Komatsu Bulldozers D85EX-15 : Every 250 Hours Service Maintenance

LUBRICATING

• Lower the work equipment to the ground, then stop the engine.

• Using a grease pump, pump in grease through the grease fittings shown by arrows.

• After greasing, wipe off any old grease that was pushed out.

Blade lift cylinder support yoke (4 places)

REMARK: These are at the front and rear of the left and right cylinders.

• Blade lift cylinder support shaft (2 places)

• Blade arm ball joint (4 places)

• Brace screw (2 places)

• Ripper lift cylinder bottom pin (2 places)

• Ripper lift cylinder rod end pin (2 places)

• Ripper arm pin (front) (6 places)

• Ripper arm pin (rear) (6 places)

ADJUSTING

• 1. Loosen bolts (1) and nuts (2), (4), and (5), then turn nut (4) and adjust the belt tension.

• 2. After adjusting, tighten bolts and nuts (2), (4), and (5), to secure alternator (3) in position.

• 3. Reinstall the cover removed in step 1. Confirm that no part of the cover touches any turning part of the alternator.

REMARK

• Check each pulley for damage, wear of the V-groove, and wear of the V-belt. In particular, be sure to check that the V-belt is not touching the bottom of the V-groove.

• If any pulley is defective, ask your Komatsu distributor to replace it.

• If any belt has stretched and there is no allowance for adjustment, or if there are cuts or cracks on any belt, replace both belts at the same time.

• When adjusting the V-belt, do not push the tension pulley directly with a steel bar, etc., but put a wood piece, etc. between the pulley and bar.

• After replacing the V-belt, operate for 1 hour, then check and adjust the belt tension again.

CHECK LEVEL OF BATTERY ELECTROLYTE: Carry out this check before operating the machine.

WARNING

• Do not use the battery if the battery electrolyte level is below the LOWER LEVEL line. This will accelerate deterioration of the inside of the battery and reduce the service life of the battery. In addition, it may also cause an explosion.

• The battery generates flammable gas and there is danger of explosion, so do not bring fire or sparks near the battery.

• Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with a large amount of water and consult a doctor.

• When adding distilled water to the battery, do not allow the battery electrolyte to go above the UPPER LEVEL line. If the electrolyte level is too high, it may leak and cause damage to the paint surface or corrode other parts.

NOTICE: When adding distilled water in cold weather, add it before starting operations in the morning to prevent the electrolyte from freezing.

Inspect the battery electrolyte level at least once a month and follow the basic safety procedures given below.

• Open battery cover at the left side of the machine.

If it is possible to check the electrolyte level from the side of the battery, check as follows.

• Use a wet cloth to clean the area around the electrolyte level lines and check that the electrolyte level is between the UPPER LEVEL (U.L.) and LOWER LEVEL (L.L.) lines. If the battery is wiped with a dry cloth, static electricity may cause a fire or explosion.

• If the electrolyte level is below the midway point between the U.L and L.L lines, remove cap (1) and add distilled water to the U.L line.

• After adding distilled water, tighten cap (1) securely.

REMARK: If distilled water is added to above the U.L. line, use a syringe to lower the level to the U.L. line. Neutralize the removed fluid with baking soda (sodium bicarbonate), then flush it away with a large amount of water or consult your Komatsu distributor or battery maker.

If it is impossible to check the electrolyte level from the side of the battery, or there is no display of the UPPER LEVEL line on the side of the battery, check as follows.

• Remove cap (1) at the top of the battery, look through the water filler port, and check the electrolyte surface. If the electrolyte does not reach the sleeve, add distilled water so that the level reaches the bottom of the sleeve (UPPER LEVEL line) without fail.

Use the diagram below for reference, and check if the electrolyte reaches the bottom of the sleeve.

• After adding distilled water, tighten cap (3) securely.

REMARK: If distilled water is added to above the bottom of the sleeve, use a syringe to lower the level to the bottom of the sleeve. Neutralize the removed fluid with baking soda (sodium bicarbonate), then flush it away with a large amount of water or consult your Komatsu distributor or battery maker.

If it is possible to use and indicator to check the electrolyte level, follow the instructions given.

WARNING: If the machine moves during the following operation, please contact your Komatsu distributor for repairs immediately.

NOTICE: Do not place the joystick in the 1st speed position. Otherwise, it will cause damage to the machine.

Before starting the engine, check that the area around the machine is safe, then do as follows.

• Start the engine.

• Start the engine, and after completing the warming-up operation, set fuel control dial (3) to the SLOW position.

• Set safety lever (1) to the FREE position then operate blade control lever (6) and ripper control lever (7) to raise the blade and ripper. Leave the safety lever (1) to the FREE position.

• Set parking lever (2) to the FREE position.

• Depress brake pedal (5), set joystick (4) in FORWARD, then press the shift up button to enter 2nd speed.

• Operate fuel control dial (3) and gradually raise the engine speed to full throttle. (Keep the brake pedal depressed.)

• Check that the machine does not move. This indicates that brake performance is normal.

CHECK OIL LEVEL IN DAMPER CASE, ADD OIL

• Open the engine side cover on the left side of the chassis.

• Remove dipstick (G) and wipe the oil off with a cloth.

• Insert dipstick (G) fully in the oil filler pipe, then take it out again.

• The oil should be between the H and L marks on dipstick (G). If the oil is below the L mark, add engine oil through the dipstick insertion port.

REMARK

• Check the oil level while the engine is stopped.

• If the machine is inclined, set it in a level position before checking the oil level.