BO.....That is what we trying to figure out, if was it worth taking it out of a new machine? How does it split once you have all the boards, clutch packs, ect.. off of the sides of the machine?

The DR-150 comes off the right side. Remove the rt cover, about ten screws, the motor and wiring connections, then you should be there. Taking the assemble apart is easier than its removal. Reassemble is harder as is re-installation. If you're experimenting with swapping clutches, taking clutches apart, multiple reassembling, you can easily kill 2+ hours.

Now if you are referring to the reg roller I had the DR-150 out of the machine (I think you have to) when I replaced mine. I also had the guides, bypass and drawer primary PF assy out (left side cover off and a lot more prying.)

As I stated in my previous post the reg roll didn't fix my problem. Swapping and cleaning clutches didn't fix it either, though the jamming stopped and reg improved to only varying about an inch.

I've since had the pleasure of a second machine, this one's staying in the field. Again only fixed it enough to stop the jams. Don't overlook the sep roller and torque limiter, that was my rep's suggestion as well as Gazoo's

Haven't had this problem on a 1128, but I had it on a few printers.

If you take the cover off and watch the feed. There is a little solenoid with a plate. The plate sticks to the solenoid.

Had 2 or 3 printers with varying reg. problems, all cassettes and the MP tray. Cleaned off the plate, problem went away.

Worth a shot to take a look

looks like theres 2 opionons here. Reg Roller camp and Drive Unit camp. Whic of you guys is right? lol. Ive encountered the varying registration on 1128 just today.

Here's what we did and maybe will help others.
Quick Fix: Replaced the DR-150. But before we replaced it, we open up the Dr-150 and we found that the clutch in the middle has a worn out collar due to wear and tear. All the gears were good and if you can order the clutch separately, maybe will save some money. There are 3 clutches and only the middle one shows sign of heavy use. So, don't throw those used DR-150 yet. You might be able to repair them. This machine has 44k copies only and clutch (#2HN44110) not available yet.
After opening the right side of the machine, remove the drive motor, coupler gear ass'y and the Dr-150. It's not really hard to remove it, but my advice is just replace it and don't waste too much time troubleshooting it. I hope this helps.

Replacing the DR-150 fixed mine 2 months later.

Fixed a few KM 1820's by replacing the PF and Reg clutches and both their solenoids... On the KM 1820 the solenoids have a rubber spacer that the new solenoid does not come with it.Take and transfer those rubbers to the new solenoids... after a while they stick to the metal piece causing the sol/clutch not to engage in time .I believe they are similar FS 1128 MFP are similar to KM 1820.

Ok so the SOBs @ KMA said to me this DR-150 was defective just not a manufacturers defect. So they denied the warranty claim. I'm definitely getting jerked around by them.

Gotta agree with bebarcel about just replacing the DR-150. After adjusting the sep roller spring, the 1028 I worked on improved reg minimally so I replaced the Dr-150 and everything lined up and quit jamming.
I was curious about what could make these units crap out with such low mileage(that's kilometerage up here) so I took apart the defective one and that reg clutch was about the dirtiest mag clutch I've seen in a while. Full of brown crap and paper dust. Time for a clutch mod, Kyocera!!

Just be careful pulling the wires out of the clutch units. The red one in the back was so hard I pulled the wires out. I have also had offsetting and didn't see it on the drum so replaced the fuser after 45K but it was the drum blade.

replaced 5 or 6 dr-150s.it is the fix.p.s. not fun to replace

My observations: Had one varying reg & Jam20's going on. Reg problems from both cassette & Man feed. After replacing DR-150, jamming stopped along with reg problems from man feed, but cassette reg problems remain. I tried without the grey sep roller guide & that didn't make a difference. Also tried cleaning & oiling the wrap spring for the sep roller to no avail. I'm planning to grab another sep roller unit & take it back. I'll follow up later.

Are you guys still having trouble with the
DR-150 ? I have replaced many of them, and some of the new ones that I have replaced seem to be issue out of the box