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Posted on Jan 02, 2017
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
raise front loader....loosen hyd. line a little lower loader till all air is released and only fluid is coming out and retighten.....its like bleedig brakes on a car
Posted on Nov 17, 2009
CRUSHTEK IS NO LONGER IN BUSINESS...THIS SHOULD HELP:
for calls outside of the USA 001-775-356-9554
Ericson Industries Inc.
260 Freeport Blvd,
IF THIS HELPS MAYBE U COULD SPONSOR ME. I REALLY DESIRE A JOB IN AUSTRALIA.
Posted on Jan 14, 2010
On the right hand side of the axle on top is a cover with 2 slotted bolts holding it on. Pull this and you will see additional linkage, and a heavy cable which conrols the rockshaft. There should also be 2 valves under this cover. Pull the valves out, inspect for damage, clean them up real good and reinstall. If it continues to leak off at the rockshaft with hand pressure, Then readjust the linkages. NOTE: There are 7 adjustments to the linkage to get this to operate properly, each adjustment affects the sensitivity of the rockshaft and need to be done in sequence. Yours is a David Brown 990 tractor. Your Case dealership will have the manuals for the adjustment procedure. If after adjustment, it continues to leak off, you will need to pull the rockshaft cylinder inside the axle and have it rebuilt.
Posted on Jan 21, 2010
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