Caterpillar Mini Hydraulic Excavator 301.7 CR

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

For additional information on the addition of extender, see Operation and Maintenance Manual, SEBU6250, “Caterpillar Coolant Recommendations” or consult your Caterpillar dealer.

Sign off on the coolant extender addition

WARNING: Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

NOTICE: If the machine is filled with non-biodegradable hydraulic oil and biodegradable hydraulic oil is wanting to be used, consult a Cat dealer. Biodegradable hydraulic oil can NOT be added to the system by performing an ordinary hydraulic oil change. Damage to the hydraulic system can occur.

NOTICE: Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Park the machine on level ground. Prepare the machine for maintenance.

WARNING: Pressurized system! The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off. Relieve pressure by slowly turning the cap until the cap reaches the secondary stop.

Relieve the internal pressure in the hydraulic tank by slowly loosening oil filler cap (1).

Open drain valve (2) and attach a drain hose.Allow the oil to drain into a suitable container.

Check the hydraulic tank for contamination and clean if necessary.

Every 10 Service Hours or Daily First 100 Hours:

Wipe all fittings before lubricating.

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

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

Boom and Stick Linkage - Lubricate

Note: Caterpillar recommends the use of 5% molybdenum grease for lubricating the boom and stick linkage. Refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” for more information on grease.

1. Position the machine into the service position.

2. Wipe all fittings before you apply lubricant.

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

Tighten the hold-downs for the battery in order to prevent the batteries from moving during machine operation.

Engine Valve Lash - Check/Adjust

Ensure that the engine cannot be started while this maintenance is being performed.

Allow additional time for the engine to cool before measuring/adjusting valve lash clearance.

Steps to change Final Drive Oil

Hydraulic System Oil Filter (Return) - Replace

Steps to replace Hydraulic System Oil Filter