That the belt only lasts just over one year and is likely to disintegrate right after your warranty expires. You will first notice little black pieces appearing on your prints, which is the belt falling apart little by little.
More like 4.5 years in my case.
You can attempt to replace the belt, but you will need approximately 8 to 12 hours and take the risk of breaking something else in the process.
I did use about 8 hours to clean many parts and replace the belt, first time experience. An experienced serviceman should do that in 4 hours. DIY work goes along with taking risks.
My first belt "EXPIRED" one week after my warranty did. My business was down for two weeks while I found the belt and did the repair. Luckily everything went well.....for another year, and now the belt is disintegrating again. My friend also has the machine and exactly the same thing happened to his belt.
Strange, so when I count all you bought a Z3100 two years ago. A new one? That model was replaced by the Z3200 in the winter of 2008/9. If you bought it in the winter of 2010/11 you probably got a machine that was stuck in the pipeline for 2 years. That would explain the 4 years degrading of the first belt, they go used or not used. I would have bought a Z3200 at that time. When the belt is replaced it is a good thing to clean thoroughly the wheel that drives it so the tooth fit correctly in the belt. In regular maintenance clean + oil the bar well where the carriage runs on so not much strain is applied to the belt. I also cleaned and lubricated the knife and did the same with the profile it runs in, putting teflon fluid (with a cloth) on the profile parts that should guide the knife and keep the parts clean and dry that give the friction on the wheels so the rotary cutter knives rotate. A lot of tension is created on the belt if the wheels do not rotate while cutting paper.
Whether the two belts I replaced will last I do not know. Done it not so long ago and I ordered alternative replacement belts from a HongKong source, not the genuine HP ones.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012, 500+ inkjet media white spectral plots.