Caterpillar Mini Hydraulic Excavator 308 CR

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.

NOTICE: The V-belt must be tensioned correctly. Failure to tension the belt properly could cause damage to the belt and/or to the air conditioner compressor.

Your engine can be equipped with a water pump, with a fan drive, and with an alternator. Your engine can also be equipped with accessory drive belts. Adjust the belt tension to minimize belt slippage. Belt slippage will decrease the belt life. Belt slippage will also cause poor performance of the alternator and of any driven equipment.

Water Pump Belt, Fan Drive Belt, and Alternator Belt

1. Open the engine access door and remove the fan guard.

Sign off on the 100 Hourly Mini Hydraulic Excavator Maintenance

Every 10 Service Hours or Daily First 100 Hours

Note: Caterpillar recommends the use of 5% molybdenum grease for lubricating the blade linkage.

Refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” for more information on molybdenum grease.

Wipe all fittings before you apply lubricant.

1. Apply lubricant through fitting (1). This fitting is on the rod end of the blade cylinder.

2. Apply lubricant through fitting (4). This fitting is on the head end of the blade cylinder.

3. Apply lubricant through fitting (2) and through fitting (3). These fittings are on the bar that supports the blade.

Boom and Stick Linkage - Lubricate

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.

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

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

NOTICE: Mixing ELC with other products will reduce the effectiveness of the coolant.

Gain access to the radiator cap by opening access cover (1).

Make sure that the cooling system has cooled down. Loosen the cooling system pressure cap (3) slowly to relieve system pressure.

Inspect the gasket on the pressure cap. If the gasket is damaged, replace the pressure cap.

Open the rear access door on the right side of the machine.

Engine Crankcase Breather - Replace

Open the engine access door at the rear of the machine. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

The engine crankcase breather is located in the engine compartment on the right-hand side of engine. A replaceable filter element is located inside the engine crankcase breather.

Remove cover (4) and remove filter element (2).

Clean housing (1) and cover (4).

Inspect O-ring for damage. Replace if necessary.

Install a new filter element and Install cover (4).

Sign off on the maintenance procedure