Graco 918334, Instructions-Parts List Manual

Page: 23 / 86

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Operation
Changing Empty Pails
CAUTION
To help avoid damage to equipment, be sure to
reload the empty supply unit with a full drumpail of
material immediately. Do not allow the supply units
to operate when empty, which would cause a pump
runaway and cause damage to the system.
CAUTION
To help avoid damage to equipment, do not raise
the ram and remove the follower plate from the
empty pail until you are ready to immediately install
the new pail.
CAUTION
Do not
raise the ram and remove the follower
plate from the empty pail unless the supply unit is
at full operating temperature. Pail changes can
only be performed when the system is heated. At-
tempting to change a pail when the supply unit is
cold could result in injury or damage to the equip-
ment.
WARNING
MOVING PARTS HAZARD
To reduce risk of injury or damage to
equipment, take care when adjusting
blow off pressure. Too much pressure
can cause the follower plate to rise very quickly or
burst the drum. Too little pressure can cause the
ram to lift the entire drumpail from the ground.
CAUTION
To help avoid damage to equipment, do not use a
drumpail of material that has been dented or other-
wise damaged; damage to the follower wipers may
result.
WARNING
To reduce risk of injury or damage to
equipment, be sure to tighten the bleed
stick after bleeding the air. Otherwise hot
material will leak out of the opening.
Bursts of material and air will exit the
bleed port! To reduce risk of injury or
damage to equipment, wear eye
protection, gloves and protective clothing
whenever working with this supply
system.
WARNING
Read all warnings and instructions before
attempting this procedure!
When a pail of material is empty, follow this procedure
to load a new pail of material:
NOTE: Change the pail only while the supply unit is
hot.
1. Stop the pump by closing either the bleed-type
master air valve or the fluid dispensing valve.
2. Raise the ram out of the pail:
a. Set the ram UP air regulator to 15 – 20 psi.
b. Move the hand valve lever to the UP position
(Fig. 3 on page 21). At the same time, careful-
ly equalize the pressure in the pail by using the
Follower Blow-off Valve Regulator to cycle the
follower blow-off valve open and closed.
3. With the follower completely out of the pail, re-
move the empty pail.
4. Being careful not to damage the follower wiper,
scrape any material or material build-up from the
follower plate and wiper.
5. Remove the cover from the pail of appropriate
material. Remove any other packing materials
from the pail, exposing the material. Make sure
that there are not any foreign materials on the ma-
terial surface. Place the pail under the raised fol-
lower plate.
NOTE: Whenever pail changes are required, remove
the cover from the pail of new material by
holding it level and lifting it straight up. Tipping
the cover may allow accumulated dirt to spill
into the pail, which may result in damage to
the equipment.