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Repair
Repair
NOTICE
To prevent dropping the system and damaging it,
use at least two people when lifting, moving, or dis-
connecting the pump. If disconnecting the lower, be
sure to securely brace the pump, or have two peo-
ple hold it while another disconnects it.
Disconnect the Lower
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
1. Flush the pump. Perform Flushing, page 8.
2. Perform Pressure Relief Procedure, page 7.
3. With fluid pressure relieved, remove fluid inlet and
outlet connections from pump lower.
4. Disconnect pump rod (see F
a. Push piston rod protective spring up and away
from coupling assembly.
b. Remove clip (A), and slide coupling cover (B) up
to remove coupling (C).
B
A
F
. 2
IG
5. Hold the tie rod flats with a wrench to keep the rods
(2) from turning. Unscrew the nuts (4). Remove the
lower (3). See Parts on page 11.
10
. 2):
IG
C
ti21656a
6. To service the lower, refer to lower manual 332649,
supplied. To service the air motor, refer to air motor
manual 312796, supplied.
Reconnect the Lower
1. Make sure the spring guard is in place over the air
motor shaft.
2. Use at least two people to hold the lower while
another reconnects it to the motor. Place the lower
(2) on the tie rods (6) then screw the nuts (4) onto
the tie rods (2). Torque to 50-60 ft-lb.
3. Install coupling (C), slide coupling cover (B) over
coupling, then install clip (A) to secure pump rod to
air motor rod.
4. Reconnect all hoses.
5. Reconnect the ground wire if it was disconnected.
6. Fill the wet-cup 1/2 full of Graco Throat Seal Liquid
(TSL).
7. Turn on the air power supply. Run the pump slowly
to ensure that it operates properly.
332650A
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