Help, please: Gravermeister/915 handpiece running HOT(SOLVED)

[Imageraj]

I see, I keep the oil level to the red line - perhaps I can wait till the wick is barely touching the oil and see if it sucks less oil. Thanks

 

[Aventuraal]

After following this thread, and pulling the left end casting off to check the vanes and oiling, I found that aiming a small fan at the left end and back side, where the oil filtering and muffler canisters are, that after running the 915 handpiece for 2 hours at various power levels and speeds, that the handpiece was slightly warm to the touch, but completely comfortable to use. Mine is located partially under a shelf and near the wall, so the air circulation is probably not optimal for for the convection cooling to work properly. Mine runs on Dexron ATF and the Hobbs meter I installed shows over 330 hours since I installed the meter. GOK how much time was on it before I bought it some 10 years ago.

 

[Imageraj]

After servicing the vanes mine has been running the 915 handpiece warm but not super hot as earlier. I am building a sound proof box with 2 muffin fans for intake/exhaust to see if it cuts down the sound and removes the nasty smell of dexron 3 ATF. I did notice little oil outside the left rotary vane housing on the bottom rim. Not sure why. Mine is on a wooden board on concrete floor with enough clearance around it for the air circulation. Will try the circulation fan tomorrow to see if it helps. Thanks

 

[Imageraj]

Build a sound deadening box for my Gravermeister. Using the NIOSH sound app on my iPhone - it appears that the box reduced the sound by half (about 10 dB - from 73 to 63 on the nonlinear dB scale) - hopefully it will also remove the stinky smell of ATF from my workspace. Every little things help!