Caterpillar Mini Hydraulic Excavator 301.8

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

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

Remove guard (2) under the fuel tank to access the coolant drain hose.

Remove coolant drain hose cap (3) and allow the coolant to drain into a suitable container.

Flush the cooling system with water until the draining water is transparent.

Sign off on the maintenance procedure

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

Swing Gear and Bearing - Lubricate

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

Is the machine parked on a level surface?

Are all work tools lowered to the ground?

Is the hydraulic lockout control in the RAISED position?

Fittings (1), (2), and (3) for the swing cylinder, bearing, and gear are on the right side of the machine on the upper carriage.

Are the fittings wiped and lubricated?

Is the upper structure rotated for 90°?

Is grease applied to the fitting for the swing bearing?