Installation and servicing manual
Air Oil Coolers, LOC
19
Parker Hannifin Corporation
Hydraulics Group
Catalogue HY10-6003-UM/EU
During servicing the external surfaces of the filter assembly must
be cleaned to remove any dust deposits. Servicing must be
conducted using suitable tools that do not present a hazard. If
external leakage is noted, replace O-ring at leak. If leakage per-
sists, check sealing surfaces for scratches or cracks; replace any
defective parts.
A dirty system can quickly plug a new filter element. It may require
one or two initial element changes to stabilize element life. If ele-
ment life is short or differential pressure is excessive, filter may be
undersized; contact your local Parker office.
Pressure drop indicators
A pressure drop indicator operates by sensing the differential
pressure between port upstream and downstream of the filter
element. The pressure drop indicator operates independent from
the bypass valve and is intended to react before the valve opens.
This implies that there is time available to change filter cartridge
before the bypass valve opens and lets unfiltered oil through, and
this also maximizes the utilization time of the filter element.
If the indis ignored and the contamination persists, the bypass
valve will open in the filter unit when the pressure drop across the
filter element reaches 3,5 bar. The system will then operate as a
cooling system without oil cleaning.
Indicator type D
If visual indicator D is fitted and actuates ‘cold start’ (red button
extends 5 mm), reset by depressing the button when the normal
operating temperature is reached. If indicatoractuates after reset-
ting, replace filter element.
Indicator type P
Visual indicator type P has thermal lockout , i.e. no signal when
the temperature is below 0 °C; signal when temperature is above
+29 °C. This indicator has manual reset.
Indicator type M
The electrical pressure drop indicator M has an automatic reset
and connection according to DIN 43650, ISO4400 (Hirschmann)
and is moisture-proof according to IP65. Use of both positive
indication (green light) and negative indication (red light for dirty
element) is recommended to effectively monitor filter element life.
If an electrical pressure drop indicator type M is used and actuates
(e.g. red light comes on) during cold tart, continue operating until
the signal (red light) goes out as system warms to normal opera-
ting temperature. This feature can be used as ‘warm up’ indication
in operating procedures. If the warning signal (red light) remains or
appears when system is warm, replace the filter element.
Indicator type U
The electrical pressure drop indicator type U is equipped with a
2-pole AMP contact.
Filter element replacement
1. Turn off the system and shut-off valve if any.
2. Make sure the system is depressurized.
3. Open the vent plug on the filter unit cover approximately two
turns.
4. Unscrew and remove cover counter clockwise when viewed
from above.
5. Remove the filter element. Discard both the filter element and
its O-ring. The filter element is not cleanable. Any attempt to
clean the element can cause degradation of the filter medium
and allow contaminated oil to pass through the filter element.
Used filter elements should be collected according to specific
industrial waste regulations of each country.
6. Install a new filter element. Make sure this is fitted with an
O-ring in the bottom.
7. Install a new O-ring in the filter unit cover and screw on the
cover.
8. Start the pump motor with vent plug open approximately two
turns.
9. Tighten the vent plug when only oil bleeds through.
During start-up the pressure drop indicator could actuate
because of high viscosity. Reset the indicator. Do not run the
system without a filter element installed.
After element change ensure pressure drop indicator is reset by
pushing in the red button. The electrical indicator will reset auto-
matically.
When system reaches normal operating temperature, check that
the electrical indicator has not actuated and/or the visual warning
button has remained depressed. If visual indicator rises due to
a cold start condition, reset again as per section Pressure drop
indicator.
Parker do not warrant the service life of the filter element as this
is beyond our control and depends upon the condition of the
system into which the filter unit is installed.
Note!
The FX3 filter unit is equipped with an element extraction
mechanism to facilitate element removal. While removing the cap,
tabs on the element end cap lock into hooks in the cap and the
element is automatically pulled from the nipple.
Important
Do not attempt to clean or re-use the filter element.
Filter elements should be replaced upon indication or at specified
intervals, six months maximum.
Maintenance