asked Jan 16, 2001 at 9:34pm
Hp HP LaserJet 4L

HP $L Repair

Looks like my 4L died. Part way through a print job I get a strange grinding (maybe clicking) sound, paper stops feeding, error light comes on. Take off the cover and look around a bit. There's a small gear that on the shaft of the feed motor and it looks like it may have worked its way off and isn't meshing properly with the other gears. With a small screw driver I managed to slide it back fully on the shaft but there's nothing that would keep it from sliding off again.

Any suggestions?

Replace the motor.
by moe on Jan 17, 2001 at 2:12pm Add comment

I pulled the motor and the gear appears to be in good shape just not attached to the shaft as firmly as it should be. I'm wondering if I could get away with a little epoxy? I have to imagine this printer is approaching the end of it's useful life (it's been in service since '94 or so) and I'm hesistant to invest too much in it.

Just so I know, how much is a new motor and do you carry them? If not, where can I get one?

Thanks for all your help!
by unknown on Jan 17, 2001 at 7:24pm Add comment
In my experience, the gear always cracks. It's a press fit on the shaft. If it isn't cracked a little epoxy might work. In any case, the motors aren't very expensive. They're around $25. A similar motor for an NEC is $150.
by moe on Jan 17, 2001 at 9:44pm Add comment

The gear doesn't appear to be cracked so I'm going to give the epoxy a shot. There's not much to loose but a little time. If it doesn't work, I'll give you guys a call and order up that motor.

Thanks for the help!
by unknown on Jan 18, 2001 at 6:36am Add comment

Upon closer examination, the gear is cracked. I'm still going to give the epoxy a shot but I have a sneaking suspicion I'll be ordering a new motor before long. My next question is since I have this printer ripped apart, is there any other maintenance I should be doing? Any other wear parts I should be thinking about replacing?

Thanks again!

by unknown on Jan 18, 2001 at 7:53am Add comment
I wouldn't bother with the epoxy. If the gear is cracked it won't stand up to that much stress. There isn't much you can do with it open. It's a very low maintenance printer. The only things that ever go bad are the motor and fuser. Every once in a while someone snaps the front sensor arm clearing a jam by pulling the paper backward.
by moe on Jan 18, 2001 at 6:01pm Add comment
Thanks again for your help, Moe. I'll give a call in the morning and order up that motor.

by unknown on Jan 18, 2001 at 6:07pm Add comment
HP 4ML when powering up, there is a loud gear type sound from the left side. tried two toner, and same sound. removed gear assy and everything looks solid. but noted the large gear that turns the drum gear can be moved by hand and skips, yet when gear train removed, it moves wthout incident. Motor? as posted above.thanks. we are in canada and your site has been helpful. unfortunately parts are more expensive ordering from the USA. (courier, customs surcharges)
by dad on Mar 7, 2001 at 6:51pm Add comment
That's usually a bad motor. The plastic gear on the shaft develops a crack and makes that noise. You have to replace the motor
by moe on Mar 8, 2001 at 12:09pm Add comment