Komatsu Bulldozer D38E-1

24.12.1 GENERAL: Proper maintenance and mechanical efficiency is enhanced during seasonal air temperatures changes, when the following instructions are followed.

24.12.2 OUTSIDE SOURCE OF HEAT: Machines left outside for prolonged periods in sub-zero weather will suffer from cold-soak. Lubricants become viscous and incapable of lubricating moving parts.

Is there a source of outside heat available for the machine?

24.12.3 LUBRICATION: Lubricate and service your machine at intervals specified in 23.1 MAINTENANCE SCHEDULE CHART.

Have you selected oils and lubricants specified at Anticipated Air Temperature for seasonal preparations?

24.12.4 FUEL SYSTEM: For details of the fuel to use, see 20.1 PROPER SELECTION OF FUEL, COOLANT AND LUBRICANT.

24.12.5 COOLING SYSTEM: Prepare the cooling system as follows:

Check the entire system for leaks.

Inspect the condition of all hoses and replace the hoses and hose clamps as necessary.

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.

24.6.1 REPLACE ENGINE OIL FILTER

The lubricating oil filter is a spin-on type. This filter cannot be cleaned and should not be disturbed except when it is necessary to replace it.

Use only recommended filters available from your Komatsu distributor.

1. After reaching operating temperature, stop the engine and drain the crankcase oil. Refer to 24.6.2 CHANGING CRANKCASE OIL.

2. Clean the outside of the filter. Remove the spin-on type filter by turning it counterclockwise. Discard the old filter in a suitable, covered refuse container.

3. Fill the new filter element with clean engine oil and apply a little clean engine oil to the seal.

4. Thread the filter on by hand (do not spin) by turning it clockwise until the seal just makes contact the filter header. Give the element an additional 1/4 to 1/2 turn. Change the crankcase oil per step 24.6.2 following.

24.5.1 BLADE CUTTING EDGE HARDWARE

Check the torque of the blade cutting edge hardware.

U Plow bolt nuts: 455 N*m (335 Ibf ft);

24.1 .I BLADE CUTTING EDGE HARDWARE

Check the torque of the blade cutting edge hardware.

Enter the torque of the blade cutting edge hardware in Narn

Check the torque of the track shoe bolt.

Enter the torque of the track shoe bolt in Nom

Sign off on the bulldozer maintenance