Komatsu Bulldozer D39P-1

24.9.1 DRAIN, FLUSH AND REFILL COOLING SYSTEM

Soon after the engine has been stopped, the coolant is hot and can cause personal injury. Allow the engine cool before draining the coolant.

Never remove the radiator cap when the engine is at operating temperature. At operating temperature, the coolant is under pressure. Steam blowing up from the radiator could cause personal injury.

Allow the engine to cool until the radiator filler cap is cool enough to touch with your hands. Remove the filler cap slowly to relieve pressure.

Never be under the machine with the engine running. To avoid serious injury, always stop the engine before being under the machine to open the drain valve.

When removing drain plug, avoid pouring coolant on yourself. + Antifreeze is flammable, so keep it away from any flame.

Flushing agents, neutralizing agents, and anticorrosive agents are strong acids or alkalize, so be careful not to get them on your skin.

If you should get any of these on your skin, wash off immediatelywith ample water.

Check all hose clamps except those on the air intake system.

Enter the torque of the hose clamps

24.7.2 CHECK ROPS MOUNTING BOLT NUT TORQUE

Check the torque at four places.

Enter the torque of the ROPS mounting bolt nuts

24.7.3 CHECK TRACK SHOE BOLT TORQUE

Check the bolts used for attaching the shoes to the tracks.

Enter the torque of the track shoe bolt

24.10.1 CLEAN AIR CLEANER ELEMENTS

This machine is equipped with a dry-type air cleaner with replaceable filter elements. The air cleaner has two elements, a primary and a safety. The primary element can be cleaned for a limited number of times before replacement is necessary, however, the safety element must be replaced when plugged. Detailed service procedures for this air cleaner are covered in the following text.

As a precaution against dirt entering the engine:

Make sure the air cleaner connections and the turbocharger mounting gaskets are in good condition and all joints and connections are tight.

Never operate the engine unless a filter element is in place and the filter end cover gasket is installed.

Never remove the element from the air cleaner while the engine is running.

24.10.1.3 PRIMARY FILTER ELEMENT

Check the coolant level in radiator sight glass to make sure coolant is present.

If coolant must be added, remove radiator cap by turning it to the left or counterclockwise up to the safety stop until all pressure is released. Press down on the cap and continue to turn until the cap is free to be removed.

Add fluid until visible in sight glass.

CHECK ENGINE CRANKCASE OIL LEVEL

Stop the engine and check level. For an accurate reading wait for the oil to drain into the crankcase pan. Open hood access door. Remove the oil level gauge (1) and wipe it clean. Reinsert the gauge completely. Remove the gauge and check the oil level. If the level is at or below the ADD mark, add oil through the filler opening (2) to bring the level up to the FULL mark on the gauge.

CHECK EQUIPMENT SYSTEM HYDRAULIC OIL LEVEL

With the oil at operating or ambient temperature, park the machine on level ground, lower the blade to the ground, release the control lever and stop the engine.

Check oil level at sight gauge on the side of the reservoir. Add oil if level is below the center line of the gauge.

The engine is equipped with an automatic belt tensioner that maintains correct tension on the drive belt. To check belt tension a Burroughs type gauge must be used because of the wide drive belt. Proper tension should be 110 to 150 N (80 to 110 lbs).

If a Burroughs type gauge is not available, tension may be checked by belt deflection. Press the belt with your finger at the longest span and measure the deflection. Maximum deflection 9.5 to 12.7mm (0.37 to 0.50 in).

With the automatic tensioner, adjustment isn't required.

To replace the drive belt, place a 12 in. drive breaker bar (1) in the square hole in the belt tensioner. Push the breaker bar UP to loosen the tensioner. Remove the old belt (2). Inspect belt tensioner. The tensioner pulley should spin freely with no rough spots detected under hand pressure. Install the new belt.