Laserjet iiip, paper skews when entering printer

[diogenes10]

HP laserjet iiip. Was giving a paper jam error.
Ordered pickup roller and separation pad repair kit.

After I installed these parts, printer pulled paper to the left as it entered the printer.

Sellers' advice was to check the pickup rollers to see if they were the same size. ????
No idea how I might do that. I finally decided to try taking the new rubber pickup roller sleeves off the new rollers and putting them on my old HP plastic rollers. They were hard to work with and I tore one in half in the process.

So I was back to my old rubber sleeves. I took the new plastic rollers and exchanged the position they were in, moved left one to right and right to left. Then I put my old sleeves on the new rollers, replaced the bar and used the new separation pad. The paper skewed left worse, creating a bow of 1/32 to 1/16 of an inch in the paper as it pressed up against the left side of the paper tray.

So I took it apart again and put the old rubber sleeves back on the old HP plastic rollers. I rotated the worn, shiny, smooth portion of the rubber sleeve 1/3 of the way around the roller from where it was before. I reassembled and also used the old separation pad. Now there is a slight skew to the right side - enough to notice if you look at the top margin of the printed test page.

The change in skew side from left with the new parts to right with the old ones seems to me to show the new parts were bad - even though the seller has had no other complaints. I have asked my ebay seller for new parts -rollers at my cost since I tore one and separation pad at his expense. Don't know yet if I will get them.

Are there any adjustments in addition to replacing or moving around the parts that would control the paper skew?

Thanks.
D

 

[edfair]

You could try using trimite (400 grit carborundum paper) on the rolls to remove some glaze. But this will be a temporary patch at best.
Other than the separation plate being warped you have done what is needed.

Ed Fair
Give the wrong symptoms, get the wrong solutions.

 

[gremlin11]

If your printer is skewing the page as it enters the mp tray and seeming to then jam at or about the toner cartridge, your problem is not rollers or pads. The main drive clutch inside the cover on the right hand side of the unit has failed. This is a common problem with these old units and will require replacement of the drive clutch assembly. As this unit is now very old, parts for this unit are generally hard to come by and you may struggle.
Good luck