Caterpillar Skid Steer Loader 259B3

The plugs for the drive chain cases as the plugs are viewed from the underside of the machine.

1. Remove the drain plug for the left drive chain case and the right drive chain case. Allow the oil to drain into a suitable container.

2. Apply 169-5464 Quick Cure Primer and 5P-3413 Pipe Sealant to the threads on the drain plugs. Install the drain plugs.

3. Remove the filler plug for the right side drive chain case. Fill the drive chain case with oil to the bottom of the threads on the fill port. Refer to Operation and Maintenance Manual, “Lubricant Viscosities” and Operation and Maintenance Manual, “Refill Capacities”.

4. Apply 169-5464 Quick Cure Primer and 5P-3413 Pipe Sealant to the threads on the filler plug. Install the filler plug.

5. Repeat the process for the left side drive chain case.

The breathers for the drive chain cases are located underneath the cab (1). Refer to Operation and Maintenance Manual, “Cab Tilting”.

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: The machine was shipped from the factory with Extended Life Coolant (ELC) in the cooling system.

Drain the coolant whenever the coolant is dirty or whenever the coolant is foaming.

Machine cooled down before coolant change?

Radiator cap loosened slowly to relieve system pressure?

Drain plug removed or drain valve opened and coolant drained into a suitable container?

1. Position one final drive so that the oil fill/drain plug (1) is at the top.

Note: Refer to Operation and Maintenance Manual, “General Hazard Information” for information on Containing Fluid Spillage.

2. Use an 8 mm (5/16 inch) allen wrench. Remove the oil check plug (2).

3. Check the oil level. The oil should be near the bottom of the opening fo the oil check plug (2).

4. Add oil through the opening for the oil fill/drain plug (1), if necessary.

Note: Overfilling the final drive will cause the seals on the travel motor to allow hydraulic oil or water to enter the final drive. This may contaminate the final drive.

6. Install the oil plugs. Tighten the oil plugs to a torque of 27 ± 1 N·m (20 ± 0.7 lb ft).

Position one final drive so that the oil fill/drain plug is at the bottom

Remove the oil plugs and allow the oil to drain into a suitable container

Check the drained oil for large metal chips or a significant number of metal particles

Clean the plugs and inspect the plugs. Replace a worn plug or a damaged plug

Position the final drive so that the oil fill/drain plug is at the top

Add oil through the opening of the oil fill/drain plug that is now at the top

Fill the final drive to the bottom of the opening for the oil check plug

Install the two oil plugs. Tighten the oil plugs to a torque of 27 ± 1 N·m

Air Cleaner Dust Valve - Clean/Inspect

Service the air filter elements when the alert indicator for air filter restriction lights. Refer to Operation and Maintenance Manual, “Alert Indicators” for information about the indicator.

1. Open the engine access door.

2. The air filter housing is located in the engine compartment.

3. Check the air cleaner dust valve after every ten service hours or at the end of each day. Actuate the valve by squeezing the lips of the valve in order to remove any accumulated debris.

Apply lubricant to all grease fittings.