|Forum topic by wonderand||posted 07-27-2015 01:54 AM||737 views||0 times favorited||6 replies|
07-27-2015 01:54 AM
I’ve been reading LJ for a while, and really appreciate all of the advice you guys dole out on a regular basis. It’s been incredibly helpful as I get my small shop set up so thanks all. I looked through the threads but I didn’t see an answer to this question so I’m hoping someone can give me some advice.
The short version:
Can anyone recommend a grease to go in the gearbox? Dewalt used Shell Alvania EP 2 (since discontinued). Shell’s got a replacement (Gadus s2 v220) but it’s pretty expensive. Do you think I need an NLGI #1 or would white lithium suffice?
The long version:
I recently picked up a Dewalt 734 Planer on Craigslist for $50. That’s only a half brag and you’ll see why in a minute. The seller said that the cutterhead was binding on the posts and he couldn’t raise it or lower it. He didn’t want to take time to pull it apart and find out the problem so he put it up on CL for a cheap price. I checked it out, the motor sounded great with no issues and the feed rollers looked like they were in great shape. The side covers had been removed, but that didn’t bother me. The whole thing was filthy and there was some surface rust on the posts but nothing too bad. I ran it home as fast as possible. Thanks to previous posts, I knew it was likely rust binding to the carriage assembly so I broke everything down and started the long process of getting it cleaned up. I was able to knock the posts free with a deadblow mallet and a piece of hardwood and I used a scotch brite and wd40 to clean up the rust. I figured I’d give the whole machine a thorough going over since I already had it broken down. That’s when I noticed the switch cover was melted. It was subtle enough that I didn’t notice it when I was looking over the machine, but it clearly had been exposed to some high temps. When I looked under the carriage, the cutterhead and knives were totally covered with black soot. The motor seemed fine except for the labels on top, which after closer look had clearly warped from heat. The handle that raises and lowers the cutterhead had some subtle warping too. I’m guessing the seller removed the side covers because they were melted as well. After cleanup and rust removal the whole thing looks great, and I think it should be fine. The one thing that concerns me is when I opened up the gearbox, the grease inside was pretty stiff and the gears looked like they’d been blackened from heat. Here’s where we get to my questions:
Is it possible that the fire started in the gearbox? If so, how do I avoid that in the future? I cleaned out all of the grease inside. The gears turn freely and the bearings seem totally fine. However I do need to replace the grease. Does anyone know what grease I can use in there? Grainger has Mobilgrease CM-L that looks like it’ll work if I need an NLGI #1. Otherwise I have some white lithium grease on hand that I could use.
Lastly, are there any other safety checks I should be doing? There are no obvious signs of fire near the switch or the motor assembly, just the gearbox and outside. The gearbox was pretty packed full of grease and I’ve heard that fluid friction could cause it to heat up significantly but I don’t know if that could be the cause.
Thanks to anyone who chose to read that diatribe. I’m happy to send any pictures if needed.