Caterpillar Backhoe Loader 444E

Note: The normal hydraulic oil change interval is at every 2000 Service Hours or 1 Year. By performing S·O·S oil analysis, the hydraulic oil change interval may be extended to 4000 Service Hours or 2 Years. S·O·S oil analysis must be performed at every 500 Service Hours or 3 Months in order to extend the hydraulic oil change interval.

The results from the S·O·S oil analysis will determine if the hydraulic oil change interval may be extended. If S·O·S oil analysis is not available, the hydraulic oil change interval must remain at every 2000 Service Hours or 1 Year.

Refer to the Operation and Maintenance Manual, “S·O·S Information”.

Note: Cat HYDO Advanced 10 has a 50% increase in the standard oil drain interval for machine hydraulic systems (3000 hours versus 2000 hours) over second and third choice oils - when following the maintenance interval schedule for oil filter changes and for oil sampling that is stated in the Operation and Maintenance Manual for your particular machine.

6000 hour oil drain intervals are possible when using S·O·S Services oil analysis. Contact your Cat dealer for details.

Operate the machine for a few minutes in order to warm the hydraulic system oil.

The machine should be level . Lower the bucket to the ground and apply slight downward pressure. Engage the parking brake and stop the engine.

The hydraulic tank filler cap is located under the access door on the top of the engine compartment.

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

Brake Reservoir Oil Level - Check

Cooling System Coolant Level - Check

Engine Air Filter Service Indicator - Inspect

Fuel System Water Separator - Drain

Note: A qualified service person should perform the valve lash check and/or the valve lash adjustment. Special tools and training are required.

Was the valve lash check performed successfully?

If not, describe the issues encountered

Sign off on the engine valve lash check

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.

Cooling System Water Temperature Regulator - Clean/Replace

Thermostat replaced regularly to avoid engine damage

Replace the thermostat after the cooling system has been cleaned

If only replacing the thermostat, drain the cooling system coolant to a level that is below the thermostat housing

Caterpillar engines incorporate a shunt design cooling system. It is mandatory to always operate the engine with a thermostat

Hose removed from the thermostat housing assembly

Thermostat housing assembly removed