Caterpillar Mini Hydraulic Excavator 302 CR

Swing Gear and Bearing - Lubricate

WARNING: Do not rotate the machine during lubrication. Danger of severe crushing that can cause severe injury or death.

Sign off on the maintenance procedure

Cooling System Coolant (ELC) - Change

NOTICE: Do not change the coolant until you read and understand the cooling system information in Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations”. Failure to do so could result in damage to the cooling system components.

NOTICE: Mixing ELC with other products will reduce the effectiveness of the coolant. This could result in damage to cooling system components.

If Caterpillar products are not available and commercial products must be used, make sure they have passed the Caterpillar EC-1 specification for premixed or concentrate coolants and Caterpillar Extender.

Note: If cooling system samples Level 1 and Level 2 are not performed, and ELC not added, The coolant should be changed every 2 years.

Note: This machine was filled at the factory with Caterpillar Extended Life Coolant.

If the coolant in the machine is changed to Extended Life Coolant from another type of coolant, see Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations”.

Open the right side access door.

Loosen radiator cap (1) slowly to release pressure. Remove the radiator cap.

Designate a person to inspect the hook frequently. The designated person should inspect the hook prior to operation and during operation. The designated person will determine if the conditions that are found are a hazard. The designated person will determine if a more detailed inspection is required.

Inspect the hook for any distortion such as bends in the hook or twists in the hook.

Inspect the dimensions of the throat (E) and (F). An increase in the dimensions of the throat must not exceed 5% of the original dimensions of the throat.

Inspect the hook for wear. An increase in the nominal dimensions (B1), (B2),(C1),(;C2),(H), and (L) of the hook must not exceed 10% of the original nominal dimensions of the hook.

Inspect the hook for cracks, nicks, or gouges.

Ensure that the latch properly engages. Inspect the latch for any damage. Ensure that the latch is not malfunctioning.

Before continuing to operate the hook, the hook must be repaired or replaced if any of the above conditions exist. Refer to Special Instruction, REHS3357, “Procedure for Installation or Replacement of a Lifting Hook or a Lifting Yoke on Certain Quick Couplers” for additional information.

Sign off on the hook inspection

Boom and Stick Linkage - Lubricate

Boom, Stick, and Frame - Inspect

Cooling System Coolant Sample (Level 1) - Obtain

Engine Air Filter Primary Element - Clean/Replace

Final Drive Oil Sample - Obtain

Fuel Lift Pump Strainer - Replace

Fuel System Primary Filter (Water Separator) Element - Replace

Water Pump Belt, Fan Drive Belt, and Alternator Belt

1. Open the engine access door.

Note: Use a 144-0235 Belt Tension Gauge to measure belt tension. Refer to Table 33 for proper belt tension adjustment.

4. If the tension is not correct, loosen bolt (1), and alternator mounting bolts (2) and (3). Adjust alternator position.

5. When the adjustment is correct, tighten bolt (1), and alternator mounting bolts (2) and (3) securely.

6. Check the tension of the belt again.