Caterpillar Mini Hydraulic Excavator 304C CR

Fuel Tank Water and Sediment - Drain

Swing Frame and Cylinder Bearings - Lubricate

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.

Hydraulic System Oil Filter (Return) - Replace

Hydraulic System Oil Filter (Return) - Replace

Sign off on the maintenance procedure

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

Swing Gear and Bearing - Lubricate

Lower all work tools to the ground.

Open the right side access door.

Wipe all grease fittings before you lubricate the grease fittings.

Apply lubricant through fitting (1) until the old lubricant is pushed out from the seal surface.

Apply lubricant through fitting (2).

Rotate the upper structure for 90°.

Repeat Step 5 and Step 6 until the upper structure has rotated 360°.

Close the right side access door.