h16tp(x - AJ Maskin AS

Sheet C075CORRECTIVE MAINTENANCE SHEETCHANGING THE BOOM LIFTING CYLINDERFolio 1/2Caution!Ensure that the oil is not toohot.1 - Preliminary operations• Position the elevating platform on a firm, horizontal surface.• Put the turntable rotation blocking pin into place.• Lift the boom to enable access to the arm lifting cylinder fixtures (1).• Retract the telescope, lower the arm and put the jib in the low position.• Switch off electric power (see corresponding paragraph).• Put the boom into slings to take the weight of the boom while the cylinderis removed.2 - Removing the boom lifting cylinder• Put the boom lifting cylinder into slings.• Mark and disconnect the two hydraulic hoses on the boom lifting cylinder.NB:Unscrew the hoses slowly to release residual hydraulic pressure.• Fit caps to the hoses.• Remove the male clevis blocking the pin (3) of the boom lifting cylinder, onthe cylinder body side, by removing its fixing screw and washer, thenremove the pin (3).• Remove the male clevis blocking the pin (2) of the boom lifting cylinder, onthe cylinder rod side, by removing its fixing screw and washer, thenremove the pin (2).• Remove the boom lifting cylinder.3 - Installing the boom lifting cylinderNB:Lubricate all bores before re-installing the pins. Only use lubricantsrecommended by the manufacturer.• Put the boom lifting cylinder into place and fix the rod side to the boomsupport with the articulation pin.• Install the male clevis to block the cylinder pin and fix with its fixing screwequipped with a new grower washer.• Fix the boom lifting cylinder on the body side of the cylinder using the pin.• Install the male clevis to block the pin and fix with its fixing screw equippedwith a new grower washer.• Reconnect the 2 hydraulic hoses of the boom lifting cylinder.4 - Additional operations• Lower the boom.• Remove the sling from the boom.• Put the machine back into the operational configuration.• Make several boom lifting movements to check operation and purge thehydraulic circuit.• Check the level of the hydraulic circuit.