I have a 1969 john deere 1020 and the both brake pedals drops to
the floor when depressed. I inspected the lines and they seems o.k.
(no leak). The hydraulic fluid level is o.k too. As they explain in the
shop manuel I've let the engine rev at 2000 rpm with the clutch engaged
for two minutes but it didn't change anything. The problem happened
after the tractor has not been use for a long period (about 10 months) .
I suspect the arrival of hydraulic fluid in the master cylinders block !
Is it possible ?? Anything else ??
Thanks for your help.
SOURCE: IJohn Deere whinning noise
Is the device that lowers or raises the loader a hydraulic piston type device, or more of a hydrostatic type device? Whining noises are not uncommon with hydrostatic devices...
SOURCE: system creeps down even when tractor is operating.
There are 2 potential problems -
1. Leaking spool on the control valve - rebuild the vale.
2. Cylinder blow-by. Disassemble piston and replace the seals.
To test if its the cylinder - retract the cylinders all the way... remove the hoses on the blind end (non rod end) of each cylinder, and again pull the valve to the retract position.
If fluid continues to pour out of the cylinder - the piston seal is damaged, and the affected cylinder must be repaired.
To test if the valve spool is faulty - disconnect the a and b ports just after the valve. Turn on the system and check for seepage from the disconnected lines (without moving the lever).
Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.
SOURCE: John Deere 1020 Weak 3 point hydraulics
I would suggest you find a JD dealer and buy a manual if you want to do the maintenance yourself. You can also do a Google search and find manuals.
I would also suggest you completely drain the old hydraulic fluid and replace it with new fluid and a new filter if it has not been serviced any time in the recent past.
The symptoms you describe can be low fluid and/or a clogged filter. If you or anyone else has run the tractor too long and it has low fluids and/or a clogged filter, you can damage the hydraulic pump and that can get costly.
SOURCE: how to rebuild hydraulic pump on 4440 john deere
This is something that you need to have special tools to rebuild pump, your best bet is buy a rebuilt from a rebuilder manufacture.
SOURCE: Need wiring schematic diagram for JD L130 lawn
You should price a new wiring harness,around $80 so there is not much reason to spend a lot of time trying to find shorts or open wiring.
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Hello almarcoux:
>>Have you Loosened the Lines at the Brakes while Someone Pushes Lightly on the Pedals Until the Bottom Out and the Tighten the Fitting.
>>Are you Getting Fluid to the Brake Cylinder (Not Master Cylinder)?
>>You can View a Breakdown/IPL of the Engine and Mower at this Site Addy, http://jdpc.deere.com/jdpc/servlet/com.d... and Enter the Model Numbers and Click Find. Then Select your Model from the Search Results Area. Then Select the Sectional File. Then Select the Section of the Mower you Wish to View Online. *You can Drag the View Windows for Better Viewing.*
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.
Good Luck
Respectfully
jbridger (John)
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