Komatsu Wheel Loader WA320-8

1. Stop the engine to replace belt.

2. Open the engine access door. Refer to Operation and Maintenance Manual, Access Doors and Covers.

3. Loosen the quarter-turn fasteners (1) on the front of the belt protection guard, and remove guard to access belt.

4. Loosen the mounting bolt and adjusting bolt, decrease tension in belt.

6. Install new belt. Be sure that the belt is fully seated on the pulleys.

7. Move the alternator until the correct tension 534 ± 22 N·m (120 ± 5 lb) is reached.

Note: A 144-0235 Borroughs Belt Tension Gauge may be used to measure belt tension. This measurement should be taken between the alternator pulley and the crankshaft pulley.

Air Cleaner Dust Valve - Clean/Inspect

Bogie and Idler - Inspect/Replace

Engine Compartment - Inspect/Clean

Fuel System Primary Filter (Water Separator) Drain

Hydraulic System Oil Level - Check

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.

Is the machine cool before changing the coolant?

Did you open the engine access door and raise the radiator guard?

Did you slowly loosen the radiator cap to relieve system pressure and remove the cap?

Did you locate the drain for the coolant system and use the attached drain hose on the valve?

Did you remove the access panel under the rear of the machine and pull the drain hose through the access hole?

Engine Crankcase Breather - Replace

Note: Only applies to engines with aftertreatment.

Open the engine access door. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

Tilt the radiator upward. Refer to Operation and Maintenance Manual, “Radiator Tilting”.

The breather is located in the engine compartment on the right-hand side of engine. There is cap on the breather and a replaceable element inside.

Note: This service may be performed without removing the housing from the engine.

Remove the breather cap and remove the filter element.

Note: The C2.2 and C3.3B are equipped with cap on bottom portion of the canister. Use a wrench to remove the breather cap. The C3.8 is equipped with cap on top of canister, remove cap by applying downward pressure on the cap while turning.

Clean the housing and the cap for the breather.

Cooling System Coolant Sample (Level 2) - Obtain

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.

Coolant sample obtained from the radiator?

Warning: Personal injury or death can result without releasing all of the hydraulic pressure. Release all the pressure from the hydraulic system before any lines are disconnected.

Hydraulic oil tank cap removed?

Hydraulic oil tank drain plug removed?

Oil drained into a suitable container?

Drain plug installed into the tank?