Graco ThermoLazer 200TC Repair Manual page 37

Problem
Screed box burner does
not ignite, does not
remain ignited, or can
not change heat output
Torch does not ignite
Agitator crank handle is
hard to move
™
ControlFlow gate valve
difficult to open
or close
ControlFlow gate valve
leaking
Screed box leaking
Excessive material
buildup when starting
and stopping extruding
3A1320L
Cause
Empty LP-gas tank
LP-gas tank shut-off valve closed
Gas supply hose not connected to tank
Gas lines leaking or disconnected
Burner regulator/flow flame adjusting valve not
functioning correctly
Burner orifice plugged
Burner assembly not functioning correctly.
Empty LP-gas tank
LP-gas tank shut-off valve closed
Torch manual gas shut-off valve closed
Gas supply hose not connected to tank
Gas lines leaking or disconnected
Torch assembly not functioning correctly
Material is cold
Bushings are worn
Linkage ball rod ends need lubrication
Foreign material lodged between agitator and
kettle
Cold material temperature
Gate sticking in guides
Bushings are worn
Gate not completely closed
Foreign material lodged in gate opening
Foreign material in screed box discharge open-
ing
Dirty screed box
Incorrect deployment rod linkage length
Incorrectly adjusted screed box/bead dispenser
box actuator
Worn screed box shear bar
Worn screed box shear bar stop
Screed box not adjusted to ground
Screed box open when ThermoLazer is
stationary
Foreign material in screed box discharge open-
ing
Dirty screed box
Solution
Replace with full tank.
Open LP-gas tank shut-off valve.
Connect gas supply hose.
Check for gas leaks. Connect and tighten fit-
tings.
Replace part (see Parts manual).
Clean or replace part (see Parts manual).
Replace part (see Parts manual).
Replace with full tank.
Open LP-gas tank shut-off valve.
Open manual shut-off valve.
Connect gas supply hose.
Check for gas leaks. Connect and tighten fit-
tings.
Replace part (see Parts manual).
Allow time for material to reach operating
temperature.
Replace bushings (see Parts manual).
Add grease.
Remove material in kettle and CAREFULLY
dislodge and remove foreign material.
Heat material to operating temperature.
Make sure thermometer is free to move.
Check for excess material in guides. Apply
heat as required and remove excess mate-
rial. Add grease to lubricate guides.
Replace bushings (see Parts manual).
Close gate completely.
CAREFULLY dislodge and remove foreign
material.
CAREFULLY dislodge and remove foreign
material.
CAREFULLY clean box. All moving parts
need to be free of debris.
Adjust length (see page 21).
Adjust lever (see page 21).
Replace gate (see Parts manual).
Replace trough (see Parts manual).
See Operation manual.
Synchronize ThermoLazer and screed box
motion.
CAREFULLY dislodge and remove foreign
material.
CAREFULLY clean box. All moving parts
need to be free of debris.
Troubleshooting
37