Doosan HP375WCU, Operation And Maintenance Manual

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Operating & Maintenance Manual Noise Emission
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D. Fasteners
All fasteners such as hinges, nuts, bolts, clamps, screws, rivets, and latches should be
inspected for looseness after each 100 hours of operation. They should be retightened,
repaired, or if missing, replaced immediately to prevent subsequent damage and noise
emission increase.
E. Enclosure Panels
Enclosure panels should also be inspected at 100 hour operational intervals. All panels that
are warped, punctured, torn, or otherwise deformed, such that their noise containment
function is reduced, should be repaired or replaced before the next operation interval. Doors,
access panels, and hatch closures especially, should be checked and adjusted at this time to
insure continuous seating between gasket or acoustic material and the mating frame.
F. Air Intake and Engine Exhaust
Engine and compressor air intake and engine exhaust systems should be inspected after each
100 hours of operation for loose, damaged, or deteriorated components. Repairs or
replacements should be made before the next period of use.
G. Cooling Systems
All components of the cooling system for engine water and compressor oil should be inspected
every 250 hours of use. Any discrepancies found should be corrected before placing the unit
back in operation. Unrestricted airflow over the radiator and oil cooler must be maintained at
all times during operation.
H. Isolation Mounts
Engine/airend isolation mounts should be inspected after each 250 hours of operation. Those
mounts with cracks or splits in the molded rubber, or with bent or broken bolts due to operation
or storage in severe environments, all should be replaced with equivalent parts.
I. Engine Operation
Inspect and maintain engine condition and operation as recommended in the manuals
supplied by the engine manufacturer.
J. Fuels and Lubricants
Use only the types and grades of fuels and lubricants recommended in the Portable Power
Engine Manufacturer’s Operator and Maintenance Manuals.