Shutdown And Care - Graco EM 490 Instructions-Parts List Manual

4. Cleaning a Clogged Tip
WARNING
jection, use extreme caution when cleaning or
To
reduce'the risk of serious bodily injury from in-
changing spray tips. If the spray tip clogs while
spraying, engage the gun safety latch immediate-
ly, then follow the procedure in Steps
4a-4e.
below.
NEVER wipe off buildup around the spray tip until
pressure is fully relieved and the gun safety latch is
engaged.
a. Clean the front of the tip frequently during daily
operation. firsf, follow the Pressure Relief
Procedure Warning on page
10.
Then use a
solvent-soaked brush to keep fluid from
building up and clogging the tip.
b. If the spray tip does clog, release the gun t r i g
ger, end engage the gun safety.
c. I f
using the RAC
111 Spray Tip Kit, rotate the
RAC 111 handle 180'. See Fig 7. Disengage the
waste container. Engage the gun safety again.
gun safety, and trigger the gun into agrounded
I f uslng a spray tip kit which
Is
not
self-
Return the handle to the original position.
cleanlng,
VERY SLOWLY
loosen the tip guard
retaining nut or hose end coupling, and relieve
pressure gradually, then loosen completely.
Clear the tip or hose, then reassemble.
d. Disengage the gun safety, and resume spraying.
e. I f the tip is stlil clogged, engage the gun safe-
the drain valvefpressure relief valve to relieve
ty, shutoff and unplug the sprayer, and open
f. Instructions for cleaning the RAC 111 Spray Tip
pressure. Remove the spray tip and clean it.
are given in the instructions supplied with kit.
SHUTDOWN AND CARE
1. Check the packing nut/wat-cup daily. First
follow the Pressure Relief Procedure Warning
on page 10. Be sure the wet-cup is 1/3 full of TSL
at all times to help prevent fluid buildup on the
piston rod and premature wear of packings. The
packing nut should be tight enough to stop
leakage, but no tighter. Overtightening may cause
binding and excessive packing wear:Use
a
screw-
driver and light hammer to adjust the nut. See
Fig 8.
2. Clean the fluid filter often and whenever the
sprayer is stored. First follow the Pressure Relief
307-273, supplied, for the cleaning procedure.
Procedure Warning on page 10. Refer to manual
3.
Flush the sprayer at the end of each work day
and fill
it
with mineral spirits to help prevent pump
corrosion end freezing. See "Flushing Guidelines"
on page 12.
CAUTION
.'night to: (1) prevent pump corrosion; (21 prevent
Never leave water or any paint in the sprayer over-
the fluid from freezing in the pump and pressure
control which can cause loss of pressure, stalling
or serious sprayer damage. Always use mineral
spirits for the final flush, follow the
Pressure
leave the mineral spirits in the sprayer.
Rellef Procedure Warning on page 10, and
Fig
7
Fig 8
4. For very short shutoff parlods, leave the suction
tube in the paint, follow the Pressure Rellef Pro-
tip.
cedure Warning on page
10,
and clean the spray
5. Coil the hose and hang
it
on the hose rack when
storing it, even for overnight, to help protect the
hose from kinking, abrasion, coupling damage, etc.
6. For the low-profile cart. secure the suction hose
assembly with the brackets on the side of the cart.
page 3 for information on the hazard of using
Refer to the warning section
HOSE SAFETY on
damaged hoses.
307-735
11