original neotat and t-techs

hi everyone, I have a couple questions that I hope you all can help me answer.. I have 2 original neotats and my 3.5 is getting really warm after about 15 minutes or so at around 10.5 volts using t-techs. my 2.5 doesn't seem to get very warm at all. they have about 30 - 40 hrs on them so fairly new. my 3.5 seemed to get a little louder as well so I did take it apart and lube it up. I was just wondering if this is normal or if I may have to have it repaired. Thanks in advance for all your help!!! forgot to add that running without being loaded it gets warm as well just take about 20+ mins or so

No need to have the spring in if your using t-tech-
the rubberband in the needle cart acts as a stay p return spring-you are making it do double duty.
Also dont get lube in the spring lower pocket area it tends to cause problems.
Only use a little lube spread evenly on slide and its channels.
The fki oil Mixed with the lube works wonders in this machine to keep it smooth,quiet and running cooler.
This is what works for me!
Try it if you have more problems ray will help you on here or the facebook page.

thanks slicksteel i'll give that a try see if it helps