Caterpillar Mini Hydraulic Excavator 305C CR

Air Conditioner/Cab Heater Filter (Recirculation) - Inspect/Replace

NOTICE: An air recirculation filter element plugged with dust will result in decreased performance and service life to the air conditioner or cab heater. To prevent decreased performance, clean the filter element, as required.

The filter element is located on the lower right side of the cab.

1. In order to remove the filter element, slide the filter element outward.

2. Inspect the filter element. If the filter element is dirty, clean the filter element with a mild solution of soap and warm water.

Note: Do not use organic solvents in order to clean the filter element.

3. The filter element may also be cleaned with a maximum of 200 kPa (30 psi) pressure air.

Note: Refer to Operation and Maintenance Manual, “General Hazard Information” before using pressure air to clean the filter element.

4. After you clean the filter element, inspect the filter element. If the filter element is damaged or badly contaminated, use a new filter element.

Cooling System Coolant Sample (Level 2) - Obtain

Refer to Operation and Maintenance Manual, “Cooling System Coolant Sample (Level 1) - Obtain” for the guidelines for proper sampling of the coolant.

Sample of the coolant obtained as close as possible to the recommended sampling interval?

Supplies for collecting samples can be obtained from your Cat dealer.

Sample submitted for Level 2 analysis?

For additional information about coolant analysis, refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” or consult your Cat dealer.

Sign off on the coolant sample collection and analysis

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.

WARNING: Ensure that the engine can not be started while this maintenance is being performed. To help prevent possible injury, do not use the starting motor to turn the flywheel.

WARNING: Hot engine components can cause burns. Allow additional time for the engine to cool before measuring/adjusting valve lash clearance.

Only qualified service personnel should perform this maintenance. Refer to the Systems Operation/Testing and Adjusting Manual, “Valve Lash and Valve Bridge Adjustment” article or consult your Caterpillar dealer for the complete valve lash adjustment procedure.

WARNING: Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loose the cap slowly to relieve the pressure.

Cooling System Coolant Extender (ELC) - Add

Sign off on the maintenance procedure

Inspect the belts for wear and for cracking

Adjust the belt tension in order to minimize belt slippage

Recheck the belt adjustment after 30 minutes of operation if new belts are installed

Water Pump Belt, Fan Drive Belt, and Alternator Belt

Apply approximately 98 N (22 lb) of force midway between the pulleys

Measure the deflection of the belt. The belt should deflect 8 to 11 mm (5/16 to 7/16 inch)