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  • Remanufacturing the HP LaserJet PRO M118 (CF294A/X) Toner Cartridge

    https://static.ombe.com/slir/w235/forums/200/rickpics/josiah_HP_Pro_MFP-148dw/HP_LJ_Pro-M118.jpgBy Mike Josiah and the Technical Staff at Uninet

    The HP LaserJet PRO M118 series of printers are based on a monochrome 30ppm, 1200 Dpi engine. The first page out is stated to be under 6.6 seconds, and all W models so far come with Wi-Fi, Apple AirPrint, HP ePrint, Google Cloud Print, HP Smart App and Wi-Fi Direct Print built in.

    All machines released do far come standard with 256Mb memory and have a duty cycle of 20,000 pages per month.

    This engine uses the fairly new 2 cartridge system for HP Monochrome printers in that there are separate Toner and Drum cartridges. Typically HP/Canon have used all in one type cartridges for monochrome printers. Both the toner and drum cartridges are small and not rated for many pages so even though this is sold as a low volume machine, I believe there will be a decent demand for the cartridges. The cartridges are simple and fast to remanufacture.

    There are two cartridges in this engine the toner (CF294A/X) and the drum cartridge (CF232A). The A toner is rated for 1200 pages, X is rated for 2800 pages and the drum unit is rated for 23,000 pages. The starter toner cartridge that comes with the printer is rated for 1000 pages.


    Printers based on this engine:*

    HP LaserJet PRO M118dw
    HP LaserJet PRO M119n
    HP LaserJet PRO MFP M148dw
    HP LaserJet PRO MFP M148fdw

    Current list pricing for the cartridges:*

    CF294A $46.99*
    CF294X $84.99
    CF232A $88.99*

    * As of 3/1/19


    Required Tools

    1) Toner approved vacuum.
    2) A small Common screw driver
    3) A Phillips head screwdriver

    Required Supplies

    Replacement toner for use in the HP LaserJet Pro M118
    Replacement chip
    Replacement developer roller (optional)
    Replacement DB (optional)
    Conductive Grease


    1) Place the cartridge with the handle facing up. Remove the two screws on the right side end cap. Both of these screws have a left hand thread. See Figure 1

    Figure 1
    Figure 1



    2) Press in on the bottom tab and carefully pry off the end cap. Work the end cap from multiple sides, there is a plastic post that must snap before the end cap will come off. See Figures 2 & 3

    Figure 2
    Figure 2



    Figure 3
    Figure 3



    NOTE: The mag roller Assembly may come off with the end cap.

    3) Remove the two doctor blade screws. Note that the right side screw has a left hand thread! Keep this screw aside in a safe place so that upon re-assembly you know where it is. See Figure 4

    Figure 4
    Figure 4



    4) Remove the doctor blade.

    5) Clean out any remaining toner from the supply chamber. Be careful to clean developer roller seals. See Figure 5

    Figure 5
    Figure 5



    6) If any toner got onto the blue doctor blade seal, clean it with isopropyl alcohol and a foam swab. We do not recommend using a cotton type swab as they can leave threads of cotton behind which can cause a leak. See Figure 6

    Figure 6
    Figure 6



    7) Fill the cartridge with toner approved for use in the HP LaserJet Pro M118 series of printers. See Figure 7

    Figure 7
    Figure 7



    8) Install the doctor blade and two screws. Remember that the right side screw has a left hand thread. See Figure 8

    Figure 8
    Figure 8



    9) Remove the magnet from inside the mag. roller sleeve. See Figure 9

    Figure 9
    Figure 9



    10) Insert the magnet into the slotted bushing on the left side of the cartridge. Be careful to align it properly, forcing the magnet in will break the bushing. See Figure 10

    Figure 10
    Figure 10



    11) Clean the Mag. Roller sleeve with a dedicated mag roller cleaner.

    12) Slide the sleeve over the magnet and press the end cap in place. Make sure the bottom tab snaps inn place. See Figures 11, 12 & 13

    Figure 11
    Figure 11



    Figure 12
    Figure 12



    Figure 13
    Figure 13



    13) Install the two screws in the end cap. Make sure the bottom screw fits into the post. Its easy to have the end cap slightly misaligned and miss the post. See Figure 14.

    Figure 14
    Figure 14



    14) Check to make sure the spring loaded arm moves freely. See Figure 15

    Figure 15
    Figure 15



    15) Replace the chip by pressing down on the locking tabs and sliding the chip out. See Figure 16.

    Figure 16
    Figure 16