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9. MAINTAINING THE DSP
● Before you service the DSP, carefully read pages 2 through 5, Chapter 1 “SAFETY.”
● Before you service the DSP, disconnect the power; otherwise you may receive an electric shock.
● Before you remove or disassemble a bolt, pipe, or any other part of the DSP, stop it, disconnect the
power, and make sure that the internal pressure has dropped to an atmospheric pressure. Otherwise
the compressed air may gush out of the DSP.
Overhauling consists changing the existing air end
with a new replacement air end.
Overhaul the DSP at 6 yearly.
9.1 Air Compressor Maintenance
① The DSP standard maintenance schedules are listed
in pages 71 through 74. Periodic maintenance inter-
vals in these schedules mean daily, monthly, halfyear-
ly, yearly, two-yearly, 4-yearly, and 6-yearly.
They are based on the normal environmental and
operating conditions. If your DSP is in sever environ-
mental and operating conditions, service it at more
frequent intervals.
Standard maintenance schedule (A) is based on the
8,000 operating hours per year while (B) 4,000 hours.
Select either (A) or (B) according to your own operat-
ing hours per year. If your DSP is in sever (high-
humid, dusty, etc.) conditions, however, always select
(A) regardless of your operating hours.
② Any of the maintenance intervals is not a warranty
period.
③ If the part you inspected is abnormal, faulty, or dam-
aged, replace it.
④ Do not neglect a yearly maintenance schedule as it is
most important from a preventive maintenance stand-
point.
⑤ Use HITACHI genuine parts for replacement.
(1) Daily fill the OPERATION RECORD LOGBOOK
(
p. 88 - 89) and check the operating data and
conditions.
If the data deviates from the benchmark in the
logbook, service the DSP.
(2) Regularly drain the condensate and observe the other
daily operating instructions; see pages 6 through 7.
CAUTION
1
Daily Operation Control
2
Maintenance at Periodic Intervals
3
Overhauling
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