Operation - Graco President L Series Technical Data Manual

NOTE: See your separate pump manual for detailed
operation instructions.
Restarting a Stalled Air Motor
CAUTION
Never exceed 180 psi (1.2 MPa, 12 bar) air supply
pressure to the air motor. Exceeding this pressure
may cause the air motor to stall with the air transfer
valves stuck at mid position, making the air motor
inoperative.

Operation

To reseat the air transfer valves and restart a stalled
air motor, relieve the air supply pressure to the motor
by closing the bleed-type master air valve. If the air
transfer valves fail to reseat, screw the cap nut (F) out
of the cylinder (G), pull up on the trip rod (H) and
screw the cap nut back into the cylinder. See Fig. 2.
Be sure the air supply pressure is less than 180 psi
(1.2 MPa, 12 bar) before opening the bleed-type
master air valve.
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