Question about John Deere 50 60 70 520 620 720 Power Steering Plate
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Posted on Jan 02, 2017
Can you hear the pump run when you turn the switch on? If so, you have installed the pump correctly.
There could be an air lock...... there should be a handle somewhere for a manual pump you can loosen a fuel line connection and pump until the bubbles stop and all fuel comes out.
Posted on Feb 21, 2009
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).
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Posted on Apr 19, 2009
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