Maintenance Under Special Environmental Conditions - Hitachi 120-3 class Operator's Manual

Hydraulic excavator
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MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS

MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS
Operating Conditions
Muddy Soil, Rainy or
Snowy Weather
Near the Ocean
Dusty
Atmosphere
Rocky Ground
Freezing Weather
Falling Stones
Before Operation:
Check the tightness of plug and all drain cocks.
After Operation:
Clean the machine and check for cracks, damaged, loose or missing bolts
and nuts. Lubricate all necessary parts without delay.
Before Operation:
Check tightness of plugs and all drain cocks.
After Operation:
Thoroughly clean the machine with fresh water to wash off salt. Service elec-
trical equipment often to prevent corrosion.
Air Cleaner:
Clean the element regularly at shorter service intervals.
Radiator:
Clean the oil cooler screen to prevent clogging of the radiator core.
Fuel System:
Clean the filter element and strainer regularly at shorter service intervals.
Electrical Equipment: Clean them regularly, in particular, the commutator surface of the alternator
and starter.
Tracks:
Carefully operate while checking for cracks, damage and loose bolts and
nuts. Loosen the tracks a little more than usual.
Front Attachment: Standard attachment may be damaged when digging rocky ground. Rein-
force the bucket before using it, or use a heavy duty bucket.
Fuel:
Use high quality fuel suitable for low temperature.
Lubricant:
Use high quality low viscosity hydraulic oil and engine oil.
Engine Coolant:
Be sure to use antifreeze.
Battery:
Fully charge the batteries regularly at shorter service intervals. If not fully
charged, electrolyte may freeze.
Tracks:
Keep the track clean. Park the machine on a hard surface to prevent the
tracks from freezing to the ground.
Cab:
Provide a cab guard to protect the machine from falling stones when neces-
sary.
Precautions for Maintenance
9-1

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