1968Commando 52 #1 Posted March 15 Hello, I am putting a new brake drum shaft seal in a transmission and cannot get the drum removed how do I go about this? The transmission is a 5053 uni drive Share this post Link to post Share on other sites
lynnmor 7,535 #2 Posted March 15 Start by repeatedly soaking it with penetrating oil. Others will chime in with their success with using a puller. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,205 #3 Posted March 15 Keep the keyway flooded with pent oil and light taps on the hub to drive it in farther may shock it enough to move the pent oil around. 1 Share this post Link to post Share on other sites
rmaynard 15,874 #4 Posted March 15 (edited) Usually when a brake shaft seal is leaking, the oil that seeps out will lubricate the shaft enough that the drum will slide off with ease. This is a dumb question, but did you remove the snap ring? It looks like you did, but with the dirt it's hard to see definitively. As others have said, use a good penetrating oil. Not WD40. That drum is pretty easy to get a gear puller behind it if need be. Edit: Pullers are available for free from Advanced Auto Parts and Auto Zone. Edited March 15 by rmaynard 2 Share this post Link to post Share on other sites
WHX?? 50,333 #5 Posted March 15 Clean shaft, penetrant & wooden wedges to drive it off. 2 1 1 Share this post Link to post Share on other sites
squonk 42,187 #6 Posted March 15 @rjg854 had the dickens of a time getting his brake drum off his Commando I think. Share this post Link to post Share on other sites
stevasaurus 23,012 #7 Posted March 15 This is probably to late to say, but I would take off the "C" clip and give a good cleaning to the end of the shaft. If I felt chipped metal on the shaft, I would lightly file those. Then I have used a 2' pry bar tapping and working it around while prying off the drum. That has always worked for me with no damage. If you really have a stuck one, try using a large 1/2" drive socket over the shaft and tap the drum toward the transmission (or a big punch) to break the drum loose. Once broke loose, a puller or the prybar should work. Share this post Link to post Share on other sites
rjg854 11,807 #8 Posted March 15 4 hours ago, squonk said: @rjg854 had the dickens of a time getting his brake drum off his Commando I think. Almost as bad as a hitch pin. Worked on it for a few days, a little here and a little there. Share this post Link to post Share on other sites
Achto 28,509 #9 Posted March 16 (edited) The last stubborn one that I had. Removed the snap ring, sprayed lube on it, beat my brains out using wedges and..... nothing. Final resolution - I drilled 2 holes in the brake drum, tapped them to 5/16-18 thread. Now that I had these holes, I used a puller to remove the brake drum. Not sure why there were no jack holes drilled in these to begin with?? Edited March 16 by Achto 2 8 Share this post Link to post Share on other sites
wallfish 17,343 #10 Posted March 16 I've done them like a flywheel. Wedge behind it and then hit the shaft. The thing is to get it loose as mentioned. then it can be worked back and forth until it comes off. Share this post Link to post Share on other sites
WHX?? 50,333 #11 Posted March 16 10 hours ago, Achto said: why there were no jack holes drilled in these to begin with?? The Ponds didn't figure 60 years later would be messing with them. 5 Share this post Link to post Share on other sites
1968Commando 52 #12 Posted March 16 (edited) Hello all, I have been spraying it with pb blaster and hitting it still having issues going to keep spraying it periodically during the week and then next weekend I will try and get it off hopefully I will keep yall updated I have gear pullers but I cannot get them under the drum as there is not enough space between the gear case and the drum to get the fingers in there. Edited March 16 by 1968Commando Share this post Link to post Share on other sites
1968Commando 52 #13 Posted March 16 On 3/15/2025 at 10:36 AM, rmaynard said: Usually when a brake shaft seal is leaking, the oil that seeps out will lubricate the shaft enough that the drum will slide off with ease. This is a dumb question, but did you remove the snap ring? It looks like you did, but with the dirt it's hard to see definitively. As others have said, use a good penetrating oil. Not WD40. That drum is pretty easy to get a gear puller behind it if need be. Edit: Pullers are available for free from Advanced Auto Parts and Auto Zone. Yes the snap ring is removed 1 Share this post Link to post Share on other sites
oliver2-44 10,201 #14 Posted March 18 On 3/16/2025 at 11:52 AM, 1968Commando said: I have gear pullers but I cannot get them under the drum as there is not enough space between the gear case and the drum to get the fingers in there. This is where the wedges work. Cut some from hardwood like oak if you don’t have any brass or steel ones. Share this post Link to post Share on other sites
Jake Kuhn 1,579 #15 Posted March 18 I remove these using an air hammer with straight bit pressed against the shaft and holding slight pressure on the drum. Will vibrate off easily. Works well for drive pulley and some hubs as well. 4 1 Share this post Link to post Share on other sites
lynnmor 7,535 #16 Posted March 18 1 hour ago, Jake Kuhn said: I remove these using an air hammer with straight bit pressed against the shaft and holding slight pressure on the drum. Will vibrate off easily. Works well for drive pulley and some hubs as well. Not sure what that might do to the bearings. 1 1 1 Share this post Link to post Share on other sites
stevasaurus 23,012 #17 Posted March 18 @lynnmor has a good point there, about air hammering the brake shaft. I wouldn't worry about the bearing behind the drum, but the bearing on the back of the mushroom gear, on the other end, is a "cap" bearing and I would be careful there. I think the idea here is use short bursts with intermitent taps on the wedges...just to break the drum loose. Keep a close eye on that "cap" bearing. Share this post Link to post Share on other sites
