Volvo VNL 780 Operator's Manual page 33

Maintenance
Visually inspect cooling system components for damage, and/or misalignment.
Primary system components requiring noise related inspection include fan blades, fan clutch,
fan shroud, fan ring, and recirculation shields. Check fan blades, fan ring, fan shroud, belt
tensioner and recirculation shields for any damage. Verify that fan blades clear the fan
ring. Inspect all related fasteners, brackets, and clamps for damage and tightness. Confirm
operation of temperature modulated fan clutch.
Regulatory Compliance
Acts that constitute tampering with the Cooling System:
Removing or rendering inoperative cooling system components (such as the temperature
modulated fan clutch, fan shroud, fan ring, recirculation shields, etc.).
Exhaust System
WARNING
Hot engine! Avoid all movable parts or
hot engine parts, exhaust gases, and/or
fluids. A hot engine, exhaust, and/or
fluids can cause burns.
Maintenance
Make sure the exhaust system is intact. Inspect for damage, misalignment and/or leakage.
Primary system components requiring noise related inspection include exhaust manifold,
turbocharger, and all exhaust system (rigid and flexible) piping. Closely check the system
for exhaust leaks. Special attention should be given to all welds, seams, gaskets, support
points, clamps, couplings and connections.
Inspect all exhaust system fasteners, brackets, and clamps for damage and tightness.
Regulatory Compliance
Acts that constitute tampering with the Exhaust System:
Removing or rendering inoperative exhaust system components (such as the pipes, clamps,
etc.).
INTRODUCTION 23