Technical data

32
GM 4100AC
OPERATING MANUAL
EDITION 12/2008
PART NO. DOC394821
Functional fault Cause Remedy See in chapter
Insuffi cient material
discharge
Nozzle too small Select larger nozzle 9
Material pressure to low Increase material pressure
Filter of gun or high-
pressure fi lter at pump
clogged
Clean or replace fi lter 6.1
Nozzle is clogged Nozzle cleaning 5.4.5
Valve stem defective Replace valve rod 6.4
Poor spray pattern Wrongly adjusted
atomizing air
Readjust the atomizing air 5.4.1
Nozzle to large Select smaller nozzle 9
Material pressure to low Increase pressure at pump
Material viscosity to
high
Dilute spraying material acc. to
manufacturer‘s instructions
Partial nozzle blockage Nozzle cleaning 5.4.5
Wrongly adjusted
atomizing air
Readjust the atomizing air 5.4.1
Air cap faulty (blocked
holes, damaged seal)
Clean or replace air cap 5.4.5
Wrong air cap type Replace as required air cap
(solvent / water based)
4.2.4
Valve rod leaks (Paint- or
air path)
Paint seal (packing)
damaged or worn, valve
stem damaged
Adjust or replace packing or
replace valve stem complete
6.4
Air valve seals damaged Replace air valve seals 6.4
Pretension to low Re tighten sealing screw
Spray gun will not shut-off
correctly
Worn valveseat / valve
ball
Replace parts 6.4
Packing-screw too tight,
or packing stuck with
dried paint
Replace the seals 6.4
7 TROUBLE SHOOTING AND SOLUTION