Cleaning Pump
Rollers and Platen
It is extremely
important that the parts that come into contact with the pump tubes are clean
and free from oil: otherwise, the pump tubes will wear out rapidly.
The pump rollers
and platen should be cleaned when the pump tubes are replaced (usually every 200 hours):
·
After
removing the worn pump tubes, remove the two side rails.
·
Clean
each of the 8 pump rollers (not the chains) and the bottom of the pump platen
thoroughly, using a clean lint-free cloth or paper towel moistened with
isopropyl alcohol or ethanol.
To rotate the pump, make sure that the red switch is in
position ‘RUN’. Then take the pump
platen and hold the corner with the magnet in front of the safety reed switch.
As long as the magnet is there, the pump will rotate.
Cleaning and
Lubricating the Side Rails
The two side
rails should be cleaned and lubricated when the pump tubes are replaced
(usually every 200 hours).
·
After
removing the worn pump tubes, remove the tube holders and the two side rails.
·
Wipe
the side rails clean, using a clean lint-free cloth.
·
Lightly
lubricate the bottom of the side rails with a thin film of semi-fluid lubricant (P/N 590-0161-01).
·
Position
the side rails on the holding pins. The
side with the slot must be at the exit side of the pump. Number the tube holders. Remember to check reagent absorbance and
sensitivity after changing pump tubes.
Lubricating
the Oil Pads
There are two oil
pads that are used to lubricate the chain rollers. They should be lubricated when the pump tubes
are replaced.
Add 2 drops of all-purpose oil (P/N
538+9000-01) to each pad.
The oil pads
should be replaced every two years (or earlier if they show visual signs of
wear).
Lubricating
Roller and Chain Bearings
The pump roller
and chain bearings should be lubricated when the pump tubes are replaced.
·
After
removing the worn pump tubes, put 1 drop
of all-purpose oil into each of the two oil holes between the chain rollers,
near the oil pads.
·
Put 1 drop of the same oil on each end of
each pump roller and chain interface.
Rotate rollers
and wipe off excess oil with a lint-free cloth.
Make sure that there is no oil on the pump rollers and the bottom on the
pump platen.
Checking the
Platen Pressure
If the pump tubes
wear out too quickly for if the platen does not unlatch when you turn it
backwards, the platen pressure may need adjustment.
To check the
platen pressure:
·
Lift
the cover plate until it forms a 45-degree angle with the top of the
platen. Do not unlatch the platen.
·
Take a
spare side rail and try to slide it under each of the four sealed screws on top
of the pump platen. These screws are
spring-loaded and regulate the platen pressure. Note that the side rails must
be installed for this test. If you do
not have a spare side rail, take another object that has a height of
approximately 1 mm (e.g.:
a dime).
If the side rail
does not fit under a screw, or if there is space between the top of the side
rail and the bottom of the screw, the screw needs to be re-adjusted.
Warning: Re-adjustment of the platen pressure should be
performed by trained service personnel only.
Do not loosen the sealed screws on the pump platen, as they are
spring-loaded.