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

Joined
Oct 13, 2007
Messages
26
Location
East Central Florida
#22
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.
 
Joined
Sep 14, 2020
Messages
29
Thread starter #23
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
 
Joined
Sep 14, 2020
Messages
29
Thread starter #24
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!
 

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