26 | English
1 609 929 L54 | (18.2.08) Bosch Power Tools
Spray material runs off
after coating
Too much spray material applied Turning the thumbwheel 15 in
direction –
Clearance to target area too close Increase spray distance
Viscosity of spray material too low Add original spray material
Spray material applied too often over
same spot
Remove spray material; reduce
number of spray paths over same
spot
Atomisation too course
Spraying capacity too high Turning the thumbwheel 15 in
direction –
Nozzle 20 soiled Clean nozzle
Too little pressure build-up in con-
tainer 11
Screw container firmly against
spray gun
Spray material too viscous Thin down the spray material by
10% again and carry out a test-
spray run
Air filter heavily soiled Changing the Air Filter
Too much fog of coating
material
Too much spray material applied Turning the thumbwheel 15 in
direction –
Clearance to spray surface too large Reduce spray distance
Spray jet pulsates
Not enough spray material in con-
tainer
Refill spray material
Venting hole on suction tube 10
clogged
Clean suction tube and hole
Air filter heavily soiled Changing the Air Filter
Spray material too viscous Thin down the spray material by
10% again and carry out a test-
spray run
Spray material drips
from the nozzle
Build-up of spray material on nozzle
20 and air cap 13
Clean nozzle and air cap
Nozzle 20 worn Replace nozzle
Nozzle 20 loose Tighten union nut 14
No spray material
emerges from the
nozzle
Nozzle 20 clogged Clean nozzle
Suction tube 10 clogged Clean suction tube
Venting hole on suction tube 10
clogged
Clean suction tube and hole
Suction tube 10 loose Insert suction tube properly
No pressure build-up in container 11 Screw container firmly against
spray gun
Spray material too viscous Thin down the spray material by
10% again and carry out a test-
spray run
Problem Cause Corrective Measure
OBJ_BUCH-670-001.book Page 26 Monday, February 18, 2008 2:16 PM
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