CAT Excavator 325

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: 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.

Bucket Linkage Lubrication Steps

Oil Filter (Hydraulic Hammer) - Replace

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.

Sign off on the maintenance procedure

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.

Date of manufacture of new seat belt

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

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

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