Graco 313876F Manuel d'utilisateur télécharger pdf (Page 29)

Troubleshooting

313876F 29

Troubleshooting

Schematics

For standard machines, the schematics will be

included in the PD44 Parts manual. See Related Manu-

als on page 3.

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 mixer Check mixer for cured material,

replace mixer as required

Flow control valve closed Open

Metering valve not discharging nor-

mal or full volume

Low material level in reservoirs Fill material reservoirs and prime the

machine

Air in material tanks Fill reservoirs and prime machine

Material leaks past spool valves Spool valve worn or damaged Replace the spool valve and sleeve

Improper material mixing Mixer not clean or free Remove and replace the mixer

Material leaks around mixer while

dispensing

Cured material in mixer Check mixer for cured material,

replace mixer

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Graco 313876F Manuel d'utilisateur Page 29