IBM 1140 chirping noise coming from left side of print when documents print

The company I work for uses an IBM infoprint 1140.  I'm hearing a chirp noise while documents print from the left side of the printer.
I removed the left cover and I can hear the noise from under the plastic safety cover.  The first gear you can see is a shaft that is turned by
a series of gears behind the shaft.  Furthermore, I don't see any worn parts.  Any ideas on what can cause a chirping noise ?  ie. bearing, worn part, etc. ?

thx,

Steve K.
gendexitAsked:
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nobusConnect With a Mentor Commented:
>>  I even sprayed some lubricant   <<   normally not advicable, since dust and paper will catch up in it.
the sound can come from a bearing too.
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nobusCommented:
>>  I'm hearing a chirp noise while documents print from the left side of the printer.   <<   can be paper debris, or dust. give it a good maintenace call, vacuum it (remove toner) if possible, clean rollers with moistened cloth
 
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gendexitAuthor Commented:
The printer looks clean.  I removed the toner cartridge and side cover and see no signs of paper or a jam up.  I even sprayed some
lubricant to see if I can quiet the noise no luck.  The sound appears to becoming from one of the gears, but no wearing is present.  
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gendexitAuthor Commented:
I'm leaning toward a bearing issue.  The printer is a few years old so the manager in Customer Service wants to replace it.  The replacement
will be a IBM Infoprint 1572 that will run close to $4,000

QTY                MODEL                                                          DISCOUNTED PRICE

 

One                  InfoPrint 1572n (4538-n01)                                          $1,300
50 pages per minute, Ethernet 10/100, 640Mb memory standard, 600 sheet input standard (up to 4 additional drawers – 250, 400, 500 and 2,000 sheet drawers available), Max paper input is 4,100.  Standard output is 500 – Max output is 3,000 (up to 4 output options) Ships with 21K toner
Max monthly usage is 250K pages, 513MHZ processor, PPDS standard
 
One                  Duplex Option - 500 sheet                                            $   300
One                  500 Sheet Drawers                                                       $   275
One                  IPDS Option                                                                $   540
One                  64MB Additional Memory                                            $   400
One                  Hi-Cap Stacker                                                            $   575
One                  2,000 Sheet Hi-Cap Input                                            $   870
 
3-yr 5x9 ND on-site repair Service Pac for the 1572 is $525
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