Brother KH840 knitting machine is a standard-gauge machine with 200 needles, 4.5 mm apart, and punchcard reading capabilities for patterning. Read more about the pros and cons of this model in my Knitting Machine Encyclopedia. This post is dedicated to a specific Brother KH840 serviced and tested in my shop in November/December 2025.

Per my usual routine, I deep-cleaned the punchcard reader, the timing belt cams, and the carriage. I removed all needles, cleaned them, and inspected. First visually and then while knitting on the full bed to ensure all needles (even after they passed the visual inspection) form the correct stitches. See the video of these tests. I knitted tuck, slip/part, and two-color fair isle. All tests went great with no mispatterning.
In the video, I forgot to attach the row counter during my tests. But a new row counter (new stock) will be included with the setup. The lace carriage was not tested but all buttons and levers move freely. It is a simple carriage and does not need extensive testing.

I treated minor rust spots on the inside of the case cover with a protective coating and Rustoleum. The needlebed itself did not have any rust spots.
The machine will come with all major accessories and with only some minor accessories missing.

The lid has new plastic end caps. The old ones were cracked. Thus, you might see some color difference between the case end caps and the lid end caps. I also attached the lid end caps with brand new snap clips instead of old, yellowed ones.

Table clamps, row counter and claw weights are new (new stock).
The missing accessories are:
- Tapestry needle (any needle of your choice will work)
- Lubricating oil (use Hoppe’s oil available on Amazon)
- A hard copy of the manual will not be included, but it is available online for free.
- The cast-on combs are not original to the KH840 setup but I am including a two-part Brother cast comb with a clip for extension.
All 25 punchcards are included but they are not the original Brother KH840 cards but they are for the Brother punchcard machine. The lace card #25 was damaged, so I replaced it with a card from another set. Some cards match those in the manual, and some don’t.

Imperfections:
- The case has some very minor scratches (not shown)
- some mismatched discoloration because of the age-related yellowing and some parts being new(er).
- handle for the main carriage has some very minor scratches

After this thorough cleaning, the machine behaved really well despite some minor imperfections.



















































































































