Bush Hog 1812, Operator'S Manual

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MAINTENANCE
1812 08/14 Maintenance Section 5-15
©2014 Alamo Group Inc.
MAINTENANCE
Flex Wing Hydraulic Cylinder Replacement Instructions
Implement Cylinders Removal and Replacement
Follow these Steps:
1. Clear the area of all personnel before lowering the wings.
2. From the tractor seat with your seat belt fastened around you, Lower the implement wings to the
ground.
• Do Not attempt to replace the cylinder with the wings in the raised position.
3. Shut off the tractor, engage the parking brake, place the tractor transmission in the park position, and
remove the key before dismounting.
4. Block up the center and wing sections with blocks or jack stands
5. Release all oil pressure from the circuit by moving the valve controls handles back and forward.
6. Remove the Implement Input Driveline from the tractor PTO shaft.
7. Remove the hydraulic hoses from tractor quick disconnects.
8. Wear Safety Glass and impenetrable gloves when working with hydraulic hoses and fittings.
9. Check to see that the cylinder is not under pressure by moving the cylinder pins by hand. The pins
should be loose. If the cylinder pins are in a bind and can not be moved the cylinder may be under
pressure. Make sure the implement decks and axles are supported by blocks and then carefully
remove one of the cylinder pins.
• Do Not allow any one or any part of your body to be underneath the implement wing.
• Do not loosen the hydraulic connections to the cylinder until all pressure has been relieved.
10. Slowly loosen the hydraulic hose connection to the cylinder.
11. Remove the other cylinder pin and remove the cylinder. The cylinder maybe heavy, use proper lifting
techniques to lift and handle the cylinder and if needed get assistance in lifting from another person.
12. Measure the distance between the cylinder pin holes and extend the new cylinder to that length before
installing.
13. Install the new cylinder in place and install both cylinder pins and retaining clips in place.
14. Reconnect hydraulic hose(s) to the cylinder, and tighten the fittings.
• Wing cylinders have a special adapter with a small hole drilled in it to control the lowering speed on
the wing. Make sure this adaptor is installed. Without this adaptor, the wing can fall rapidly.
15. Reconnect the implement hoses to the tractor.
16. Get into the Tractor seat and fasten your seat belt. Clear the area of all persons before attempting to
raise the wing. From the tractor seat, start the tractor and operate the control valve to raise the wing.
17. Look for sign of oil leak. If an oil leak exists, shut the tractor down and remove all oil pressure in the
lines by moving the valve control handles back and forward.
• Re-tighten any lose fittings or connections.
• If a hose is leaking, replace the hose with a new hose.
18. If there are no leaks raise and lower the wing completely at least three full cycles to remove any air
trapped in the circuit.
19. Check the hydraulic reservoir of the tractor to ensure there is sufficient oil.
20. If the wing is to remain in the raised position attached the wing transport lock pins.