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  • Remanufacturing the HP LaserJet Enterprise M607 CF237 Series Toner Cartridges

    https://static.ombe.com/slir/w155/forums/200/rickpics/josiah_HP_LJ_Ent_ M607-CF237A/HP-LAserJet-Enterprise-M607-CF237A.jpg By Mike Josiah and the Technical Staff at Uninet

    The M607 series Monochrome laser printers are based on a 55-75 ppm black (depending on the model) 1200 x 1200 Dpi engine, with a first page out (depending on the machine) in under 5.3 Seconds. The cartridges are an all in one type cartridge that consists of the toner supply, drum, and waste chamber.

    These machines have a new feature called HP Sure Start. Each printer now regularly checks its operating code and repairs itself from attempted hacks.

    The printers based on the M607 engine are the:

    HP LaserJet Enterprise M607n
    HP LaserJet Enterprise M607dn
    HP LaserJet Enterprise M608n
    HP LaserJet Enterprise M608dn
    HP LaserJet Enterprise M608x
    HP LaserJet Enterprise M609dh
    HP LaserJet Enterprise M609dn
    HP LaserJet Enterprise M609x

    HP LaserJet Enterprise MFP M631dn
    HP LaserJet Enterprise MFP M631h
    HP LaserJet Enterprise MFP M631z
    HP LaserJet Enterprise MFP M632h
    HP LaserJet Enterprise MFP M632z
    HP LaserJet Enterprise MFP M633fh
    HP LaserJet Enterprise MFP M633z



    The cartridges used in the M607 engine are the:

    CF237A 37A 11,000 pages $189.00 List*
    CF237X (HY) 37X 25,000 pages $292.99 List*
    CF237Y (EHY) 637Y 41,000 pages $399.00 List*

    * Pricing current as of August 2017.

    Figures A and B show the CF237X and CF237Y cartridges.

    Figure A
    Figure A



    Figure B
    Figure B



    Required Tools

    1) Toner approved vacuum.
    2) A small screw driver (Common Style)
    3) A Phillips head screwdriver
    4) Needle Nose Pliers
    5) Spring hook
    6) Modified sprint hook/Dental probe (See Text)
    7) Dremel type rotary tool

    Supplies Required

    Toner for use in the HP M607 series
    New replacement chip. Make sure you have the correct yield!
    New Long Life Drum
    New Wiper Blade
    Drum Cover
    Lint free Cloths
    Conductive grease
    Isopropyl alcohol
    Cotton Swabs


    1) Remove the springs from both sides of the cartridge. Note that there is a darker colored spring on the gear side of the cartridge. See Figures 1 & 2

    Figure 2
    Figure 2



    Figure 3
    Figure 3



    2) Drill a small hole in the top of each side of the cartridge as shown. This hole will enable you to remove the pins. See Figures 3,4,5 & 6

    Figure 3
    Figure 3



    Figure 4
    Figure 4



    Figure 5
    Figure 5



    Figure 6
    Figure 6



    3) With the modified Spring hook/dental probe, insert the bent side into the hole you drilled and push the pins out from each side. You may need a small pin punch and hammer to knock them out. See Figures 7 & 8.

    Figure 7
    Figure 7



    Figure 8
    Figure 8



    4) Lift the two halves apart. See Figure 9

    Figure 9
    Figure 9



    5) On the waste chamber, remove the screw from the drum axle end cap. Cut the plastic as shown and remove the end cap. The end cap is welded in this one spot. See Figures 10, 11, 12 & 13

    Figure 10
    Figure 10



    Figure 11
    Figure 11



    Figure 12
    Figure 12



    Figure 13
    Figure 13



    6) Remove the drum and bearing. See Figures 14 & 15

    Figure 14
    Figure 14



    Figure 15
    Figure 15



    7) Remove the PCR. Note the conductive grease on the one side. See Figure 16 & 17

    Figure 16
    Figure 16



    Figure 17
    Figure 17



    8) Carefully pry up the erase lamp assembly. Itís held on with double sided tape. See Figure 18

    Figure 18
    Figure 18



    9) Remove the two screws from the wiper blade. Remove the Wiper blade. See Figure 19

    Figure 19
    Figure 19



    10) Clean out all the waste toner from the chamber.

