Removing the Pipe Support Assembly

Standard Operating Procedure

Removing the Pipe Support Assembly

Removing the Pipe Support Assembly

Removing the Pipe Support Arm

  1. 1.
    Park the machine on a dry level surface.
  2. 2.

    DANGER

    Electrocution Hazard

    Operating near or contacting a power line with any part of the machine can cause electrocution, causing death.

    1. Do not raise or lower the mast or operate the machine near electric power lines.

    2. Keep at least 3 meters (10 feet) away from power lines.

    3. If there appears any danger of wind or other obstruction decreasing the distance, do not drill in that area.

    Raise the mast to the vertical position and lock it in place.
  3. 3.
    Raise the rotary head to the top of the mast.
  4. 4.

    DANGER

    Electrocution Hazard

    Operating near or contacting a power line with any part of the machine can cause electrocution, causing death.

    1. Do not raise or lower the mast or operate the machine near electric power lines.

    2. Keep at least 3 meters (10 feet) away from power lines.

    3. If there appears any danger of wind or other obstruction decreasing the distance, do not drill in that area.

    Lower the mast to the horizontal position.
  5. 5.
    Put all of the controls in the OFF or neutral position.
  6. 6.
    Stop the machine.
  7. 7.
    Attach safety locks and tags to the machine in accordance with the site-specific procedures.

    NOTE

    Refer to Safety Locks and Tags Minimum Requirements in the Maintenance manual.

  8. 8.
    Make sure that the machine is in a zero-energy state.
  9. 9.
    Put blocks at the tracks, as applicable.
  10. 10.

    CAUTION

    Environmental Contaminant

    Oil is an environmental contaminant and must be discarded correctly.

    1. Do not let the used oil drain onto the ground.

    2. Discard the used oil in accordance with local environmental regulations.

    Put the containers in a position to collect the oil that drains from the hoses.
  11. 11.

    WARNING

    High Pressure

    Can cause severe injury or death.

    1. Release all of the pressure from the system before you remove any plugs or open the drain valve.

    Open the manual ball valve at the hydraulic tank to release the pressure from the system.

    NOTE

    The pressure gauge must read zero bar (zero psig).

  12. 12.
    Close the manual ball valve.
  13. 13.

    WARNING

    High Pressure

    Residual pressure can cause personal injury.

    1. Loosen the fittings carefully to release the pressure fully before you disconnect and cap the hoses.

    Clean, label, and disconnect the hydraulic hoses from the pipe support swing cylinder and the pipe guide clamp cylinder. Plug the hoses and cap the ports immediately.
  14. 14.
    Remove the three proximity switches (Figure 1, item B) and the associated cables (item A) from the pivot mount and the pipe support.
    Figure 1

    A

    Cables

    B

    Proximity switches

  15. 15.
    Disconnect the grease inlet hose (Figure 2, item A) from the grease applicator bank.
    Figure 2

    A

    Grease inlet hose

  16. 16.

    WARNING

    Gravity

    Stored energy can cause serious injury.

    1. Support the weight of the pipe support arm before you disconnect the cylinder hosing.

    Remove the split pin (Figure 3, item A) and pipe support arm swing cylinder pin (barrel end pin) (item B). Discard the pins.
    Figure 3

    A

    Split pin

    B

    Swing cylinder pin

  17. 17.

    WARNING

    Equipment Interference Hazard

    Can cause severe injury or property damage.

    1. Make sure that no overhanging power lines or any other obstructions are present that can interfere with the use of a boom truck crane or mobile crane.

    WARNING

    Crushing Hazard

    Can cause personal injury.

    1. Lifting equipment must be adequately sized, have the correct lifting capacity, and be in good condition.

    2. Be careful when you lift heavy components.

    Attach the pipe support arm (Figure 4, item A) to the crane with an approved lifting device.
    Figure 4

    A

    Pipe support arm

    NOTE

    The lifting points in Figure 4 are only an example. The lifting points may change if the cylinders and pipe guides are installed or not installed.

  18. 18.
    Disconnect the grease hose (Figure 5, item A) at the pipe support arm pivot pin.
    Figure 5

    A

    Grease hose

  19. 19.

    WARNING

    Gravity

    Stored energy can cause serious injury.

    1. Support the weight of the pipe support arm before you disconnect the pivot pin.

    Remove the split pin (Figure 6, item A) and slide the pivot pin out (item B). Discard the pins.
    Figure 6

    A

    Split pin

    B

    Pivot pin

  20. 20.

    WARNING

    Pinch Point Hazard

    Removing the Pipe Assembly from the mast can cause pinch point hazard.

    1. Be careful when removing the Pipe Assembly from the mast.

    2. Do not place any part of your body in the path of the Pipe Assembly while it is suspended by the crane.

    Lift the pipe support arm out of the mast carefully.
  21. 21.
    Store the pipe support arm in a safe location.

Removing the Pipe Support Pivot Bracket Weldment

  1. 1.
    Attach safety locks and tags to the machine in accordance with the site-specific procedures.

    NOTE

    Refer to Safety Locks and Tags Minimum Requirements in the Maintenance manual.

  2. 2.
    Make sure that the machine is in a zero-energy state.
  3. 3.

    WARNING

    Risk of Explosion

    Can cause personal injury or death.

    1. Before you weld, flame cut, or grind on the machine, clean the machine and the surrounding area from dust and other flammable substances with a nonflammable cleaner.

    2. Make sure that the premises are adequately ventilated.

    WARNING

    Risk of Personal Injury

    The electric arc includes visible, ultraviolet, and infrared light. Failure to follow these instructions can cause serious personal injury.

    1. Put on protective clothing and equipment during all welding operations.

    2. Use safety goggles to protect the eyes from heat, glare, and flying fragments of hot metals during all oxyacetylene welding and cutting processes.

    3. Use safety goggles and a hard hat that has an applicable filter glass to protect against the intense ultraviolet and infrared rays during all electric welding processes.

    4. When others are near the electric welding processes, the area must be screened to prevent the arc from being seen either directly or by reflection from glass or metal.

    WARNING

    Burn Risk

    Can cause personal injury.

    1. Make sure that a Hot Work Permit is completed.

    2. Obey all safety precautions regarding molten metal and open flame.

    Put fire protective blankets around the work area to protect the hydraulic hoses, electric cables, and feed cables from damage.
  4. 4.
    Mark around the pipe support pivot bracket with a punch. These marks are used to align the new assembly in a later step.

    NOTE

    Use electric arc air for gouging when possible so that the mast structure does not overheat. Be careful when gouging. Do not cut into or damage the main mast structure.

  5. 5.

    WARNING

    Energized Equipment

    Can damage the electrical system and cause personal injury.

    1. Disconnect the terminals from the battery when you work on the electrical system or when you weld on the machine.

    2. Disconnect the negative terminal first, then disconnect the positive terminal.

    Find the welds that must be removed (Figures 7 and 8).
    Figure 7

    A

    Weldment

    Figure 8
  6. 6.
    Gouge the pivot weldment from the pipe support. Do not remove the locating marks.
  7. 7.

    WARNING

    Cutting Hazard

    Can cause serious injury or damage to the surrounding environment

    1. Be careful when you use a cutting torch or grinding tools.

    Remove the paint, sludge, and carbon deposits with the grinder and the needle gun to make sure that new welds are not contaminated.