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JLG | Compact Crawler Booms X14J - X390AJ - Rubber Track Maintenance

Use this checklist inspecting and maintaining the rubber tracks. Electric Motors that are not properly maintained will degrade over time and require premature replacement.
MaintainX
10/13/2022

JLG | Compact Crawler Booms X14J - X390AJ - Rubber Track Maintenance

Use this checklist inspecting and maintaining the rubber tracks. Electric Motors that are not properly maintained will degrade over time and require premature replacement.

    Checking track tension

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    Operations for loosening/tightening the track

    When gravel or mud are blocked between the toothed wheel and the track links, remove it before loosening.

    DANGER: IT IS NOT NORMAL IF THE TRACK REMAINS TAUGHT AFTER HAVING TURNED VALVE (1) IN AN ANTI-CLOCKWISE DIRECTION OR IF THE TRACK IS STILL LOOSE AFTER HAVING PUT GREASE INTO GREASER (2). NEVER TRY TO REMOVE THE TRACKS OR DISASSEMBLE THE TRACK-TENSIONER CYLINDER BECAUSE THE GREASE PRESSURE INSIDE THE TRACK IS VERY DANGEROUS.

      Checking The Rubber Tracks

      The structure of the rubber track is illustrated in Figure 3-3. The steel ropes and the metal core are sunk into the rubber. The carved profiles are used to give stability when moving over loose land. They are situated in the lower part resting on the ground, while the wheel guides situated inside the track, prevent the track from escaping from the guide rollers.

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        CAUSES OF DAMAGE

        1. Breakage of the steel ropes. Excessive tension causes the steel ropes to break in the following conditions:

        2. Wear and breakage of the metal cores. As for breakage of the steel ropes, stated above, excessive tension may cause the metal cores to bend or break, as may the following causes:

        3. Separation of the metal cores

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        4. Abrasion and fatigue cracks

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        5. Cracks due to external factors

        Replacing The Rubber Tracks

        DANGER: THE GREASE CONTAINED IN THE HYDRAULIC TRACK IS PRESSURISED. FOR THIS REASON, DO NOT LOOSEN THE GREASING VALVE (1) BY MORE THAN 1 TURN; IF THE VALVE IS LOOSENED TOO MUCH, IT RISKS BEING EXPELLED UNDER THE EFFECT OF THE PRESSURE OF THE GREASE, PUTTING THE SAFETY OF THE OPERATOR AT RISK. NEVER LOOSEN GREASER (2).

          When gravel or mud are blocked between the toothed wheel and the track links, remove it before loosening.

            Removing The Rubber Track

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            Installing The Rubber Track

            DANGER: ENSURE SAFE CONDITIONS WITH THE MACHINE LIFTED TO PROCEED WITH MOUNTING THE TRACKS

              Checking tightness of nuts and bolts

              UNDERCARRIGE COMPONENTS

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              Replacement roller lower wheel and tracks adjuster

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              Replacement wheel drive and Motor

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              CYLINDERS AND ENLARGEMENT GUIDE

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            Source: MaintainX (Community Member)

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