Graco Dispensit 1053-10C, Operation & Maintenance Manual

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Troubleshooting
3A0874F 19
Troubleshooting
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.
Perform Pressure Relief Procedure before perform-
ing any troubleshooting procedure.
Problem Cause Solution
Metering valve stalling and no mate-
rial being dispensed despite ade-
quate input pressure Blocked needle Check needle for cured material,
replace as required
Metering valve not discharging nor-
mal or full volume Low material level in reservoirs Fill material reservoirs and prime the
machine
Air in material tank Fill reservoir and prime machine
Material leaks past spool valve Spool valve worn or damaged Replace the spool valve
The 1053 valve will not cycle Cycle detection sensors not working Check connections or replace as
needed
The 1053 valve cycles slowly Oil cup/wet cups are not supplied
with lubrication Add lubrication. Note: Lubrication
must be compatible with all seals.
The 1053 valve drools or leaks Air is trapped in the valve Prime the valve until air/free material
is visible
Seals are worn Replace seals
Spool will not actuate Low air pressure Increase air pressure to approxi-
mately 20-30 psi
Cured material on spool Check spool for cured material,
replace as required
Seals are worn Replace seals