Pro 501st Airless Paint Sprayer - Graco Inc.

Operation
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 9.
How to Use the Pressure Control
The pressure control controls the motor operation so
the sprayer maintains constant fluid pressure at the
pump outlet. Turn the pressure control knob fully
counterclockwise to obtain the minimum setting. Turn
the knob clockwise to increase pressure. See Fig. 4.
The tip guard alerts you to the risk and helps prevent
placing any part of the body close to the spray tip. The
tip guard also adjusts the vertical or horizontal spray
pattern. See page 10. The tip guard holds a reversing
spray tip. The tip is in the spraying position when the
tip handle points forward. See Fig. 5.
Clean the front of the tip frequently during the day’s
operation. First, relieve the pressure.
–
+
Tip handle shown in
spraying position.
Turn handle 180,
trigger gun to clear clog
Fig. 5
Fig. 4
02824A
How to Remove a Tip Clog
How to Use the RAC IV Tip Guard
WARNING
To reduce the risk of serious injury from fluid injection:
Never operate the spray gun with the tip guard
removed.
Do not hold your hand, body, or a rag in front of the
spray tip when cleaning or checking a clogged tip.
Always point the gun toward the ground or into a
pail when checking to see if the tip is clear.
Do not try to “blow back” paint; this is not and air
spray sprayer.
1. Release the gun trigger. Lock the safety latch.
Rotate the RAC IV tip handle 180. See Fig. 5.
2. Unlock the safety latch. Trigger the gun into a pail
or onto the ground to remove the clog.
3. Lock the safety latch. Rotate the tip handle to the
spraying position.
4. If the tip is still clogged, lock the safety latch, shut
off and unplug the sprayer, and open the pressure
drain valve to relieve pressure. Clean the spray tip
as shown in manual 307–848, supplied.