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Hitachi SRL Series Instruction Manual page 31

Oilfree scroll compressor
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Maintenance and Inspection (continued)
● V-belt Inspection
Verify that there is no abnormal noise during operation. Loose V-belts can slip creating noise and may
lead to damage to the air compressor.
※ Contact the local Hitachi distributor if V-belt adjustment is required.
● Intake Air Filter Replacement
Replace the intake air filter every 2,500 hours or every year. Failure to replace the intake air filter each
year may cause compressed air reduction, excessive temperature rise, excessive vibration and sound
and/or damage to the air compressor.
● Make sure that oil and dust do not adhere to the V-belt as they will cause slippage, excessive noise
and/or damage to the air compressor.
● Wear the proper eye or body protection when servicing the air compressor to prevent inhaling harmful
particles, such as dust.
5,000 Hours and/or 2 years Maintenance and Inspection Proceedures
● Rubber Hose Replacement
Replace the rubber hose every 5,000 hours or 2 years. Contact the local Hitachi distributor for
replacement.
10,000 Hours and/or 4 Years Maintenance and Inspection Procedures ・・・・ 122PSIG Model
5,000 Hours and/or 2 Years Maintenance and Inspection Procedures ・・・・・ 145PSIG Model
It is recommended to call the local Hitachi distributor for these maintenance and inspection items.
During this service, replace the following parts:
(1) Tip seal
Wear of the tip seal obstructs the appropriate amount of compression and causes excessive
temperature rise, etc. It can lead to a temperature error「E.TP.」to show on the display.
(2) Grease the scroll bearing
Over time the grease in the scroll bearing deteriorates and requires replacement, if the bearing is not
cleaned and re-greased at the 10,000 or 5,000 hour service requirement, serious damage to the air
compressor may occur. If the scroll does not rotate smoothly and/or a large amount of grease leaks
from the bearing contact the local Hitachi distributor immediately.
(3) Check valve
The seating section and valve body of the check valve will wear over time, causing a malfunction to the
check valve and damage to the air compressor.
(4) Ventilating Fan, Electromagnetic Contactor and V-belt.
【122PSIG Model】
● Four (4) years or 10,000 hours is the recommended replacement period during normal operation.
Do not operate longer than 10,000 hours without replacing these components, as they will cause
damage to the air compressor and/or accidents.
【145PSIG Model】
● Two (2) years or 5,000 hours is the recommended replacement period during normal operation.
Do not operate longer than 5,000 hours without replacing these components, as they will cause
damage to the air compressor and/or accidents.
CAUTION
WARNING
27

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