4
RETURN LINE FILTERS
s e r v i c e
i n s t r u c t i o n s
clean and dry. Lightly lubricate the centre post threads, O-ring
seal and cover assembly seals with clean system fluid. Hand
tighten cover until cover assembly and tube are in contact.
Apply suitable torque wrench to outer hex nut on cover and
tighten to 30 Nm (22 ft lb). O-ring sealing is not improved by
over tightening.
7.6
Open housing vent plug (10). Open commuter valve (16) (three
full turns max). Slowly open commuter valve to equalise the
pressure between the two sides of the housing. Close vent
plug when bubble free fluid issues from it. Close commuter
valve and check for leaks. Filter housing is now ready for
changeover when required. Close commuter valve (16).
NOTE: For UR640, UR660 and UR680 units, the above applies
to each housing having elements replaced.
7.8
After element change ENSURE VISUAL DIFFERENTIAL
PRESSURE WARNING DEVICE IS RESET; 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.
Refer to Service Parts List (Section 10) for item numbers for
applicable replacement element series. Remove and replace element
as follows:
7.1
Open commuter valve (16) (three full turns max). Crack open
off-line vent plug. Slowly open commuter valve to equalise
pressure in the two sides of the housing. Close vent plug when
bubble-free fluid issues from it. Close commuter valve (16).
NOTE: Change-over valve handle indicates the filter housing on stream.
7.2
Each off-line housing, now isolated from the system by the
change-over valve, is depressurised by slowly venting through the
vent plug (10). Open drain plug (11) and drain fluid into a suitable
container. Discard fluid in accordance with local Health and Safety
regulations. Close drain plug (11) 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
Manually unscrew cover and remove filter cover assembly (5)
from tube (2). Remove element (8), if already fitted, and carefully
inspect the surface for significant visible contamination.
Normally no dirt should show but visible dirt or particles from
the filter tube (2) interior and filter cover assembly (5) can be
an early warning of system component breakdown and can
indicate potential failure. Discard both the element and its
O-rings in accordance with local Health and Safety Procedures.
The filter element is NOT CLEANABLE. Any attempt to clean
the filter can cause degradation of the filter medium and allow
contaminated fluid to pass through the filter.
7.4
Inspect filter cover assembly (5) and bypass valves for possible
damage or malfunction. Replace filter cover assembly if
damage is observed. Remove any accumulated dirt from the
filter tube interior and cover assembly being careful to prevent
contaminant from entering the outlet and flowing downstream.
DO NOT run the system without a filter element (8) installed.
Check the O-rings (6) on the cover assembly (5) and centre post
(3) are not damaged. Use the correct replacement filter element
(8) part number called for on assembly nameplate.
7.5
Lubricate element O-ring seals with clean system fluid and
push filter element (8) straight over the housing centre post.
Ensure the cover assembly (5) and centre post (3) threads are
WARNING:
DO NOT ATTEMPT TO CLEAN OR RE-USE THE
ELEMENT.
ONLY USE GENUINE PALL REPLACEMENT FILTER
ELEMENTS. USE OF SUBSTITUTE ELEMENTS MAY
INVALIDATE PRODUCT WARRANTY.
WARNING:
FAILURE TO REPLACE DAMAGED PARTS IN THE
FILTER ASSEMBLY CAN CAUSE COMPONENTS IN
THE HYDRAULIC SYSTEM TO FAIL OR DEGRADE IN
THEIR PERFORMANCE.
WARNING:
DO NOT USE PIPE WRENCH, HAMMER OR ANY
SIMILAR TOOL TO TIGHTEN COVER.
WARNING:
FAILURE TO CLOSE THE COMMUTER VALVE AND
TO DEPRESSURISE THE FILTER HOUSING BEFORE
SERVICING THE FILTER ELEMENT COULD RESULT
IN EXPLOSIVE LOSS OF FLUID, DAMAGE TO
EQUIPMENT AND POSSIBLE PERSONNEL INJURY.
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.
UR620/40/60/80
UR620/40/60/80 Series
