Graco Python XL 5/8" [28/48] Disconnect the pneumatic motor

Graco Python XL 5/8
Repair
28 3A3948B
Disconnect the Pneumatic Motor
1. Stop the pump.
2. Flush the pump, if possible (see page 12). Follow
Pressure Relief Procedure, page 12.
3. Disconnect the pneumatic line and fluid line and
remove the dust cover (10).
4. See F
IG. 19. Push the safety spring (9) down and
hold to access the coupling pin (8). Push the retain-
ing spring (19) up and push out the pin, using a
screwdriver or punch.
5. Remove the nuts (11) from the bottom of the tie
rods (8).
6. Remove the pump lower (12). The adapter plate
(10) will remain attached to the lower.
7. Remove the safety spring (9).
8. Loosen the nuts (17) at the top of the tie rods, then
remove the tie rods. The mounting bracket (1) is
loosened from the motor as the tie rods are
removed.
9. Take the motor to a work bench. See Repair Pneu-
matic Motor on page 29.
Reconnect the Pneumatic Motor
1. Replace the motor on the mounting bracket (1).
2. Screw the tie rods into the motor, with the top hex
nuts (17) attached. Torque the tie rods to 5-10 ft-lb
(7-13 N•m).
NOTE: Always tighten the tie rods before tightening the
top hex nuts (17).
3. Tighten the top hex nuts (17) to secure the mount-
ing bracket (1).
4. Slide the pump with the adapter plate (10) attached
onto the tie rods (8). Ensure that the safety spring
(9) is in place and the pump outlet is oriented as
desired.
5. Install the tie rod nuts (11). Torque to 100 in-lb
(11 N•m).
6. Align the hole in the displacement rod with the hole
in the pneumatic motor rod. Use a screwdriver to
push in the pin (8).
7. Push the retaining spring (9) into place to cover the
pin.
8. Replace the dust cover (10).
FIG. 19 Retaining spring and connector pin
9
8

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