Caterpillar Off-Highway Truck 773B

Indicators and gauges operation test

Supplemental steering operation test

1. Fuses and circuit: The fuses and circuit breakers are located in the cab below the right side of the dash (1).

2. Windshield wiper and body and frame inspection: Inspect the windshield wiper located in front of the windshield (2). Inspect the body and frame for cracks. Always pay particular attention to locations on the frame where castings and fabricated plates meet (2).

3. Windshield washer reservoir: The windshield washer reservoir is located in the engine compartment at the right rear corner of the cab (3).

4. Ether cylinder: The ether starting aid system ether cylinder is located in the engine compartment on the right side of the radiator shroud (4).

- A full ether cylinder weighs approximately 1047 g (37 oz.) and an empty cylinder weighs approximately 453 g (16 oz.).

- Cold weather causes rough combustion and white exhaust smoke from unburned fuel. Ether injection will reduce the duration and severity of unburned fuel symptoms.

5. Oil cooler screen: The oil cooler screen is located in the black manifold below the oil cooler (5).

6. Oil filter inspection: Whenever an oil filter is removed for replacement (engine filter shown) (6), cut the filter open and inspect for metal or other debris. Use a magnet to differentiate between ferrous and nonferrous metals.

The following items must be serviced every 250 Hours or Monthly.

- Engine oil and filters: Change

- Engine valve lash: Adjust on new or rebuilt engines only

- Cooling system conditioner: Change element

- Air conditioner: Test and adjust belt

- Fan drive bearing and belt tightener: Lubricate

- Alternator and fan belts: Test and adjust

Differential/Final Drive Oil sampling

Transmission Oil sampling: The transmission oil sample valve is located on the left side of the transmission in a manifold with the transmission lube oil pressure tap.

Hoist, Torque Converter and Brake Cooling Oil: The torque converter, hoist and brake cooling oil sample valve is located on the torque converter in the torque converter outlet manifold.

Hoist, Torque Converter and Brake Cooling Oil sampling

Warning: This maintenance check requires trained personnel with PPE!

Enter the concentration of coolant conditioner

Is the coolant conditioner concentration between 3 - 6%?

Enter the concentration of Caterpillar Antifreeze

Is the Caterpillar Antifreeze concentration between 30 - 60%?

Enter the engine operating temperature

Is the engine operating temperature between 88 and 99°C (190 and 210°F)?

Enter the cooling system pressure

Is the cooling system pressure between 55 and 110 kPa (8 and 16 psi)?