Massey 2660HD rear brake issue

[JWR]

Ok no worries and do appreciate what your able to assist with. Also I don’t have a shop manual but plan to order one today. As I find out more I will keep you posted. I’m going to bleed it more this weekend so see if things improved first. Maybe I will get lucky. Thanks.

I assume you are bleeding both sides.

 

[sawtooth]

Yes sir. Going to try both again though just to confirm all air is out. Tried this twice so far but will give it another shot.

 

[JWR]

With the cross system connection still in place, I wonder if there is something odd one has to do to bleed the brakes (like some way to bleed that cross line along with the rest.)

 

[sawtooth]

Yeah that’s what I’m wondering to now. I’m for sure going to find out. Maybe we get lucky.

 

[sawtooth]

Well we spent the weekend working on the tractor. Looked underneath nothing is damaged or rubbing etc. Bleed both sides which didn’t seem to effect a thing. After going through everything best we we’ve determined or think is there maybe something internally clogging or interfering with the fluid. Reason being is that sometimes the right brake feels perfect but then all at once the pedal will only travel about .5-1” and during this time the right brake is always engaged no matter if the right pedal is depressed or not. I’ve decided to take it to my dealer to have the equalizer you mentioned disabled first. But if that doesn’t work then will probably have to go into the axle next. Will keep you posted.

 

[sawtooth]

Update:

Tractor has been at the dealer since Monday and so far no luck. They checked everything external, did the equalization defeat item as discussed without luck. Yesterday they tore into the right axle and again no issues found. Not sure how these brakes can be so complicated to diagnose and repair. Hopefully something turns up soon as all I hear now is a cash register totaling up as each hour passes.

 

[JWR]

Yes, really. With the brake pedal stopping and not going down as you described, that almost has to be master cylinder related (?) But how does that lock up the brakes on that wheel ? I was thinking the equalization might somehow cause that but that has been removed and checked off. This is getting to be a monumental puzzle. A rather large risk is that the dealer mechanics may not be able to see anything wrong and then just have to theorize what it MIGHT be...with no way to find out but put it all back together! That does get expensive in cut and try. All the more reason to engage the regional rep from AGCO. Not in the spirit of second-guessing the dealer people, but in the spirit of being a very good justification for getting another set of eyeballs on it, a person with far better access to nationwide reports, etc. Not that warrantee is involved, BUT depending on what the problem is AGCO might assist the dealer financially as well in something that unusual. [I became conversational with the regional AGCO rep in 2011 and it was mutually beneficial for me and the dealer. ]

 

[sawtooth]

So how do I contact them? I asked the dealer to reach out to them as they may have more info on this issue. Not sure if and when they will do it though.

 

[JWR]

I got a direct phone number from my dealer in WV who is no longer in business. That was for Randy Kocher of Newark Ohio. I talked to him just now and he is still with Massey. He says that Dave Sumner is probably the regional guy covering your area. Randy says that if your dealer is stumped or the both of you need support that the normal route is for the dealer to establish a "support case" with the central people out in Kansas and get on the schedule for the regional service rep to come look into it. A lot of Q&A would get done by phone before an actual visit of course. You may also be able to get the AGCO Answers people to get a case going for the problem.

A number for Massey was 678-534-3199 which, back then, forwarded me to "AGCO Answers." They have an email address which was agcoanswers@agcocorp.com

All that said it makes a big difference whether the dealer mechanics feel confident they have nailed the problem OR are not sure what it is.
Putting myself in your shoes, and knowing it is your nickels being burned, I'd watch for that indicator (they know or don't know) before it goes on much longer. If they aren't sure (esp. having had the rear axle apart!) you'd be "in the right" to ask them to have a talk with the regional service rep and to keep you in the loop discussing it. These regional service reps are in the business of dealing with the more difficult issues and are well paid to try and solve things. I've dealt with 3 (2 in Massey and 1 in Kubota) and all were reasonable and knowledgeable.

Interested to hear how it goes and what the problem was. Good luck of course.

 

[sawtooth]

Maybe check if the spring is still in place too. Number 50 on the diagram.View attachment 638977View attachment 638978

You maybe onto something here. Dealer just contacted AGCO rep and was told replace the actuator spring as it’s been improved. I’m thinking this maybe it. Reason being as the tractor gets ran some and starts warm up sometimes the right brake starts working properly. Could this be because the fluid becomes thinner due to heat thus allowing the spring is then be strong enough to release as needed? They have ordered the part and will install it once it arrives.