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STALL PRESSURE CALIBRATION
WARNING
fluid injection injury or other serious bodily injury which can result
from component rupture, electric shock, fire,
USE EXTREME CAUTION WHEN PERFORMING THIS CALIBRATION PROCEDURE to reduce the risk of a
explosion, or moving parts.
This procedure sets the sprayer 3000 psi (210 bar)
NEVER EXCEED 3000 psi (210 bar) MAXIMUM
MAXIMUMWORKING PRESSURE.Performthispro-
WORKING PRESSURE. Normal operation of the
cedure wheneverthe pressure'control assembly is re-
sprayer at higherpressurescould result in component
sprayer is properly calibrated.
moved and reinstalled or replaced to be sure the rupture,
fire or explosion.
Improper calibration can cause the sprayer to over-
3ooo
psi (210 bar)
WORK,NG PRES-
Use a new50
ft (1
5.2 m) spray hose rated for at least
pressurize and result in component rupture, fire
or ex-
plosion. It may also prevent the sprayer from obtaining high pressure leak or rupture,
SURE. A used, under-rated hose could develop a
the maximum working pressure, resulting in poor
sprayer performance.
NEVER attempt to increase the fluid outlet pressure sembly when the control box cover is removed, to re-
AVOID touching the wire in the pressure control as-
by performing these calibrations in any other way. duce the risk of electric shock.
Service Tools Needed:
NEW 50 tf (15.2 m) 3300 psi (231 bar) flexible, nylon
airless spray hose, Part No. 210-541
0-5000
psi (0-350 bar) fluid-filled pressure gauge,
Part
No. 102-814
-
.
.~ .
5 gallon pail and water
New spray tip, size 0.015''
Mineral spirits
Calibration Setup.
1. Follow the Pressure Relief Procedure Warning on
page 25. Remove the spray hose and gun. Install
a
.new test hose and connect the hose to the sprayer
new0.015"spraytipinthegun.Connecttheguntoa
outlet.
2. Remove the pressure control screws and cover.
Re-
stall the test gauge (W). Place the pump suction tube
move the plug from the top of the fluid filter, and in-
in a 5 gallon pail of clean water.
3. Be sure the gun safety latch is engaged.
4.
Use a 318" ianition wrench to turn the oressure ad-
justment nuy ( S ) counterclockwise
60
full turns.
See Fig 31-2.
5.
With the pressure control knob (6) at the minimum
setting, turn the sprayer switch ON. See Fig 31-2.
THE DISPLACEMENT PUMP SHOULD NOT CYCLE
If itdoes
cyde. shut the sprayer switch OFF, disen-
gage the gun safety latch, trigger the gun into a
grounded waste container until pressure is relieved,
and engage the latch again. Turn the nut (S) a little
further counterclockwise. Turn the sprayer on
again to be sure THE PUMP DOES NOT CYCLE.
6. Slowiyturnlhe pressure control knob (B) clockwise
to the maximum setting and hold it there.
Use a 3/8"
ignition wrench
to
slowly turn the pressure adjust-
ment nut
(S)
clockwise until the test gauge reads
EXACTLY 3000 psi (210 bar).
7.
'The calibration procedure is now completed.
WARNING
Follow the Pressure Relief Procedure Warning on
page 25.
CAUTION
To
prevent pump corrosion, flush the water out of
the pump, hose and gun with mineral
spirits. Be sure
to close the drain valve, first. Use the lowest
pressure necessary to flush. Follow the Pressure
Relief Procedure Warning on page 25. Leave the
mineral spirits in the pump to protect it until you are
ready to spray again.
8
Remove the test gauge assembly and reinstall the
plug. Flush out water with mineral spirits.
Fig
31-1
Fig 31-2
M
307-786
31
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