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Designed to meet today’s tough service standards, the YELLOW JACKET® Refrigerant Management System (RMS) 3784X for R-134a and 3786X for R-1234yf provide full cycle recovery/recycle/evacuate/recharge to bring the vehicle back to factory specifications. The easy-to-use, portable, full color interface walks you quickly through each step for easy operation and fast service.

Not ready for R-1234yf? Purchase the 3784X for R-134a today and we can update it to R-1234yf later with our optional (one time use) conversion kit.

To obtain pressure readings in a snap, each RMS unit comes with a YELLOW JACKET® ManTooth® Wireless Digital Pressure/Temperature Gauge so you can test the A/C system without losing refrigerant. The free downloadable app wirelessly calculates and displays the A/C system’s actual pressures in an easy-to-read color format on the RMS tablet, as well as iOS or Android™ devices.

Real-time remote support, including set-up/start-up assistance. With the system’s Window’s-based control tablet, we can remotely access your machine and provide training to show you how to use the machine and navigate the screens. All you need is a wireless connection. In addition, we can perform remote diagnostics, including using the tablet to take live video or photographs during the session if you need to show us something specific.

New features and innovative tools may be added to our firmware. To check to see if you have the most up-to-date firmware update, click on the button below.

    • Certified to SAE J3030 (37840 includes SAE J2788)
    • “Charge only” capability for R-134a (not permitted for R-1234yf per standards)
    • High- or Low-side charging
    • Fully automatic air purging constantly monitors and purges non-condensables
    • Fast tank refills with no hose changes
    • 95% efficiency rating
    • Maintenance reminders for oil/filter changes
    • Automatic shut-off for full tank and high pressure situations
    • Heavy-duty shock resistant scale for accurate charging
    • Two-stage, 5 cfm vacuum pump for fast, high efficiency evacuation (7 cfm on 37844)
    • 1/2 hp oil-filled hermetic compressor for speed and reliability
    • Fully factory tested – 34-point quality check
    • Choose from high- or low-side charging for vehicles with only one service fitting
    • For preventative maintenance, the machine alerts the technician to change vacuum pump oil and filters when due
    • SAE J2843™ for R-1234yf requires 98%+ purity for vehicle refrigerant in order to service the vehicle with any RR&R equipment. Contaminated refrigerant is to be recovered with an approved contaminated recovery device before service can be performed Contaminated Refrigerant Recovery System
    • Meets standard requirements for vacuum pull control and system leak test
    • Charge accuracy within 1/2 oz. (14 grams)
    • Automatic oil drain
    • Tablet can print to existing shop printer (requires local area wireless network or USB cable – not included)
    • Digital on-screen pressure readings
    • Built-in self diagnostics
    • Touch screen keypad/interface
    • Optional sealant traps
    • Optional manual oil injector
    • 120V operating system
    • Run time hours tabulated for components
    • Easy tank access for quick removal and changeout
    • 50 pound storage tank (3784x) and 30 pound storage tank (3786x)
    • 10 foot hose (15′ on 37844)
    • One year parts and labor warranty (see warranty statement for exclusions) – tablet follows manufacturer’s warranty
    • Patent Pending
    • Wireless, portable tablet for remote monitoring (can also be used for other business purposes)
    • Logging and storage of jobs for future reference and refrigerant usage
    • Easy to store, built-in hose rack
    • 10-foot premium YELLOW JACKET® PLUS II™ hoses for easy connection to even hard-to-reach fittings – 25% longer than the standard (15′ on 37844)
    • 5 cfm vacuum pump capable of extended pull time periods (7 cfm on 37844)
    • Steel frame for high durability
    • Large oil extraction reservoir
    • Hang hooks for rags, tools, etc.
    • Large magnetic hooks to hold job jacket
    • Four magnetic surfaces and magnets to mount notes/hold items
    • Optional side bag with eight (8) pockets holds full sized notepad, two beverages, cell phone and more
    • Large handles for easy movement
    • Trays for pens, small parts, tools and other misc. items
    • Flat area/ workspace
    • Optional identifier located here
    • 10-foot power cord

    W x D x H
    19.5 x 29 x 45”

    Weight w/o refrigerant
    Approximately 220 lbs.

  • UPCs
    UPC # Description
    37840 Automatic RMS for R-134a with 10′ hose, 5 cfm vacuum pump and Android tablet
    37841 Automatic RMS for R-134a with 10′ hose, 5 cfm vacuum pump, Android tablet and internal identifier
    37844 Automatic RMS for R-134a with 15′ hose, 7 cfm vacuum pump and Android tablet (no identifier)
    37846 Automatic RMS for R-134a with 10′ hose and 5 cfm vacuum pump (no tablet or identifier)
    37866 Automatic RMS for R-1234yf  with 5 cfm vacuum pump, 30 lb. tank, internal identifier and Android tablet
    37867 Automatic RMS for R-1234yf  with 5 cfm vacuum pump, 30 lb. tank and internal identifier (no tablet)
    Optional Accessories
    37842 Oil injector kit for R-134a
    37862 Oil injector kit for R-1234yf
    37845 Conversion kit – R-134a to R-1234yf
    37843 Sealant trap kit for R-134a
    37863 Sealant trap kit for R-1234yf
    37861 Refrigerant analyzer for R12, R-134a and R-1234yf
    37916 Side bag with mounting hardware
    38200 Solenoid valve removal tool
    Replacement Parts
    38201 Android Tablet
    37917 Compressor
    95026 50 lb. DOT R-134a blue recovery tank
    95029 30 lb. DOT/SAE R-1234yf recovery tank
    68954 Replacement oxygen sensor for internal refrigerant identifier
    YJII® Vacuum Pump and Mounting Plate
    93266 YJII® Vacuum Pump 5 CFM 120V
    38164 YJII® Adapter Kit for 3784X/3786X