Hitachi EC 189 - Manual (Page 13)

— 13 —
English
WARNING: 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 maintenance operations.
Read the instruction manual before performing
maintenance. The following procedures must be
performed when stopping this compressor for
maintenance or service.
(1) Turn off this compressor.
(2) Disconnect power cord from main power supply.
(3) Open all drains.
(4) Wait for this compressor to cool down before
starting service.
1. Cleaning the filter element
This filter is designed to clean air coming into the
pump (Fig. 9). To ensure the pump continually
receives a clean, cool, dry air supply this filter must
always be clean and ventilation opening must always
be free from obstructions.
WARNING: Never clean filter element with a
flammable liquid or solvent.
CAUTION: Do not operate without the filter element.
Fig. 9
NOTE: Replace the filter element when it becomes dirty.
2. Draining air tank:
Gradually open the drain valve, and drain out the air
in the air tank. (Fig. 7)
Close tightly when drained.
3. Oil change-oil topping off
CAUTION: Overfilling with oil will cause premature
compressor failure. Do not overfill.
(1) Within the first 50 hours of operation, completely
replace the oil of the pumping element. Unfasten
the pump oil plug on the casing cover, drain all
the oil, and screw the plug back on (Refer to Fig. 1
and Fig. 10).
Fig. 10
Pour oil into the hole of the pump oil dipstick.
To the level indicated on the pump oil dipstick
(Refer to Fig. 2).
For oil replacement, follow the table below.
OIL TYPE CHART: Refer to page 9.
(2) Check the oil level of the pumping element daily.
(3) Change the oil every 200 working hours or every
3 months.
4. Belt tension
(1) Checking belt tension
(a) Allow unit to cool.
(b) Remove beltguard.
(c) Push down on belt midway between the two
pulleys.
(d) Belt deflection should be about 1/4 inch.
(e) If belt tension is significantly greater than 1/4
inch, follow adjustment procedure.
(2) Adjusting belt tension
WARNING: Use caution when rolling belt onto
flywheel as fingers can get caught
between the belt and flywheel.
(a) Loosen the nuts on all four motor mounting
bolts.
(b) Turn belt tensioner bolt at the front of the unit
clockwise until 1/4 inch deflection is noticed
between the pulleys.
(c) Tighten nuts on motor mounting bolts.
(d) Replace beltguard.
Pump
Filter housing
(Rear)
Filter
housing
(Front)
Filter element
Pump oil plug
e_ec189_e.p65 11/6/03, 2:23 PM 13