(2) If the extension cord does not conform to the
specifications given on page 7 replace with an
extension cord such as that shown on page 7. If
the capacity of the power supply is insufficient,
increase the power supply capacity to remove the
cause of a flow of excessive current (over-current).
(3) Wait approximately 5 minutes, then press the
reset switch of the thermal protector (Fig. 9).
(4) Open the drain cock and confirm that the pressure
gauge (A) indicates 0 PSI (0 bar) (Refer to Fig. 7
and Fig. 8).
(5) Follow steps (2) to (4) in 1. Start up on page 12
and restart. If the motor still stops during
operation, please contact the service center.
Reset switch of thermal protector
Disconnect the compressor from the
power source and remove the
compressed air from the air tank
before performing the maintenance
operations. Allow the compressor to
cool before performing the
1. Cleaning the intake filter
Remove the intake filter (Refer to Fig. 1) every 50
hours or once a week and clean the inside of the
intake filter and the filter element with compressed air
Never clean filter element with a
flammable liquid or solvent.
Do not operate without the intake
NOTE: Replace the filter element when it becomes dirty.
2. Draining tank
Drain tank daily or after 4 hours of use. Open drain
fitting and tilt compressor to empty accumulated
water (Refer to Fig. 8).
3. Oil change-oil topping off
(1) Within the first 50 hours of operation, completely
replace the oil of the pumping element. Unfasten
the oil drain cap on the casing cover, drain all the
oil, and screw the cap back on (Refer to Fig. 1 and
Pour oil into the hole of the dipstick.
To the level indicated on the dipstick (Refer to Fig.
For oil replacement, follow the table below.
SAE 5W50 SYNTHETIC OIL
For both summer and winter use
SAE 10W40 MULTI-GRADED OIL
For warm weather use only
(2) Check the oil level of the pumping element every
50 hours or once a week.
(3) Change the oil every 300 working hours or every 6
SERVICE AND REPAIRS
All quality compressors will eventually require servicing
or replacement of parts because of wear from normal use.
To assure that only authorized replacement parts will be
used, all service and repairs must be performed by a
HITACHI AUTHORIZED SERVICE CENTER, ONLY.
NOTE: Specifications are subject to change without any
obligation on the part of the HITACHI.
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Overfilling with oil will cause
premature compressor failure. Do not