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Forum topic by itodobien posted 08-25-2017 03:46 PM 295 views 0 times favorited 11 replies Add to Favorites Watch
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itodobien

8 posts in 59 days


08-25-2017 03:46 PM

Topic tags/keywords: planer repair jpm-13 jet plane

I bought this JPM 13 used and it’s been working really well. The other day when I turned it on it was making a LOT more noise than in the past. It was unnerving. I’m pretty new to woodworking and this is my first planer. I read through some similar posts on this site (I’ve been a long time lurker, but just made an account) and they took their planer all the way down, cleaned and re-greased everything. I thought “Hey, I can do that.” I watched some YT vids, though none were or the same model, and got my cutter head out, pulled the first bearing and opened the gear box. That thing was gross. It’s completely packed with grease that must be as old as the machine itself. My question is: is the box supposed to be that packed with grease when I reassemble, and what type of grease should I used. The YT vids all show that the gear box is full of oil, so I’m a bit at a loss. Here are a couple pics of the gear box. Thanks in advance for any help with this! Also, any tips would be appreciated. I’m not mechanically inclined.

-- My dust collecor has more $$$ in materials than my projects...


11 replies so far

View Fred Hargis's profile

Fred Hargis

4649 posts in 2277 days


#1 posted 08-26-2017 11:02 AM

I’ve seen a couple that were taken apart and the gearbox opened, and none (including mine, a Delta) were packed with grease like that. They all used heavy gear box oil (like 90 weight). The thing about the oil is the gears are constantly bathed in it as it runs providing adequate lubrication. I’m hesitant to suggest you do that…at least until you hear from someone with the same model planer. But I’m pretty sure that’s what I would do.

-- Our village hasn't lost it's idiot, he was elected to congress.

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EricTwice

223 posts in 317 days


#2 posted 08-26-2017 11:58 AM

If no one has taken it apart before, I would assume that yes, it is supposed to be like that. when you put it back you should find the engineer’s specs and follow them. they will tell you what kind of grease to use and how much.

I like the idea of gear oil also. But If you change over to it, you will need to seal the box to keep it from leaking out and make a way to check and add oil as needed. (this may be the reason they didn’t do it at the factory)

I work with a Yates/American circa 1950. The gears are in the open air, behind a door, and require a squirt of grease every month or so. I cleaned them a couple of years back and they are in fine shape. They will outlast me, and the guy after, if they are kept lubricated.

-- nice recovery, They should pay extra for that mistake, Eric E.

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itodobien

8 posts in 59 days


#3 posted 08-26-2017 02:35 PM

I got it all back together and packed it with grease again but it’s still making that loud noise. I replaced both bearings and had them pressed in by a machine shop right out of the box. I’m sort of at a loss now. I like the idea of sealing the box, but don’t know how I would get the oil in? Would I drill my own drain plug? I like oil a lot better than grease and it’s a lot easier to deal with. I’ve been all over the web and there’s no videos of forums on the model and the problem. I might call Jet on Monday to see what they suggest (aside from taking it in).

-- My dust collecor has more $$$ in materials than my projects...

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EricTwice

223 posts in 317 days


#4 posted 08-26-2017 03:04 PM

are you talking a lot of noise running but not actually plaining anything, or are you talking noise when it is planing a board.

If you are getting noise, running but not plaining, take the covers off and hold a 2 foot stick carefully on the different areas of the plainer. once it is settled in safely, put your ear up to the stick. you should be able to find where the noise is coming from. (like we used to do with the engine of a car)

If the noise starts when the board is inserted, change/sharpen the blades. even new ones can be dull
(this would be so much easier if I was there, rather than guessing from my living room, sigh)

-- nice recovery, They should pay extra for that mistake, Eric E.

View MrUnix's profile

MrUnix

5812 posts in 1983 days


#5 posted 08-26-2017 03:08 PM

Your gearbox was actually not too bad… I had one where the grease had basically turned into a dried out waxy substance (similar to what you typically find in old bearings).

