Caterpillar Mini Hydraulic Excavator 301.8

Are the hold-downs for the battery tightened?

Engine Valve Lash - Check/Adjust

Has the engine valve lash been checked and adjusted?

Hydraulic System Oil Filter (Return) - Replace

Hydraulic System Oil Filter Replacement Steps

Sign off on the 1000 Hourly Mini Hydraulic Excavator Maintenance

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?

Wipe all fittings before lubricating

Apply lubricant to the fittings for the arms (1) that support the blade

Apply lubricant to the fittings of the blade cylinder (2)

Boom and Stick Linkage - Lubricate

Position the machine into the service position

Wipe all fittings before you apply lubricant

Apply lubricant to grease fittings (1) at each cylinder end

Apply lubricant to grease fittings (2) at the boom cylinder pin joint

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.

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.