Graco 26R310, Repair And Parts Manual

Page: 27 / 82

Repair
3A8501A 27
Motor Replacement
Tools Used:
• 5/16 and 3/16 in. nut driver
• 3/16 and 5/16 in. hex key
• 9/16 and 1/2 in. socket
• Phillips screwdriver
• 7/8 in. wrench
Motor Removal
NOTE: The enclosure can remain upright for this
procedure.
NOTE: See the image on the following page for part
references.
1. Stop the pumps and turn off the heat zones.
2. Flush the pumps. Follow Flush the Equipment on
page 21.
3. Relieve pressure. Follow the Pressure Relief
Procedure on page 19.
4. Park and shutdown the Reactor. Follow Shutdown
on page 20.
5. Turn the main power switch (MP) off.
6. Use a 5/16 in. nut driver to remove screws (37) and
side pump covers (7).
7. Use a 9/16 in. socket to remove bolts (24) and the
top section of the lower cover (57).
8. Cut the zip ties inside and below the electrical
enclosure (2). Cut the zip tie holding the hose wires
to the outlet manifold (17).
9. Use a Phillips screwdriver to loosen the screws on
the cable pass-through plate under the electrical
enclosure (2). Disconnect connectors MCM #9,
#14, and #15, then separate from the rest of the
bundled cables.
10. Disconnect and unplug heated hoses and
recirculation lines, Disconnect the TSL
compression fittings (44).
11. Disconnect pressure transducer cables under the
outlet manifold (17).
12. Use a 3/16 in. hex key to remove bolts (60) from the
outlet manifold and hang the manifold off the front
of the machine. NOTE: Leave the fluid connections
between the outlet manifold and heaters
connected.
13. Use a 7/8 in. wrench to remove fluid connections
from the heater to the B-side pump, then use a
5/16 in. hex key to remove bolts (110) from the
B-side pump housing.
14. Remove the housing and set it aside.
15. Use a 3/16 in. nut driver to remove two screws
(118) and remove the reed switch (119) from the
bearing housing (106).
16. Use a 1/2 in. socket to remove five gear housing
bolts (107), then remove the gear housing and set it
aside.
17. Repeat steps 13-16 on the A-side pump.
18. Use a 1/2 in. socket, remove bolts (22) from the
motor plate (3). NOTE: Secure the motor assembly
before removing all four bolts.
19. Pull the motor plate straight out. Make sure all
cables are free of snags and set the plate on a
working surface.
WLD
MP
NOTICE
To prevent a short circuit or lowering the transformer
life, do not splash fluid on the transformer. Cover the
transformer with a plastic sheet or piece of cardboard.