Brakes locking up GC2400

[boatboat]

Hey,
Got gc2400 and my brakes are locking up on light peddle.
Done 710hrs might try a fluid and filter change? can't hurt.
We do live in a hilly area and only use it on weekends.
I just can't see the brake pads being worn out?
Any help
thank you
Wayne

 

[cdaigle430]

Strange..these are wet brakes. I as well as several others have found the brakes somewhat lacking.

I didnt think this was even possible.

Maybe its a combination of linkage settings on the brake side and hydro petal side?

What hydraulic fluid are you using? Is it at the propper level?

Hopefully someone will have much better insight on this.

 

[Dmacleo]

spring involved check that
on pedal

View attachment 779508

 

[hube2]

I would look at the pedal and mechanisms mentioned by the previous posters first.



If that's not it then you could have disintegrated friction plates or a broken pressure plate and the parts could be getting wedged in places they should not be and this could cause the issue, but I suspect that this would be rare.

Pressure/friction plate damage would normally only happen if they overheated. It should be very hard to do this because you'd have to run it with the break engaged, or partially engaged and probably running on extremely low fluid. Normally, there isn't really anything other than moving the tractor with the break engaged that would cause this type of damage.

 

[boatboat]

I'll look at this arvo just been using multi Ag hydraulic oil.
I did awhile ago put some stop leak in it , but that was 6 months ago?
What oil should I use?
I'm in Australia pretty hot here.
Thanks

 

[boatboat]

Just checked it over and found nothing wrong but it is now only locking up in reverse on hard braking?
I think changing the oil is the answer

 

[DMW]

I find it strange that you would use the left brake pedal during normal operation. Normally it is only used to set the parking brake. If you are using it in conjunction with the right hydro pedals, you are creating a lot of resistance for the hydro, producing extra heat. If the tractor hydraulic fluid isn't of suitable quality it will quickly overheat, resulting in lots of issues as the oil thins out.
That being said, grease your linkages on the hydro pedals, ensure they move smoothly. Check linkages for brakes and hydro, ensure they are not bent or binding.
Stop Leak works by causing seals to swell. OK for a simple hydraulic system or manual transmission , maybe not the best for a hydrostatic drive.

 

[hube2]

I find it strange that you would use the left brake pedal during normal operation. Normally it is only used to set the parking brake. ...

That was pretty much my thought when I first read this. If my foot is off the HST pedals my tractor does not move, even on a hill. I use my break in 2 places on my property where I am driving up to the precipice of ditches and I only do that as a precaution and because I want to come to an immediate and full stop. Other than this I don't touch it unless I'm setting the parking break and getting off for some reason.

 

[WranglerX]

Odd that I find the "use of left pedal wrong", on my GC 1715 left pedal is "Brake Pedal" (by owners manual) and I use it as a brake..... True when off HST pedal tractor tends to slow and eventually stop, but using the brake pedal is more positive and probably intended to be that way....

 

[GeneV]

I find it strange that you would use the left brake pedal during normal operation. Normally it is only used to set the parking brake. If you are using it in conjunction with the right hydro pedals, you are creating a lot of resistance for the hydro, producing extra heat. If the tractor hydraulic fluid isn't of suitable quality it will quickly overheat, resulting in lots of issues as the oil thins out.
That being said, grease your linkages on the hydro pedals, ensure they move smoothly. Check linkages for brakes and hydro, ensure they are not bent or binding.
Stop Leak works by causing seals to swell. OK for a simple hydraulic system or manual transmission , maybe not the best for a hydrostatic drive.

I remember watching a youtube vid a while back, a [AFFILIATE=1, nofollow=true, newwindow=true, title="Kubota"]kubota[/AFFILIATE] bx channel guy, and he was constantly hitting the brake (even level ground) as he would easy of the hst pedal. Somebody even commented on that, and he kind of responded that it's a habit for him. I was thinking he outta break that habit.

Anyways, I would try Hube's way first, completely loosen the linkage, and then check to make sure the brakes don't work at all. If that's the case (hopefully), the linkage just needs to be adjusted.

 

[Dmacleo]

I find it strange that you would use the left brake pedal during normal operation. Normally it is only used to set the parking brake. If you are using it in conjunction with the right hydro pedals, you are creating a lot of resistance for the hydro, producing extra heat. If the tractor hydraulic fluid isn't of suitable quality it will quickly overheat, resulting in lots of issues as the oil thins out.
That being said, grease your linkages on the hydro pedals, ensure they move smoothly. Check linkages for brakes and hydro, ensure they are not bent or binding.
Stop Leak works by causing seals to swell. OK for a simple hydraulic system or manual transmission , maybe not the best for a hydrostatic drive

I use brake often when snow blowing few inches from a vehicle or house. also use it when hauling trailers around, letting off directional pedal going down hill with heavy trailer (as in like 38 bales of hay in a trailer on steep hill) ain't gonna stop you.

 

[boatboat]

Hey bought this today should be the same as OEM 20w 40.
I'll change it on the weekend all 11 litres .
Also I have backed off the brake adjusters.
While it up on jacks I will lube everything and see how it goes.
Thanks to everyone for your help and advise I really appreciate it .

 

[Dmacleo]

don't have info on hand right now, crap going on cannot dig into the gc2400 actual service manual, but there is a figure on spring coil gaps on the return spring on pedal to see if worn.
reason I mention this is cause a bad return spring often causes people to stupidly adjust rods and that drives a wet brake repair.
all for a 20$ spring.
been there done that.
750$ repair bill on a 2015 GC1710 (275 hrs on it then) in 2017. glad it wasn't my tractor, I just dealt with it all.

 

[hube2]

don't have info on hand right now, crap going on cannot dig into the gc2400 actual service manual, but there is a figure on spring coil gaps on the return spring on pedal to see if worn.
reason I mention this is cause a bad return spring often causes people to stupidly adjust rods and that drives a wet brake repair.
all for a 20$ spring.
been there done that.
750$ repair bill on a 2015 GC1710 (275 hrs on it then) in 2017. glad it wasn't my tractor, I just dealt with it all.

I can't find anything in my books (GC1725) about that spring. Would like to see if if you find the time.

 

[WranglerX]

For what it may be worth..... This is for GC 17XX series which seems to be about same as GC24xx series....

Not mention of spring in my manual other than brake parts diagram shows it does exist....

 

[Dmacleo]

For what it may be worth..... This is for GC 17XX series which seems to be about same as GC24xx series....


View attachment 779760

Not mention of spring in my manual other than brake parts diagram shows it does exist....

on 2400 correct free play on pedal is 20-30mm

cant find spring info, may have been dealer telling me what to look for. but if you can manipulate spring easily one handed...its worn

 

[boatboat]

Hey thanks for everyone's advise , I think I know why.
Did for Hyd oil change and filter and also pulled out the intake filter which broke while pulling it out, broke because the inner oring jamed it in.
Anyway was looking at my service book this arvo and is said the last hydr oil change was at 250hrs and now it has 724hrs. Maybe I didn't record the last change but everything is easy to use that tells me that old oil was worn out.
Hopefully after abit of driving around the brakes will be perfect.
Another question besides keeping the deck clean how can you stop it from rusting?
Someone must have a trick?