The Caterpillar Mini Hydraulic Excavator 309 CR is a versatile and compact machine designed for efficient digging and excavation tasks. Known for its reliability and performance, this model is ideal for construction and landscaping projects, providing excellent maneuverability and power in tight spaces.

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Manual for Caterpillar Mini Hydraulic Excavator 309 CR

MAINTENANCE RESOURCES

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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

Pre-built workflows to keep your asset running smoothly.

Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Caterpillar Mini Hydraulic Excavator 309 CR

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Maintenance Plans for Caterpillar Mini Hydraulic Excavator Model 309 CR

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1000 Hourly Mini Hydraulic Excavator Maintenance

Battery - Clean

Steps to clean the battery

Battery cleaned properly?

Battery Hold-Down - Tighten

Steps to tighten the battery hold-down

Battery hold-down tightened properly?

Belts - Replace

Steps to replace the belts

Belts replaced properly?

Run this procedure

100 Hourly Mini Hydraulic Excavator Maintenance

Swing Bearing - Lubricate

Swing Gear - Lubricate

Sign off on the 100 Hourly Mini Hydraulic Excavator Maintenance

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10 Hourly or 1 Daily Mini Hydraulic Excavator Maintenance

Blade Linkage - Lubricate

Boom and Stick Linkage - Lubricate

Air Cleaner Dust Valve - Clean/Inspect

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

Bucket Linkage - Lubricate

Cab Air Filter (Fresh Air) - Clean/Replace

Cooling System Coolant Level - Check

Engine Air Filter Service Indicator - Inspect

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12000 Hourly or 6 Yearly Mini Hydraulic Excavator Maintenance

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.

Remove the pressure cap.

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.

Run this procedure

1500 Hourly Mini Hydraulic Excavator Maintenance

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).

Close the engine access door.

Sign off on the maintenance procedure

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