after running thru some high grass and broken branches today i have no brakes.everything under looks ok but pedal just goes to the floor with no resistance.2 springs are attached they were fine before as usual.what am i missing here.
2800/3400 brakes
- Thread starter vulcan101
- Start date
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equipman
Gold Member
vulcan101
Follow the linkage back toward the rear end from under the platform and hopefully, you will find that some brush has pulled the cotter pins out and the linkage is disconnected from the actuating arm for the brakes. Hope this helps.
Lewis
Follow the linkage back toward the rear end from under the platform and hopefully, you will find that some brush has pulled the cotter pins out and the linkage is disconnected from the actuating arm for the brakes. Hope this helps.
Lewis
rk246
Gold Member
I imagine you already checked all your fluid levels?
When you say you have no brakes, is it both or only one side. If it is only the left side, it appears that there is a pin that connects the pedal to the shaft and linkage. Maybe worth a look to see if the pin is still there.
equipman
Gold Member
Can you move the actuator lever on the outside of the rear end and engage the brakes? Is the actuating lever slipping on the shaft running into the rear end?
ok, i have found that prior to losing brakes i had checked all fluids and all was ok, i rechecked today and could not see any in window by clutch pedal.i added two gallons and still nothing in window.will get a 5 gallon bucket and add tommorow and try again.i can see no apparent leaks but their must be one somewhere because the hydraulic fluid went somewhere.my owners manual doesn't list any brake fluid so im assuming brakes and lift all run off hydraulic fluid system.anyone else maybe ran over something and caused a fluid loss?what is the most common place for leak to occur?cannt see any apparent leaks under the tractor.hate to have to load up and haul all the way to dealer if its something i can do.
thanks again
vulcan
thanks again
vulcan
jrabb5
Member
I would make sure that you are seeing air in the window. the fluid in mine is a fairly clear and if you cant see a bubble in the top it looks like the window is empty. When I first got mine (L3400-gear), I looked at the window and thought it was empty, but was full with no air visible.
equipman
Gold Member
There is a piston with "o" rings that compresses the brake discs together and that could have gotten out of place. Were you running with the brakes on by any chance? When you check the fluid level, you must have all the hydraulics relaxed to get a correct reading. Hope we are giving you some help.
Lewis
Lewis
ccsial
Veteran Member
- Joined
- Jun 11, 2005
- Messages
- 1,678
- Location
- NorthWest Illinois
- Tractor
- (Kuboto L3400) (Ford 1900 4WD w/FEL) (Deere X748SE) All bought new
The brakes on the L2800/3400 are wet but not hydraulic activated. See the attachement of the brake system from the service manual.
If you brake pedal goes to the floor I would not think low hydraulic fluid level would cause that. I've never had one apart so I'm not sure but it does not appear that way.
My 3400 came with the fluid so full that the bubble in the sight glass was not there. I added fluid and no change in the window. I then drained it and saw the line in the window. If the glass looks just a bit yellow that is fluid. Pure white is no fluid.
Check your brake linkage for slippage.
If you brake pedal goes to the floor I would not think low hydraulic fluid level would cause that. I've never had one apart so I'm not sure but it does not appear that way.
My 3400 came with the fluid so full that the bubble in the sight glass was not there. I added fluid and no change in the window. I then drained it and saw the line in the window. If the glass looks just a bit yellow that is fluid. Pure white is no fluid.
Check your brake linkage for slippage.
Attachments
2 gallons of fluid, and nothing changed? It's a bit perplexing that your tractor would run if that depleted. Did you lower all implements (FEL, arms on 3ph) before looking for a bubble in the sight glass? Me, I see nothing in that glass when the FEL and 3ph are elevated, but everything zeros out fine in the "down" positions. I'd be REAL sure my system was depleted before adding any more fluid. When I got my first hydraulic fluid change, the sight glass looked empty - I called the dealer. Now, the fluid is a light tan.
daTeacha
Veteran Member
Let me preface this by saying I am totally unfamiliar with that tractor.
That aside, at least one poster says you have mechanically actuated wet brakes, not hydraulic ones, which is in agreement with my experience with tractor brakes on older machines. I have never had one with hydraulic brakes.
Operating on the presumption that your system is mechanical and based on your description of the conditions under which they quit operating, I'm pretty sure you caught something in the linkage and have a part jammed or disconnected somewhere. Get under the tractor and have someone else move the brake pedal. Watch the linkage to see if everything moves all the way back to where the linkage disappears. Look for stretched, bent, or disconnected parts. If everything appears normal, consider a trip to the dealer to do the same thing on a new tractor and look for any differences.
The worst case I can think of is that a branch snagged a part of the linkage and bent or broke something internal. I think it is most likely that it broke something external -- there is usually an intentionally weak link in a complex mechanical linkage, like a shear pin on an outboard to protect the engine when the prop hits a rock.
Good luck and let us know what you find.
Like I said, this is based on zero familiarity with your machine, but experience with assorted mechanical systems.
That aside, at least one poster says you have mechanically actuated wet brakes, not hydraulic ones, which is in agreement with my experience with tractor brakes on older machines. I have never had one with hydraulic brakes.
Operating on the presumption that your system is mechanical and based on your description of the conditions under which they quit operating, I'm pretty sure you caught something in the linkage and have a part jammed or disconnected somewhere. Get under the tractor and have someone else move the brake pedal. Watch the linkage to see if everything moves all the way back to where the linkage disappears. Look for stretched, bent, or disconnected parts. If everything appears normal, consider a trip to the dealer to do the same thing on a new tractor and look for any differences.
The worst case I can think of is that a branch snagged a part of the linkage and bent or broke something internal. I think it is most likely that it broke something external -- there is usually an intentionally weak link in a complex mechanical linkage, like a shear pin on an outboard to protect the engine when the prop hits a rock.
Good luck and let us know what you find.
Like I said, this is based on zero familiarity with your machine, but experience with assorted mechanical systems.
you are correct about the mechanically actuated wet brake system.thanks for the info.i went to the dealers today and looked under another l2800 and i found that i had bent the rear bracket that holds the adjusting rod and nut sideways.i bent it in such a way as it looked perfectly factory distance and appeared factory fresh.returned home pulled the bracket off straightened it out and presto new brakes again.
thanks to all you guys for the input and glad their is such a wealth of knowledge here for us newbys.oh and i did have to drain out the 2 gallons of fluid i had added as i did indeed overfilled because of the clear fliud.
thanks again
vulcan
thanks to all you guys for the input and glad their is such a wealth of knowledge here for us newbys.oh and i did have to drain out the 2 gallons of fluid i had added as i did indeed overfilled because of the clear fliud.
thanks again
vulcan
