Operation; Pressure Relief Procedure; Trigger Lock - Graco Dura-Flo 7847 Instructions Manual

Operation

Pressure Relief Procedure

Trapped air can cause the pump to cycle unexpectedly,
which could result in serious injury from splashing or
moving parts.
1. Engage trigger lock.
2. Shutoff the pump:
a. For air-powered pumps, close the bleed-type
master air valve.
b. For hydraulic-powered pumps, close the supply
line shutoff valve (U) first, then close the return
line shutoff valve (V).
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
311828F

Trigger Lock

Always engage the trigger lock when you stop spraying
to prevent the gun from being triggered accidentally by
hand or if dropped or bumped.
Operation
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