Caterpillar Hydraulic Excavator 323

Is the date of installation label present?

If the date of installation label is missing, replace the belt within 3 years from the year of manufacture as indicated on the belt webbing label, buckle housing, or installation tags (non-retractable belts).

Year of manufacture as indicated on the belt webbing label, buckle housing, or installation tags (non-retractable belts)

Consult your Cat dealer for the replacement of the seat belt and the mounting hardware.

Manufacture date of new seat belt

Does the manufacture date of new seat belt exceed the install by date on the label?

A complete seat belt system should be installed with new mounting hardware.

Warning: Engine hood and engine hood parts can be hot while engine is running or immediately after engine shutdown. Hot parts or hot components can cause burns or personal injury.

Warning: Personal injury can result from hot coolant, steam and alkali.

Warning: Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

Warning: Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

Pressurized system! The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off.

Always inspect the condition of the seat belt and the condition of the seat belt mounting hardware before you operate the machine. Replace any parts that are damaged or worn before you operate the machine.

Note: Caterpillar recommends the use of 5% molybdenum grease for lubricating the boom, and stick linkage.

Note: Caterpillar recommends the use of 5% molybdenum grease for lubricating the boom, and stick linkage.

Clean the battery surface with a clean cloth. Keep the terminals clean and keep the terminals coated with petroleum jelly. Install the post cover after you coat the terminal post with petroleum jelly.

Tighten the hold-downs for the battery in order to prevent the batteries from moving during machine operation.

Note: This engine is equipped with a belt tightener that automatically adjusts the belt to the correct tension.

1. Unlatch the engine hood and raise the engine hood.

2. Inspect the condition of the serpentine belt. Over time the belt ribs will lose material (C). The space between the ribs will increase (D). The loss of material will cause the pulley sheave to contact the belt valley. This will lead to belt slippage and accelerated wear (E). Replace the belt if the belt is worn or frayed.

3. If the belt requires replacement, perform Step 3a through Step 3f.

Oil Filter (Hydraulic Hammer) - Replace

WARNING: Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

The use of hydraulic hammers shortens the life of hydraulic oil. If a hydraulic hammer is used, the maintenance interval is shortened.

Park the machine on level ground in the service position as shown.

Move the hydraulic lockout control to the UNLOCKED position.

Turn the engine start switch to the ON position.

Move the joysticks and the travel levers/pedals to the full stroke positions to relieve the pressure in the hydraulic lines.

Turn the engine start switch to the OFF position and return the lever for the hydraulic lockout control to the LOCKED position.

WARNING: Pressurized system! The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off. Relieve pressure by slowly turning the cap until the cap reaches the secondary stop.

Diesel Exhaust Fluid Filter - Replace

Open the Diesel Exhaust Fluid (DEF) compartment.

Ensure that the area around the DEF filter is clean and free from dirt. The DEF filter threaded cap and the filter element are a combined assembly.

Remove the protective cover (1) from DEF pump housing (2).

Remove the DEF filter assembly (3) and discard.

Install a new DEF filter assembly into the DEF pump housing.

Tighten the filter assembly to 10 N·m (88.5 lb in). Install the protective cover.

Turning on the power will automatically prime the DEF system.

Sign off on the 1500 Hourly Hydraulic Excavator Maintenance