CAT CAT Excavator 325 325

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.

Diesel Exhaust Fluid Filter - Replace

1. Open the rear access door on the left side of the machine.

For clarity, the DEF assembly has been removed from the compartment.

2. Ensure that the area around the DEF filter is clean and free from dirt.

3. Unscrew the cap, remove expansion device (1) from DEF filter (2). Then, remove the DEF filter using special tool (3) that comes with the new filter. Discard the old filter and expansion device.

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

5. Tighten the filter cap to 20 ± 5 N·m (15 ± 4 lb ft).

6. Turning on the power will automatically prime the DEF system.

Diesel Exhaust Fluid Injector - Replace

Warning: This maintenance check requires trained personnel with PPE!

Always use a designated pump for oil sampling, and use a separate designated pump for coolant sampling.

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product.

Dispose of all fluids according to local regulations and mandates.

The coolant sampling port is on the radiator.

Never collect samples from expansion bottles.

Never collect samples from the drain for a system.

Cooling system coolant sampled and monitored?

Choose the type of coolant used

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.

Do not allow these parts to contact your skin, when engine is running or immediately after engine shutdown. Use protective clothing or protective equipment to protect your skin.

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

At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.

Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand.

Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.

Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.

NOTICE: Do not change the coolant until you read and understand the cooling system information in Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations”.

Failure to do so could result in damage to the cooling system components.

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: 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.