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Troubleshooting
Perform Pressure Relief Procedure before perform-
ing any troubleshooting procedure.
Problem
Metering valve stalling and no mate-
rial being dispensed despite ade-
quate input pressure
Metering valve not discharging nor-
mal or full volume
Material leaks past spool valve
The 1053 valve will not cycle
The 1053 valve cycles slowly
The 1053 valve drools or leaks
Spool will not actuate
Schematics
For standard machines, the schematics will be
included in the Controls Parts manual. See Related
Manuals on page 2.
For custom machines, the schematics will be included
in the assembly drawings manual.
3A0874D
Cause
Blocked needle
Low material level in reservoirs
Air in material tank
Spool valve worn or damaged
Cycle detection sensors not working
Oil cup/wet cups are not supplied
with lubrication
Air is trapped in the valve
Seals are worn
Low air pressure
Cured material on spool
Seals are worn
Troubleshooting
Solution
Check needle for cured material,
replace as required
Fill material reservoirs and prime the
machine
Fill reservoir and prime machine
Replace the spool valve
Check connections or replace as
needed
Add lubrication. Note: Lubrication
must be compatible with all seals.
Prime the valve until air/free material
is visible
Replace seals
Increase air pressure to approxi-
mately 20-30 psi
Check spool for cured material,
replace as required
Replace seals
17
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