Warn 8274 Brake Question Need Help

[Chris Wilcox]

My brake seems to have a lot of travel (axially and if I look down into it at the friction rings I can see that the bearings tend to fall down and collect in the lower portion of the space. The gap is wide enough that the bearings no longer run inline in a ring but sort of zig zag around the space. The top one falls over to the other side as I turn the ratchet ring by hand because the rest are a bit bunched up at the bottom. The brake does seem to behave properly on the bench and the bearings do come inline as the cam closes the brake.

I measured the axial travel of the ratchet by pushing it against the inner brake disk and zeroing the digital caliper, then pushing it against the outer brake disk and reading the difference. Mine travels 0.106". Could someone please measure theirs and post the number, it would be very much appreciated. Maybe I'm being paranoid (just bought it and rebuilt it with fill drain plugs, screws to hold the retaining ring on so I don't pop the brake off during winching, plus added some grease zerks)
Chris

EDIT: Looking at the parts diagram, I seem to be missing the item 50, P/N 37472, Spring, Disc Belleville. The disc spring goes under the retaining ring and would reduce the clearance of the assembly, however I've never seen it installed on a winch in all the searching I have done on the web. Any ideas?

 

[fj404life]

I looked for a diagram to see if I could figure out what you were talking about...found one. I still am not sure whats up though.
Found a good download-able parts diagram and a service manual while I was looking.

http://www.dojodesign.com/toyota/warn/M8274_RPL_Old.pdf
http://www.dojodesign.com/toyota/warn/M8274_Service_Manual.pdf

 

[Chris Wilcox]

Item 40 wiggles side to side. How much does it move? That is the what I am trying to say, it is a bit lengthy above.
Chris

 

[fj404life]

Just checked mine...its tight. I can spin it by hand but not wiggle it side to side. The whole shaft has some play in it. No way I could see down inside to the bearings. Been a while since I rebuilt it so not much help...whats the # in the diagram I posted of the part your missing?

 

[Chris Wilcox]

Not shown on that diagram. A washer is shown between item 35 and 36 on the newer s/n's. Blackjack over on pirate wrote this:
"The pawl should have some slop to it when the brake is relaxed. To test for proper operation, hold the outer disk still while trying to rotate the inner disk back and forth. There should be about .75in of rotation total. Too little (less than .5in) means something in the brake is sticking, too much (over 1in) means something is worn or damaged."
I checked mine and it rotates about 1.4". If I place 50 though under the retaining ring it is right at 3/4" as he specifies. He seems well trusted with the 8274 so it looks like I have found my answer.
Thanks for looking at yours. I helps to know it is closer tolerance than mine.

 

[lulo]

I looked for a diagram to see if I could figure out what you were talking about...found one. I still am not sure whats up though.
Found a good download-able parts diagram and a service manual while I was looking.

http://www.dojodesign.com/toyota/warn/M8274_RPL_Old.pdf
http://www.dojodesign.com/toyota/warn/M8274_Service_Manual.pdf

Thanks mate!

 

[fj404life]

NP Lulo thought those links would be handy!

Chris...Looked at newer parts diagram. It definitely looks like that would tighten things up for you if yours is newer!