Caterpillar Backhoe Loader 422E

Differential Oil (Front) - Change

1. Remove oil drain plug (1) and drain the oil into a suitable container.

2. The drain plug is magnetic. Check the plug for metal.

3. Clean the drain plug and install the drain plug.

4. Remove oil level/fill plug (2).

5. Add oil until the oil is level with the threads for the filler plug. Refer to Operation and Maintenance Manual, “Lubricant Viscosities” and Operation and Maintenance Manual, “Capacities (Refill)” for oil.

6. Clean the filler plug and install the filler plug.

Differential Oil (Rear) - Change

The oil change interval should be decreased to 500 hours if more than 50% of the service hours is used for roading and loading.

WARNING: Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.

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

Note: This machine is shipped with Extended Life Coolant. Extended Life Coolant is recommended for use.

Flushing the Extended Life Coolant From the Cooling System

Has the cooling system been flushed with clean water?

Flushing a Standard Coolant From the Cooling System

Has the cooling system been flushed with a Caterpillar cleaning agent?

Has the lift cylinder brace been installed?

Backhoe Boom, Stick, Bucket, and Cylinder Bearings - Lubricate

Position the backhoe into the service position that is shown above. Lower the bucket to the ground. Relieve the hydraulic pressure and remove the load from the greased joints.

Apply lubricant to the grease fitting (1) for the rod end of the stick cylinder.

Apply lubricant to the grease fitting (2) for the head end of the boom cylinder and the head end of the stick cylinder.

Apply lubricant to the grease fitting (3) for the rod end of the boom cylinder.

Apply lubricant to the grease fitting (4) for the boom pivot. There is one grease fitting on each side of the machine.

Apply lubricant to the grease fitting (5) for the bucket pivot pin.

Apply lubricant to the grease fitting (6) for the link.

Apply lubricant to the grease fitting (7) for the rod end of the bucket cylinder.

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.

Refer to Special Publication, NENG2500, “Caterpillar Dealer Service Tool Catalog” for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Supplies for collecting samples obtained from your Caterpillar dealer?

Refer to Operation and Maintenance Manual, “Cooling System Coolant Sample (Level 1) - Obtain” for the guidelines for proper sampling of the coolant.

Sample of the coolant obtained as close as possible to the recommended sampling interval?

Submit the sample for Level 2 analysis.

For additional information about coolant analysis, refer to Special Publication, SEBU6250, “Caterpillar Machine Fluids Recommendations” or consult your Caterpillar dealer.

Sign off on the coolant sample collection

1. Clean the area around the breathers. Remove the breather from the front axle.

2. Wash the breather in clean nonflammable solvent. Wipe the breather dry and check the breather for damage.

3. Install the clean breather back into the axle. Replace the breather if the breather is damaged.

Note: Make sure that the slot in the breather is parallel to the axle housing.

If new belts are installed, check belt adjustment after 30 minutes of operation. For multiple belt drive applications, always replace the belts in matched sets. Replacing only one belt of a matched set will cause the new belt to carry more load because the older belts are stretched. The additional load on the new belt could cause the new belt to break.

2. Inspect the condition of the serpentine belt. If the belt is worn or frayed, replace the belt.