The Caterpillar Mini Hydraulic Excavator 307.5 is a versatile and compact machine designed for efficient digging and excavation tasks. Known for its reliability and performance, this excavator is ideal for construction, landscaping, and utility work, providing operators with exceptional maneuverability and power.

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Manual for Caterpillar Mini Hydraulic Excavator 307.5

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Documents & Manuals

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

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

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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 307.5

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Maintenance Plans for Caterpillar Mini Hydraulic Excavator Model 307.5

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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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3 Yearly Mini Hydraulic Excavator Maintenance

Seat Belt - Replace

Seat belt installation date

Is the date of installation label present?

If the date of installation label is missing, replace the belt within 3 years from the year of manufacture as indicated on the belt webbing label, buckle housing, or installation tags (non-retractable belts).

Enter the year of manufacture as indicated on the belt webbing label, buckle housing, or installation tags (non-retractable belts).

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

New seat belt manufacture date

Does the new seat belt exceed the install by date on the label?

A complete seat belt system should be installed with new mounting hardware.

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When Required Mini Hydraulic Excavator Maintenance

Battery or Battery Cable - Inspect/Replace

Recycle the Battery

Blade Cutting Edges - Inspect/Replace

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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.

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250 Hourly Mini Hydraulic Excavator Maintenance

Belts - Inspect/Adjust/Replace

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.

Water Pump Belt, Fan Drive Belt, and Alternator Belt

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

Note: To gain better access, remove (place aside) the coolant overflow tank.

2. Apply approximately 98 N (22 lb) of force midway between the alternator and crankshaft pulleys.

3. Measure the deflection of the belt. The belt should deflect 10 to 12 mm (25/64 to 15/32 inch).

4. If the deflection is not correct, loosen alternator adjusting bolt (1) and mounting bolt (3). Move the alternator (2) to adjust the belt tension.

5. When the adjustment is correct, tighten bolt (1) to a torque of 25.5 ± 1.5 N·m (18.8 ± 1.1 lb ft). Tighten bolt (3) to a torque of 52.5 ± 3 N·m (38.7 ± 2.2 lb ft).

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