Periodic Maintenance; Periodic Maintenance For Compressor - Hitachi HISCREW 2000 Series Instruction Manual

8. PERIODIC MAINTENANCE

Before Maintenance work, read "To Use in Safety" (
Be sure to turn the POWER OFF when check or maintenance is carried out. If not, such work may
cause serious accident like electric shock.
When part of the unit needs to be disassembled or removed, be sure to release its internal pressure to
the level of ambient air pressure. Residual high pressure inside the unit will blow out of it when a
bolt, pipe or other part is removed, and may cause unexpected accident.
IMPORTANT
(1) ○ mark on the maintenance standard chart at pages 45 through 46 means an item which the user can carry out.
(2) ● mark means that you ask your dealer or Hitachi's Service Station to do.
(3) Except for the case as specifically stated otherwise, maintenance time means consecutive maintenance schedule, e.g., once
every year stands for another maintenance for the next year, and after next year, and so forth.
(4) Operation Record Logbook is quite important for periodic maintenance as well as for finding out of cause for repair promptly in
case of Shut-Down. It is recommended to record the Logbook which is attached to the end of this manual.

8.1 Periodic Maintenance for Compressor

Typical maintenance standards is given at pages
45 through 46.
(1) The standards illustrates typical maintenance
standards. It may require shorter period for
the next maintenance depending on the condi-
tion such as ambient environment and use
condition of the unit.
(2) This maintenance standards does not mean
warranty period of the unit.
(3) Replace the part if it shows fault during in-
spection.
(4) Carry out a periodic inspection once every year
to prevent the unit from possible accident.
(5) Use genuine parts for replacement.
44
CAUTION
p. 2) again carefully.
Standard maintenance interval has five varia-
tions, namely monthly, yearly, at every 2 years,
every 4 years, and every 8 years. Each of these
intervals also has two different types of applica-
tion depending on the run hour of the unit, which
are for 3,000h and for 6,000h. Choose your suit-
able maintenance interval according to the run
hour of your unit.
Yearly Run Hour
Less than 6,000 hours
Less than 3,000 hours
IMPORTANT
(1) If Yearly Run Hour exceeds 6,000, carry out main-
tenance based on the following Run Hour:
Monthly: Every 500 hours.
Semiyearly: Every 3,000 hours.
Yearly: Every 6,000 hours.
Biyearly: 12,000 hours.
(2) Under the condition that Run Hour is less than
3,000 and the unit had not been used for long time
and its operation under low load, follow the stan-
dards of maintenance (A) of Run Hour 6,000.
Maintenance Standards Table
Maintenance Standards (A)
Maintenance Standards (B)