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Cutterhead Gear Box Damaged Inside
Time Spent Repairing:
Entry Date:2014-02-03 16:16:24
0 of 1 customers found these instructions helpful
Cutter head gear box required replacement due to a bent main drive gear, cracked gearbox cover, and damaged sleeve bearings.
Instructions for removal of the cutter head gear box assembly and installation of a new assembly were not included with the ordered repair parts. Although I have the manual for the JPM-13 which includes an exploded view of the assembly, it does not clearly indicate how to removal/replace the gear box. To remove the assembly you must first remove the chain drives in front of the box. Next remove three hex bolts that suspend the gear box from the top of the right side of the planer and the four hex bolts that hold the gear box cover against the main assembly. Separate the front cover of the gear box to expose the internal gears. Remove the large gear in the upper left corner of the gear box (in front of the the cutter head shaft). Remove the (backward threaded) hex head gear shaft from the cutterhead shaft. Using a pry bar behind the gear box, work the box forward to remove it from the cutterhead shaft. Installation of the new gear box is a matter of simply pressing the new box back onto the cutterhead shaft, and reversing the removal procedure. Be sure to adequately lube the gear box assembly with a good grade of industrial grease.
Discussion for the Jet JPM-13 (708526) Planer / Molder
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Question: JPM 13 Planer
My JET JPM13 planer was in need of some serious gear replacements. Through Ereplacement link removed i was able to replace many of the worn/broken gears and bushings that were needed. However, some of the gears that they sent me are of a different size/pitch than the originals and therefore will not work within the gearbox of my particular planer. When ordering, i didn't see where there was any design changes to watch for while ordering these gears so I'm left wondering just what the problem is. My JPM13 planer is ser.# 5090261. The misfitting (and substantially larger gears in question are MHA-G05U and and the gear shaft that drive it, MHA-G19. So far, no one from Ereplacement link removed has been able to help me or explained to me what the problem is. My guess is a design change/upgrade that they don't know about. Or...someone could just be making them wrong. Anybody else out there come across this situation with this planer? I'm thinking I'll probably now have to go to a private machine shop to get this remedied.
Question: MHA-C Vs MHA-C01A
What is the difference between the hood assemblies MHA-c and MHA-01a besides the $30 price difference
Reply: MHA-C Vs MHA-C01A
I had to contact the manufacture to figure out what the difference is between the two. In short the one to go with is the MHA-C Dust Hood Assembly, because it comes with all the hardware to put it together. Whereas the part number MHA-C01A Dust Hood, does not. But it is $30.00 more. I have know idea why, and they couldn't tell me either.
Question: Leadscrew For Older Model Jpm-13
Morning, I've run into a snag with replacement of my leadscrew for my older model planer. The Part I need is Mha-bo6. The one offered in E parts Says it's compatible but It's a copmpletely different thread. It's a 9/16" (16) thread and is the only one offered for "handle side ( they do offer two different ones for the other side. I cannot find the true replacement which is standard thread nor have I been able to find a tap or any kind of heli-coil set to work. I'm already gray haired but this is really a job on it. any help would be really appreciated.
Reply: Leadscrew For Older Model Jpm-13
You have definitely found snag in your quest to repair your planer. In speaking with the manufacture the only way to remedy the problem ( If you can't locate a tap or heli-coil) is to replace both lead screws and the table with the newer part numbers, which are:
MHA-B04A Left Lead Screw.
MHA-B06A Right Lead Screw.
MHA-B02AW Middle Table.
With the parts costing around $220.00 and your labor, versus the cost of a new planer around $1000.00. You might just get some more gray hairs thinking about what to do.
Hope this helps,