However, it took several decades to get to that condition! Cleaned out and re-greased, it should be good for another 10-20 years depending on use. As for your noise… you need to isolate where it is coming from. It could be from any number of things – I’m sure there are more than just two bearings in that machine for example. The chain drive and feed rollers could be another area. Jet may or may not be able to get you some suggestions, but don’t expect much given the age of the machine.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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itodobien

8 posts in 59 days


#6 posted 08-26-2017 03:41 PM

Thanks Eric, I’ll give that a shot. It’s noise when I’m not running anything through it. So it’s got to be from the cutter head or the motor/belt drive. I thought I had solved it, as both of those bearings were bad. Brad, that is a pretty intense gearbox. Did it take any damage? Thank you guys for taking the time to help me out.

If the noise starts when the board is inserted, change/sharpen the blades. even new ones can be dull (this would be so much easier if I was there, rather than guessing from my living room, sigh)


I’ll buy the beer if you wanna stop by.

-- My dust collecor has more $$$ in materials than my projects...

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MrUnix

5812 posts in 1983 days


#7 posted 08-26-2017 04:04 PM

Brad, that is a pretty intense gearbox. Did it take any damage?

No damage.. but I never ran it like that either… that was how it was when I purchased it.

So it’s got to be from the cutter head or the motor/belt drive.

You said you already changed the bearings for the cutter head (6202 and 6203 bearings… hope you didn’t pay more than about $6 for both!). But if they were bad, chances are the motor bearings are as well, or at least not too far behind. I’d also inspect the plain bearings (bushings) that the feed rollers ride in and give them a little lube. Ditto for the chain drive that powers them… there are quite a few places that could be making noise.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View builtinbkyn's profile

builtinbkyn

1830 posts in 724 days


#8 posted 08-26-2017 04:08 PM

I have a Jet 15 I picked up used and it’s starting to make the same noise. That will have to be a project down the road.

Want to add, mine seems to be noisy such as you described, when powering down. Runs well otherwise.

-- Bill, Yo!......in Brooklyn :)

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itodobien

8 posts in 59 days


#9 posted 08-26-2017 05:38 PM


Want to add, mine seems to be noisy such as you described, when powering down. Runs well otherwise.

Exactly this. I just pinpointed it to the pulley side when it’s getting up to speed and then powering down. It sounds like a playing card on the back of a kids bike would sound f it were at a much higher RPM. I replaced that bearing just yesterday. Looking at the belt from the motor up to the pulley, it’s not perfectly centered. Instead of a perfect isosceles triangle, it’s more perpendicular on the way down and leaning a little left on the way up. Looking at the housing, there’s not really a way to adjust this. I took this thing down to the nuts yesterday, and cleaned it from top to bottom and inspected everything (as best as a layman such as myself can reasonably do) and all i found were those bearings. I hear the noise when I remove the drive chains, so it’s between the motor, pulley and cutterhead. The sound is loudest where the cutterhead meets the pulley and bearing. I don’t really see any wobble, but at that speed, it wouldn’t have to me much. Kind of lost right now.

-- My dust collecor has more $$$ in materials than my projects...

View Fred Hargis's profile

Fred Hargis

4649 posts in 2277 days


#10 posted 08-26-2017 07:18 PM

On mine, the feed roller runs in bearing blocks, and once it got crapped up and made a noise as you described. I know you said with the drive chains off you still have the noise so it’s not likely the problem but if you get a chance you might want to check them (those bearing blocks, if that’s the way yours is made) anyway.

-- Our village hasn't lost it's idiot, he was elected to congress.

View itodobien's profile

itodobien

8 posts in 59 days


#11 posted 08-26-2017 08:30 PM



On mine, the feed roller runs in bearing blocks, and once it got crapped up and made a noise as you described. I know you said with the drive chains off you still have the noise so it s not likely the problem but if you get a chance you might want to check them (those bearing blocks, if that s the way yours is made) anyway.

- Fred Hargis

I’m just about certain it’s the belt/belt alignment at this point. There’s substantial vibration and the cutter head pulley dead center is not directly about the motor pulley, it’s off to the left (when facing the pulley) about 1/2 inch. The thing is, I don’t know that can be adjusted easily. The bracket for the motor doesn’t have any wiggle room, and there’s really no easy way to shift the cutter head to the right. Bill, you might want to check this out on yours, I bet it’s a similar issue. You might get lucky and just have to replace your belts.

-- My dust collecor has more $$$ in materials than my projects...

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