Troubleshooting Guide - Bostitch BTMT72393 Manual De Operación Y De Mantenimiento

This section provides a list of the more frequently encountered malfunctions, their cause and corrective
actions.The operator or maintenance personnel can perform some corrective actions, and others may
require the assistance of a qualified Bostitch technician or your dealer.
DEFECTIVE PATTERN
HEAVYTOP OR
BOTTOM PATTERN
SPLIT PATTERN
GUN SPLITTING
SPITTING, IRREQULAR
OR FLUTTERING SPRAY
AIR BACK
PRESSURING
INTO CUP .

TROUBLESHOOTING GUIDE

LIKELY CAUSE
1. Dirty or damaged
air cap
2. Dirty or damaged
fluid tip
Air pressure too high for
material viscosity being sprayed.
1. Dirty or distorted air horn
holes.
2. One of the air horn holes
completely obstructed.
Air getting into paint stream
somewhere.
Example: Same symptoms as a
cup running out paint.
1. Fluid nozzle
cracked or worn
2. Leak at thread
of fluid nozzle
3. Leak at fluid needle
4. Needle packing
worn out
5. Insufficient fluid in cup
6. Vent hole in
container cover clogged
Excessive air blowing back into
cup.
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SUGGESTED REMEDY
1. Rotate air cap 180°. If the
pattern follows the air cap,
the problem is in the air cap.
Clean and inspect the air cap.
If the pattern is not corrected,
replacement is necessary.
2. If pattern doesn't follow the
air cap, the problem is with
the fluid tip. Clean and
inspect the tip for dried paint,
dirt or damage. If the pattern
is not corrected, replacement
is necessary.
1. Reduce air pressure.
2.Turn pattern control knob
clockwise to decrease fan
width.Turn fluid needle
adjusting nut counterclockwise
to increase fluid flow.
1. Rotate air cap 180°. If the
pattern follows the air cap,
the problem is in the air cap.
2. Clean and inspect the horn
holes. If the horn holes are
distorted, replacement is
necessary.
1. Check and tighten fluid needle
packing nut.
2.Tighten fluid tip.
3. Check fluid tip seat for
damage.
4. Check for poor gun to cup
seating.
5. Check that cup is correctly
fastened on the gun.
1.Tighten or replace
2.Tighten fluid nozzle
3.Tighten compression nut
assembly or replace needle
packing
4. Replace packing
5. Fill cup with fluid
6. Clean out
1. Tighten fluid tip.
2. Check fluid tip seat.
3. Check for damaged fluid seat
on tip or seat on gun head.