Checking Depth Control for Leakage-Machine With Single Point Depth Control

causym CAUTION: Escaping fluid under pressure can penetrate skin causing serious injury to you or others. Avoid hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected into skin must be surgically removed within a few hours or gangrene can result. Doctors unfamiliar with this type of injury can call Deere & Company Medical Department in Moline, Illinois, or other knowledgeable medical source.

causym CAUTION: To avoid injury or death to you or others, stand clear of machine when wings are being bled. Mechanical or hydraulic failure can allow wings to fall rapidly.

causym CAUTION: Be certain cylinder and attaching hoses are fully charged with oil before bleeding system. Failure to do so will allow wings to fall rapidly when attempting to lower from folded position.

1. With wings unfolded, check all hoses, hydraulic fittings, and cylinder rod seals for external leaks. Repair all external leaks before continuing procedure.

2. Move actuator arm on Single Point Depth Control back so valve is not activated during this procedure.

3. Cycle machine up and down 3 times.

4. Lower machine until shovels are approximately 101-203 mm (4-8 in.) above ground.

5. Shut off tractor engine.

X9811
N39547

OUO6061,0001DE5 -19-02MAY05-1/2

6. Locate and disconnect pressure line from SCV. This line goes to Single Point Depth Control valve and to base end of main frame cylinders. Leave return line (wing frame to tractor) as is.

causym CAUTION: Wings are heavy and can fall causing serious injury or death to you or others. Keep all individuals away from machine when placing SCV in FLOAT position.

7. Return to tractor cab. Lift SCV lever stop in tractor console and push SCV lever fully forward to FLOAT position.

8. Measure and record length of all depth control cylinder rods.

9. Let machine stand for an hour. After an hour, measure and record rod length for each cylinder as done in Step 8. Note if cylinder(s) extended or retracted.

10. If any depth control cylinders have extended or retracted more than 10 mm (3/8 in.), match your results in table. (See ANALYZING TEST RESULTS-SERIES-PARALLEL SYSTEM in Service section in order to locate leaking cylinder(s).)

OUO6061,0001DE5 -19-02MAY05-2/2