Pall UR329 Serie Notice D'entretien page 4

UR329
R E T U R N L I N E F I LT E R S
7 Filter element servicing
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.
Servicing must not be carried out when a potentially explosive atmosphere
is present.
CAUTION:
Filter elements should be replaced upon indication or
at specified intervals, six months maximum. Failure to
change the element will cause the filter to go on bypass.
Refer to Service Parts List (Section 10) for part numbers for applicable
replacement element series. Remove and replace element as follows:
7.1 Open vent plug one and one half turns on off-line side. Open
commuter valve to ensure off-line side is full of oil. When bubble
free fluid isues from port, torque tighten plug to 12 LBft (16 Nm).
Lift latching pin and shift change over valve handle (9) 180° to bring
off-line housing on-line. Engage latching pin to prevent accidental
handle movement. Close the commuter valve.
NOTE: Change-over valve handle indicates the filter housing on stream.
7.2 The off-line housing, now isolated from the system by the
change-over valve, is depressurised by slowly venting through the
vent plug (7). Open drain plug (7b) and drain fluid into a suitable
container. Discard fluid in accordance with local Health and Safety
regulations. Close drain plug (7b) and torque tighten to 12 ft/lb
or 16 Nm.
NOTE: During element replacement some small internal leakage may be noted
from the on-line filter housing.
7.3 Unscrew and remove cover (3) from tube (2) counter-clockwise
when viewed from above. It way be necessaryto use a 1" socket
wrench on the hexagon on the cover (3) to loosen the cover initially.
WARNING:
DO NOT ATTEMPT TO CLEAN OR RE-USE THE ELEMENT.
Remove filter element (8), if already fitted, and carefully inspect the
interior surface (flow through the element is in-to-out) for visible
contamination. Normally no dirt should show, but visible dirt or
particles can be an early warning of system component failure.
Discard both the filter element and its O-ring. The filter element is
NOT CLEANABLE. Any attempt to clean the filter can cause
degredation of the filter medium and allow contaminated fluid to
pass through the filter element
7.4 DO NOT run the system without a filter element installed. Check
that the O-ring (4) between the cover (3) and tube (2) is not
damaged. Use the replacement filter as indicated by the part
number on the element endcap.
WARNING:
FAILURE TO REPLACE DAMAGED PARTS IN THE FILTER
ASSEMBLY CAN CAUSE COMPONENTS IN THE
HYDRAULIC SYSTEM TO FAIL OR DEGRADE IN THEIR
PERFORMANCE.
Lubricate element O-ring with clean system fluid. Reinstall
element in the shell assembly. Lightly lubricate cover-to-head
(as applicable) O-ring with clean system fluid and reassemble the
housing until thread bottoms. Torque tighten to
10-14 LBft (13-19 Nm).
7.5 O-ring sealing is not improved by over tightening.
WARNING:
DO NOT USE PIPE WRENCH, HAMMER OR ANY
SIMILAR TOOL TO TIGHTEN COVER.
UR329 Series
s e r v i c e i n s t r u c t i o n s
7.6 Open housing vent plug (7) on off-line side. Open commuter valve
to ensure off-line side is full of oil. When bubble free fluid isues
from port, torque tighten plug to 12 LBft (16 Nm). Close the
commuter valve. Filter housing with new element is now ready for
on-line service when required.
7.7 After element change ENSURE VISUAL DIFFERENTIAL
PRESSURE WARNING DEVICE IS RESET BY PUSHING IN THE
BUTTON; electrical devices are reset automatically. When system
reaches normal operating temperature, check that electrical
switch has not actuated and/or that visual warning button remains
depressed. If visual indicator rises due to a cold start condition,
reset again as per Section 6.
8 Fluid sampling
Optimum sampling to verify fluid condition can be achieved by the use
of sampling adaptors installed in place of or in combination with the
differential pressure device. This provides up and downstream 1/4-inch
BSP parallel thread ports to be used for sampling. For more information
consult Pall or your local Pall distributor. Pall offers a fluid contamination
analysis service - consult the Pall sales office.
9 Warranty, Limitation of Liability
and Remedies
THERE IS NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR
ANY PARTICULAR PURPOSE WITH RESPECT TO ANY OF THE
PRODUCTS, NOR IS THERE ANY OTHER WARRANTY EXPRESS OR
IMPLIED, EXCEPT AS PROVIDED FOR HEREIN.
For a period of twelve months from the date of delivery from Seller or
three thousand hours of use, whichever occurs first (the "Warranty
Period", Seller warrants that products manufactured by Seller when
properly installed and maintained, and operated at ratings, specifications
and design conditions, will be free from defects in material and
workmanship. By way of explanation and not limitation, the Seller does
not warrant the service life of the filter element as this is beyond the
Seller's control and depends upon the condition of the system into which
the filter is installed.
Seller's liability under any warranty is limited solely (in Seller's discretion)
to replacing (FOB original ship point), repairing or issuing credit for
products that become defective during the Warranty Period. Purchaser
shall notify Seller promptly in writing of any claims and provide Seller with
an opportunity to inspect and test the product claimed to be defective.
Buyer shall provide Seller with a copy of the original invoice for the
product, and prepay all freight charges to return any products to Seller's
factory, or other facility designated by Seller. All claims must be
accompanied by full particulars, including system operating conditions,
if applicable.
Seller shall not be liable for any product altered outside of the Seller's
factory except by Seller or Seller's authorized distributor, and then, as to
the latter, only for products which have been assembled by the distributor
in accordance with Seller's written instructions. Nor shall Seller be liable
for a product subjected to misuse, abuse, improper installation,
application, operation, maintenance or repair, alteration, accident or
negligence in use, storage transportation or handling.
In no event will Seller be liable for any damages, incidental, consequential
or otherwise, whether arising out of or in connection with the
manufacture, packaging, delivery, storage, use, misuse, or non use of any
of its products or any other cause whatsoever.
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