Peterbilt Truck 379

Clean block with steam or solvent

Tighten manifold nuts to specified torque

Tighten oil pan capscrew to specified torque

Check Drive pulleys for tightness

Check Turbocharger manifold and mounting

Check Radiator shutters controls

Check All lines and seals for leaks

WARNING! You can be badly injured trying to fix tires. Don’t mount or dismount a tire yourself; have any wheel service performed by an expert. And stand away from the tire assembly while the expert is working

Inspect each tire for damage to side-walls, cuts, cracks, uneven wear, rocks between duals, etc.

Check for damage to the wheel assembly.

Check between dual wheels for any damage.

Enter the maximum tire pressure indicated on the sidewall of a tire.

Check pressure only when the tires are cool. Warm or hot tires cause pressure buildup and will give you an inaccurate reading. So never deflate a warm tire to the specified pressure.

Are the tires cool before checking the pressure?

Lower tire pressure does not give you more traction on ice or snow. This is an old myth that refuses to die. Underinflation actually reduces traction, steering control and tire load capacity.

Sign off on the tire inflation pressure check.

WARNING! The air conditioning system is under pressure. If not handled properly, it could explode, causing injury to you and your vehicle.

NOTE: Engines equipped with poly-vee belts are equipped with tensioners. No belt adjustments can be made. Replace a poly-vee belt when the indicator on the tensioner is no longer within the recommended (green) range.

Check the compressor belt for condition and proper tension. Adjust 105 - 125 pounds.

Check the compressor and drive clutch for noise and vibration.

Check the evaporator core and condenser core for debris restricting air flow.

CAUTION: Small particles blown by compressed air could injure your eyes. Wear eye protection any time you blow compressed air.

Check all hoses for kinks, deterioration, chafing, and leaks.

On tilt-cab vehicles, verify that hoses are routed around the pivot point so that lifting the cab does not strain them.

Check all components and connections for refrigerant leaks.

Check concentration of antifreeze solution and condition of coolant

Lubricate driveshaft (Models 1610-1810 & SPL-90 slip member & U-joints)

Check the exhaust system for leaks and proper support

Clean bypass oil filter and change element

Sign off on the monthly truck maintenance

Lubricate kingpin bushings and tie rod ball ends with proper grease

Check the U-bolts torque. Tighten to specified torque value as required

Check the system for broken pipes, leaks, joint integrity, cleanliness, and proper support

Inspect fuel tanks, brackets, hoses, and fittings for correct location, tightness, abrasion damage, and leaks; repair or replace as required

Lubricate Driveshafts (Model SPL-100 slip member & U-joints) and (Models SPL-140/140HD/170/170HD/250/250HD slip member & U-joints)

Lubricate hinges and latches with silicone spray

Check the tilt pump oil level, refill as required

Clean cab air filter, replace after a maximum of 3 cleanings