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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF65 brake sticks in reverse

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David Bloodwood

12-03-2006 13:59:47




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I"ve done 25 hours on my MF65 since fitting new brakes. THe RH brake is great, but LH brake "grabs" in reverse and then locks on. I have to go fwd a touch to free it. That side was worn to the rivets, and has scores on the braking surfaces at the rivet lines - would this cause it? The actuators were all fine - the ball paths a tiny bit worn but nothing major. Put the old balls back in.
thanks
David B

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NEsota

12-05-2006 07:41:11




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 Re: MF65 brake sticks in reverse in reply to David Bloodwood, 12-03-2006 13:59:47  
Aaron' Would like to know where to get Graphite Dry Lube. Brand name and so forth. Thank you.



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Aaron Ford

12-04-2006 16:48:01




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 Re: MF65 brake sticks in reverse in reply to David Bloodwood, 12-03-2006 13:59:47  
Hey Guys. I used graphite dry film on this due to exactly what you said. When I disassembled mine there was belly juice and brake crud filling the brake area. Had to be shovelled out with a scraper. Graphite Dry Lube goes on like spray paint and dries to a color similar to primer, just darker. Can says it works up to 850 degreess, dries rapidly, and has a coefficient of friction at .19. It is designed to be used on preassembly of moving parts.

The only "wet" lube was oil rubbed on the seal prior to reinstall.

Hope this clears things up.

Let's go Mountaineers

Aaron

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Aaron Ford

12-03-2006 16:16:04




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 Re: MF65 brake sticks in reverse in reply to David Bloodwood, 12-03-2006 13:59:47  
Can the adjustment be backed off some? Not sure if this would help. Kinda sounds like one of the brakes discs is sticking to the actuator plate. Did ya lube it? I used graphite dry film on the axles and actuators but haven't used them for more than pulling out of the garage.

Let's go Mountaineers, Aaron



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Aaron Ford

12-03-2006 16:18:18




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 Re: MF65 brake sticks in reverse in reply to Aaron Ford, 12-03-2006 16:16:04  
Oops, The way I wrote that makes it sound like I lubed the friction surfaces. I lubed the slides, linkages, and the ball grooves.

Aaron



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DavidP, South Wales

12-04-2006 01:06:12




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 Re: MF65 brake sticks in reverse in reply to Aaron Ford, 12-03-2006 16:18:18  
Hello Aaron,
The ball grooves should not be greased. You will get a buildup of dust collecting with the grease in the groove and then the ball has to push its way through this and may well have some difficulty in returning. We have had tractors where the slide lugs on the actuator and the lugs in the axle housing have been quite rough. These were smoothed off with an angle grinder. This has worked with them dry. Look for wear at the point where the actuators make contact with the axle housing. Are your discs 'as new'? Failing that a new actuator may be the only solution.
DavidP

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David Bloodwood

12-04-2006 13:16:02




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 Re: MF65 brake sticks in reverse in reply to DavidP, South Wales, 12-04-2006 01:06:12  
Thanks for yr responses, gentlemen. I didn't lube the actuators or axle splines because I was advised about potential grit build-up. My discs are brand new bonded ones. I noted a comment on this board abt removing a burr at the outer edge of the grooves on the disc faces of some brands of disc.

I note yr adivce, DavidP, re the locating lugs. I don't remember any roughness, and I took note because of my concern about the damage caused by the disc rivets. But I may have missed something. Sounds like I'll have to pull off that side and have a look at it... Hmm, biggish job.

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