    11) Clean the felt seals on each end of the wiper blade. Make sure the waste auger turns freely. See Figure 20

    Figure 20
    Figure 20



    12) Remove the two screws from the right (gear) side of the waste chamber. Pry up the auger cover and clean out any remaining toner from the auger system. See Figures 21 & 22

    Figure 21
    Figure 21



    Figure 22
    Figure 22



    13) Snap the auger cover back in place and install the two screws. Make sure the auger system turns freely by turning the drive gear. See Figures 23 & 24

    Figure 23
    Figure 23



    Figure 24
    Figure 24



    14) Melt a hole with the specialized soldering iron in the waste chamber and remove all the waste toner from the hopper. Place a good sealing label over the hole. See Figures 25 & 26

    Figure 25
    Figure 25



    Figure 26
    Figure 26



    15) Install a new or cleaned, lubricated wiper blade and 2 screws. See Figure 27

    Figure 27
    Figure 27



    16) Install the erase lamp assembly. See Figure 28

    Figure 28
    Figure 28



    17) Clean the PCR with your preferred cleaner and install in the cartridge. If the conductive grease is contaminated with toner, replace it with new. See Figure 29

    Figure 29
    Figure 29



    18) Clean and replace the conductive grease on the drum axle. See Figure 30

    Figure 30
    Figure 30



    19) Install the drum. Note the drum bushing lines up with tabs. See Figures 31 & 32

    Figure 31
    Figure 31



    Figure 32
    Figure 32



    20) Install the end cap and screw. Use a small amount of a good silicone adhesive to glue the cut part together. See Figures 33 & 34

    Figure 33
    Figure 33



    Figure 34
    Figure 34



    21) Place the waste chamber aside.

    22) On the supply chamber, remove the three screws from the non-gear side end cap. See Figure 35

    Figure 35
    Figure 35



    23) Remove end cap. See Figure 36

    Figure 36
    Figure 36



    24) On the gear side, remove the 3 screws. See Figure 37

    Figure 37
    Figure 37



    25) Press in on the two bottom tabs and pry off the end cap. Note that the gears will stay on the end cap. See Figures 38, 39 & 40

    Figure 38
    Figure 38



    Figure 39
    Figure 39



    Figure 40
    Figure 40



    26) Remove the drive gear from the magnetic roller. See Figure 41

    Figure 41
    Figure 41



    27) Remove the developer roller. See Figure 42

    Figure 42
    Figure 42



    28) Remove the two screws from the doctor blade. Both screws have normal right hand threads. Pry the blade up make sure the sticky seal stays on the cartridge. See Figure 43

    Figure 43
    Figure 43



    NOTE: These cartridges have a self-removing seal that is not accessible from the outside of the hopper. To install a seal it looks like the hopper will have to be split. Testing is ongoing for this possibility.

    29) Fill with the correct load of toner for use in the M607 series. See Figure 44

    Figure 44
    Figure 44



    30) Install the doctor blade and two screws. Make sure the sticky seal under the blade seal correctly. If the material is no longer sticky clean it with alcohol or replace it with a small amount of silicon. See Figure 45

    Figure 45
    Figure 45



    31) Install the cleaned magnetic roller assembly. Make sure the black bearing is on the gear side. See Figures 46 & 47

    Figure 46
    Figure 46



    Figure 47
    Figure 47



    32) Install the white bearing on the mag roller, the non-gear end cap and three screws. See Figure 48

    Figure 48
    Figure 48



    33) Install the magnetic roller drive gear. See Figure 49

    Figure 49
    Figure 49



    34) Install the gear end cap and three screws. You might have to turn the mag roller shaft slightly for the end cap to fit properly the end is keyed and fits into a keyed slot in the end cap. See Figures 50 & 51

    Figure 50
    Figure 50



    Figure 51
    Figure 51



    35) Place the two halves together. See Figure 52

    Figure 52
    Figure 52



    36) Install the two pins. See Figures 53 & 54

    Figure 53
    Figure 53



    Figure 54
    Figure 54



    37) Install the two springs. Make sure the darker colored spring is on the gear side. See Figures 55 & 56

    Figure 55
    Figure 55



    Figure 56
    Figure 56



    38) On the supply chamber, remove the chip by prying the locking tab back slightly. See Figure 57

    Figure 57
    Figure 57



    39) Remove and replace the chip. Make sure you have the correct yield chip for the cartridge! See Figure 58

    Figure 58
    Figure 58



    40) Install the drum cover. See Figure 59

    Figure 59
    Figure 59

    Comments 1 Comment
    1. service's Avatar
      service -
      Dear Mike Josiah,

      Congratulations on your detailed description!
      Please help me where I can buy or order the New Long Life Drum and
      New wiper blade.

      Thank you in advance for your help

      Best Regards,

      Service
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