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Troubleshooting
36
3A5385A
Air and Bead System
PROBLEM
CAUSE
SOLUTION
Belts squealing during engine
startup
Compressor belt needs tightening or
replacing
See
Compressor Belt and Hydraulic
Pump Belt
, page 11.
Paint guns not spraying when bead
tank is empty
All of air supplied by air compressor
is rushing out of bead gun nozzles.
Therefore, system air pressure can-
not build enough to trigger guns.
This is normal.
Fill bead tank with beads or turn off air
supply to bead tank.
No system pressure
Compressor bypassing air continu-
ously
1. Make sure silver switch on top of
unloader valve (148) is turned hori-
zontally.
2. Move silver switch on top of unloader
valve (148) up and down. This might
loosen a sticky valve.
3. Replace unloader valve (148).
Beads not dispensing properly
Excessive water or moisture in bead
tank
1. Only pressurize reflective materials
when dispensing. Small air leaks at
gun nozzle or air fittings cause mois-
ture to be pumped continuously into
tank.
2. For areas of extreme humidity an air
dryer may be installed between air
tank and bead tank regulator. Typi-
cally when beads are used continu-
ously, they do not spend enough time
in tank to collect enough moisture to
be a problem. Continuous stencil
painting for long periods of time with
little bead consumption and high
humidity that can cause problems.