Caterpillar 426 - Weekly Maintenance

Axle Universal Joint (Front) - Lubricate

• Apply lubricant to the grease fittings for the drive shaft to the final drives. There are two grease fittings for each drive shaft.

Cab Air Filter - Clean/Replace

• Clean the filter element weekly, but clean the filter element daily when there is a reduction of air circulation.

• Remove the filter cover that is located at the bottom of the right hand console.

• Remove the filter element.

• Clean the filter element with compressed air or pressure water. Direct the air or the water along the pleats of the element. You can also wash the element with clean water and nonsudsing household detergent.

• Rinse the filter element thoroughly with clear water.

• Allow the filter element to air dry. Inspect the element for damage. If the filter element is damaged, replace the filter element.

• Install the filter element.

• Install the filter cover.

• Remove the filter cover that is located on the headliner by the front windshield.

Fuel Tank Water and Sediment - Drain

• The fuel tank is located on the left side of the machine.

• Slowly remove the fuel tank cap in order to relieve pressure.

• The fuel tank drain valve is located on the lower right corner on the front of the fuel tank. Remove the fuel tank drain plug

• Allow the water and sediment to drain into a suitable container

• Install the fuel tank drain plug. Replace the fuel tank cap

Parking Brake - Check/Adjust

• Start the engine. Raise the bucket slightly.

• Engage the parking brake.

• If the machine is equipped with the standard transmission, move the transmission speed shift lever to THIRD gear.

• Move the transmission direction control lever to FORWARD, to NEUTRAL, and back to FORWARD.

• If the machine is equipped with a power shift transmission move the transmission control lever to FOURTH SPEED FORWARD, to NEUTRAL, and back to FOURTH SPEED FORWARD.

• Gradually increase the engine speed to high idle. The machine should not move.

• Reduce the engine speed. Move the transmission to NEUTRAL. Lower the blade to the ground. Stop the engine.

• Reduce the engine speed. Move the transmission to NEUTRAL. Lower the bucket to the ground. Stop the engine.

Adjustment Procedure | If the machine moved during the test, perform the following procedure in order to adjust the parking brake.

• Apply the service brakes.

• Disengage the parking brake.

• As you view the parking brake adjuster knob from the operator seat, turn the knob counterclockwise for one quarter of a turn.

• Repeat steps 1 to 6 in the check procedure.

• If the machine moves during the parking brake test, then perform the adjustment procedure again. If you run out of adjustment on the parking brake adjuster knob, refer to Systems Operation, Testing and Adjusting, SENR1259, “Parking Brake Control - Adjust”.