdf\" target=\"_blank\"\u003eMotor Solenoid, Contactor and Relay Replacement Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/TS-Motor-Solenoid-for-EQ-Hydraulic-Pumps-TM.pdf\" target=\"_blank\"\u003eMotor and Solenoid Troubleshooting for EQ Hydraulic Pumps (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Required-Maintenance-Items-Hydraulic-Systems-EQ-TM.pdf\" target=\"_blank\"\u003eRequired Maintenance Items for EQ Systems Hydraulic Jacks and Slide Systems (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EQ Systems","offers":[{"title":"Default Title","offer_id":43958754312251,"sku":"2735","price":19.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2608\/6971\/files\/2735-RVU-scaled_57c230ad-c806-4bb6-89ad-43b6ae2810f4.webp?v=1786537072"},{"product_id":"replacement-solenoid-7055","title":"Replacement Solenoid #7055","description":"\u003ch3\u003eReplacement solenoid, EQ Systems part 7055\u003c\/h3\u003e\u003cp\u003eSolenoid 7055 is the replacement for SPX units fitted with the smart start solenoid. Every other EQ Systems uni-directional unit uses solenoid \u003ca href=\"\/products\/solenoid-1444\"\u003e1444\u003c\/a\u003e; the smart start SPX units are the exception, and this is the part for them.\u003c\/p\u003e\u003ch4\u003eThis is not a direct replacement\u003c\/h4\u003e\u003cp\u003eThe Motor Solenoid, Contactor and Relay Replacement Chart lists 7055 for trailers as a non direct replacement. \u003cstrong\u003eWiring instructions are included with your order\u003c\/strong\u003e and must be followed, because the connections differ from the solenoid coming off. Separate instruction sheets exist for motorhome and trailer installations.\u003c\/p\u003e\u003ch4\u003eIdentifying an SPX unit\u003c\/h4\u003e\u003cp\u003eSPX pumps carry a DG or DE model number on the sticker, as opposed to the S series or KS numbers used on MTE pumps. Note that parts support for SPX units is limited: reservoirs and most covers are no longer available, so if the pump has other problems it is worth asking EQ Systems about a replacement assembly before investing in individual parts.\u003c\/p\u003e\u003ch4\u003eDocuments\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Motor-Solenoid-Contactor-Relay-Replacement-Chart-TM.pdf\" target=\"_blank\"\u003eMotor Solenoid, Contactor and Relay Replacement Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/TS-Motor-Solenoid-for-EQ-Hydraulic-Pumps-TM.pdf\" target=\"_blank\"\u003eMotor and Solenoid Troubleshooting for EQ Hydraulic Pumps (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Reservoir-Replacement-Chart-Feb-2023-TM-1.pdf\" target=\"_blank\"\u003eReservoir Replacement Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EQ Systems","offers":[{"title":"Default Title","offer_id":43958754377787,"sku":"7055","price":146.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2608\/6971\/files\/7055-RVU-scaled.webp?v=1786537073"},{"product_id":"solenoid-1444","title":"Solenoid #1444","description":"\u003ch3\u003eMotor solenoid, EQ Systems part 1444\u003c\/h3\u003e\u003cp\u003eThe motor solenoid is the heavy duty switch that carries battery current to the pump motor when the control panel or switch calls for it. Part 1444 is the standard solenoid across EQ Systems uni-directional systems, listed in the parts books as SOLENOID-HD PLTD, and it is one of the parts supplied inside the \u003ca href=\"\/products\/replacement-hydraulic-pump-2542ks\"\u003e2542KS\u003c\/a\u003e pump assembly.\u003c\/p\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAll EQ Systems uni-directional units use solenoid 1444, except SPX units with the smart start, which use \u003ca href=\"\/products\/replacement-solenoid-7055\"\u003e7055\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eA direct replacement on trailers and motorized units where 1444 is already fitted\u003c\/li\u003e\n\u003cli\u003eOn some motorized units it is not a direct swap and wiring instructions are supplied with the order\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTesting before replacing\u003c\/h4\u003e\u003cp\u003eThe control panel sends 12 VDC to the solenoid on the blue wire, pin 11 of the 12 pin connector on the older platform. If the solenoid clicks but the motor does not turn, the fault is more likely the motor or its cables than the solenoid. If nothing happens at all, check for battery voltage at the solenoid main stud and for the signal at the small stud. Power and ground to the pump must be clean: the ground to the pump stud and the positive cable to the motor solenoid are the two connections EQ Systems calls out for annual inspection.\u003c\/p\u003e\u003ch4\u003eDocuments\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Motor-Solenoid-Contactor-Relay-Replacement-Chart-TM.pdf\" target=\"_blank\"\u003eMotor Solenoid, Contactor and Relay Replacement Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/TS-Motor-Solenoid-for-EQ-Hydraulic-Pumps-TM.pdf\" target=\"_blank\"\u003eMotor and Solenoid Troubleshooting for EQ Hydraulic Pumps (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/cdn\/shop\/files\/Required-Maintenance-Items-Hydraulic-Systems-EQ-TM.pdf\" target=\"_blank\"\u003eRequired Maintenance Items for EQ Systems Hydraulic Jacks and Slide Systems (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EQ Systems","offers":[{"title":"Default Title","offer_id":43958754574395,"sku":"1444","price":120.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2608\/6971\/files\/1444-RVU.webp?v=1786537074"}],"url":"https:\/\/eqsystems.us\/collections\/solenoids-contactors.oembed","provider":"EQ Systems","version":"1.0","type":"link"}