Originally Posted by rws70
How do you get that drop or two of oil into the original fan. When I peer into the gap between the fan blade and the fan square base, I see the copper windings and I am concerned about dropping some oil in through that narrow gap. Thanks!
Actually found a video on YouTube on how to oil the fan. Search for " ig33ku oil your PC fan " on YouTube. I will give that a try for fun and see if the old fan can be used longer.
All of those types of fans, as far as I know (and by those types, I mean the TiVo cooling fan, the one inside your PC power supply, case fans, and CPU heatsink mounted fans) are very similar in several respects.
There's a sort of a "cup" and the blades sprout out from it.
From inside the TiVo you can see the bottom of the cup, and air moves past it and the blades, past the top of the cup, and out the back of the TiVo.
You'll need to remove the screws holding the fan to the chassis.
(Unless it's an S1, then it just sort of snaps in place).
If you took the cup off, you'd see an axle sticking straight up from it on the inside. This axle goes into a bearing which is mounted in the center of some supports that connect to the fan's frame.
The wires will run down a channel in one of those supports until it reaches the circuit board with the coils and the bearing mounted in the middle.
At the place where the bearing mounts, on the other side of that, the side you had to take the fan out of the TiVo in order to get at, there will be a round sticker.
Under the sticker, there may be a plug in a hole, or maybe just the hole is there. Look into it and you can see the end of the axle that's not connected to the "cup".
There may or may not be some sort of "C-clip" or split washer which mates with a groove that goes around the axle's end. If there is, it has to be carefully removed to enable slipping the axle back out of the middle of the bearing, but removing the axle isn't absolutely necessary unless the old lubrication really needs to be cleaned out.
What I like to do is put a drop or 2 of light oil down into that hole so it flows down between the axle and the center of the bearing, then pack some light grease into the hole, pushing it with a finger to force some into the gap between axle and bearing, and then put another drop or 2 of oil in there.
And you can grab the bottom of the cup and work the axle in and out a little bit to help distribute the lubrication.
The grease helps thicken things up so all the oil doesn't drain away and the oil increases the grease's slipperiness.
Then you re-insert the plug, if there was one, wipe up extra lubrication with a paper towel or something, and stick the sticker back down.
You can get an idea of theory behind my combined lube technique by putting a little Vaseline on a surface and then a drop of baby oil on it and mix it up and rub it around with your finger, and you'll see how they combine to form something slippery that doesn't quickly dissipate due to the slipperiness.
But don't use those two things on the fan axle.
Try some fishing reel grease or go to an auto parts store for a little tube of dielectric tune up grease, and use 3-in-One oil, or sewing machine oil, or similar.