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Komatsu Backhoe-Loader WB91-93/S/webm000404/wb91/93r-2: Every 250 Hours of Operation Maintenance

Use this maintenance checklist and follow the schedule interval for the proactive and preventive maintenance of your backhoe loader. This has been proven to lower costs by catching small service issues before they blossom into giant repair headaches.
MaintainX
11/04/2022

Komatsu Backhoe-Loader WB91-93/S/webm000404/wb91/93r-2: Every 250 Hours of Operation Maintenance

Use this maintenance checklist and follow the schedule interval for the proactive and preventive maintenance of your backhoe loader. This has been proven to lower costs by catching small service issues before they blossom into giant repair headaches.

    Carry out the following operations together with those to be performed every 50 HOURS:

    ADJUSTING THE FAN BELT TENSION

    The fan belt can be reached after opening the engine hood (See “3.5.1 ENGINE HOOD”).

    The control is manual: press the belt (1) with a thumb on the in- dicated pont with a force equal to approx. 10 kg; the resulting de- flection must be approximately 10÷15 mm.

    If the deflection exceeds this value, loosen the screw (2) that fas- tens the alternator (3) and, with a lever inserted between the en- gine block and casing, make the alternator slide.

    Lock the screw (2) again and check again.

    Use a 12 mm spanner.

    • Screenshot2021-07-22at11.00.08AM.png

    ADJUSTING THE A/C COMPRESSOR BELT TENSION (Only for machines with air conditioner)

    DANGER!

    • Screenshot2021-07-22at11.01.39AM.png

    The compressor belt can be reached after opening the engine hood (see “3.5.1 ENGINE HOOD”).

    The check is manual and consists in exerting pressure on the belt (1) with a thumb at the centre of the section between the compressor (2) and the pulley (3).

    If the pressure exerted is approx. 10 kg, the resulting deflection must be approx. 7-10 mm.

    When the belt is still new, the resulting deflection must be ap- prox. 4-6 mm.

    If the deflection exceeds these values, loosen the screw (4) that fastens the cam (5). Apply a tube on the end (6) of the cam (5) to restore the correct belt tension. Lock the cam (5) in this position with the screw (4).

    Use a 19 mm spanner.

    • Screenshot2021-07-22at11.02.58AM.png

    CHECKING THE BATTERY ELECTRO- LYTE LEVEL

    PERICOLO!

    • Screenshot2021-07-22at11.04.56AM.png
    • Screenshot2021-07-22at11.05.15AM.png

    IMPORTANT!

    CHECKING THE FRONT AXLE OIL LEVELS

    DIFFERENTIAL

    • Screenshot2021-07-22at11.06.54AM.png

    FINAL REDUCTION GEARS

    • Screenshot2021-07-22at11.07.29AM.png

    CHECKING THE REAR AXLE OIL LEVELS

    DIFFERENTIAL

    • Screenshot2021-07-22at11.08.19AM.png

    FINAL REDUCTION GEARS

    • Screenshot2021-07-22at11.08.52AM.png

    CHECKING THE HYDRAULIC TRANSMISSION OIL LEVEL

    DANGER!

    • Screenshot2021-07-22at11.10.12AM.png

    The dipstick (1) can be reached after opening the engine hood. See “3.5.1 ENGINE HOOD”.

    The oil level must be checked with the engine idling and the oil at running temperature.

    The oil must always reach the maximum level or be very near it.

    The oil must always reach the maximum level or be very near it.

    CHECKING THE WHEEL NUT DRIVING TORQUE

    • Screenshot2021-07-22at11.11.20AM.png

    IMPORTANT!

Source: MaintainX (Community Member)

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