Question about HP LaserJet 4000n Printer
I can't figure out how to unlock and pull off the old rollers. Help please.
Just to clarify, tray one is the flip-down "multi purpose" tray.
Tray 2 and 3 are the "drawers". I assume you removed the round rollers, called the sep rollers. One of them is in the tray, and the other one is in the machine, directly above the one in the tray when the tray is in the closed position. Hope you did not miss that one.
Try this....directly behind the roller (on the same metal shaft) in the trays (drawers) is a little barrell shaped gizmo called the torque limiter. It is grey and black.
Pull off your seperation roller (in the tray) then pull off this little torque limiter right behind it. Now replace the roller (without the torque limiter) only to the "detant" position, (dead center middle) you will feel a slight click. as the roller sets into its "locking" groove. Now the roller is where it was, but there is no torque limiter behind it.
Note that without the torque limiter, there is no "groaning" noise. I know exactly what you are talking about when you say "groaning".
Now try to test. Does it still fail to pick up paper? If it picks up OK, all you need is a little torque limiter. It will work without this torque limiter, but not for long, this is just a test.
Make SURE your paper is all the way to the front of the tray, that the block behind the paper is in the LETTTER SIZE position. If it is NOT all the way to the front and under the metal clips at the front left and right of the tray, you wont pick up any paper at all cause your rollers would just be spinning on air, no paper for them to pick up. This happen FREQUENTLY because the paper backing block in the rear of the tray moves if you slam the drawer shut with too much force.
OK. After you have done this, if you still cant pick up the paper, try this. Try to print something from one of the trays. Look in the BACK of the printer into the drawer cavity. WHen you print, you will see 4 "d" shaped rollers rotate and come into contact with the stacked paper. If you do not see these rotating, you need a paper feed assembly.
You cannot do that one unless you know how. But should not be expensive to fix, less than $100. Takes a pro 30 minutes.
Posted on Mar 14, 2009
Sorry, I forgot I posted this. I figured out how to get the rollers off and back on. The problem now is that I replaced the smaller rollers but it is still failing to pick up the paper. It worked well for about 3 days and is back to the same paper jam error, minus the groaning. Any ideas? These would be the intake rollers on trays 1 and 2.
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Cassette (Tray 2) paper pickup and feed rollers
To remove the paper pickup and feed rollers
1 Remove the cassette.
2 Locate the two rollers on the bottom of the paper pickup unit (above the cassette). The pickup
roller is the smaller roller, and the feed roller is the larger roller.
3 Pinch the tab on the end of the cassette pickup roller (callout 1), and pull the roller out.
4 Pinch the tab on the end of the cassette feed roller (callout 2), and pull the roller out.
Figure 6-24 Removing the cassette pickup and feed rollers
Note Always replace the cassette pickup roller and the cassette feed rollers at the same time. Also replace
the separation roller (located in the paper cassette) when replacing these rollers
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