Caterpillar Mini Hydraulic Excavator 303.5C CR

Swing Gear and Bearing - Lubricate

Lowered all work tools to the ground?

Opened the right side access door?

Wiped all grease fittings before lubrication?

Applied lubricant through fitting (1) until the old lubricant is pushed out from the seal surface?

Applied lubricant through fitting (2)?

Rotated the upper structure for 90°?

Repeated Step 5 and Step 6 until the upper structure has rotated 360°?

Closed the right side access door?

Is the date of installation label missing?

If the date of installation label is missing, replace belt within 3 years from the year of manufacture

Year of manufacture as indicated on belt webbing label, buckle housing, or installation tags

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

Do not exceed install by date on label

Complete seat belt system installed with new mounting hardware?

Lower all the work tools and the blade to the ground.

Wipe all grease fittings before lubricating.

1. Apply lubricant to grease fitting (2) at the head end of the blade cylinder. Apply lubricant to grease fitting (1) at the rod end of the blade cylinder.

2. Apply lubricant to grease fittings (3) and (4) for the blade linkage.

Note: Caterpillar recommends the use of 5% molybdenum grease for lubricating the bucket linkage. Refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” for more information on molybdenum grease.

Apply lubricant through all fittings after operation under water.

Wipe all fittings before you apply lubricant.

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

Additional information on the addition of extender

Sign off on the maintenance procedure

Cooling System Coolant Level - Check

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

1. Open the right side access door.

2. Maintain the coolant level between “FULL” mark (A) on the coolant reservoir and “LOW” mark (B) on the coolant reservoir.

Note: Refer to Operation and Maintenance Manual, “General Hazard Information” for information on containing fluid spillage.

3. If additional coolant is necessary, remove the filler cap for the coolant reservoir and add the appropriate coolant mixture. Install the filler cap

4. If the coolant reservoir is empty, remove the cooling system pressure cap slowly in order to relieve pressure. Add coolant to the radiator.

5. Inspect the condition of the cap gasket. If necessary, replace the cap.

6. Install the cooling system pressure cap.