Rebuild; Disassembly - Graco Dispensit 1093 Operation & Maintenance Manual

Rebuild

Before proceeding, remove material feed line and pump
material out of the valve. Shut power off from control
panel and disconnect main power. Disconnect the motor
wire harness from the system. Loosen the home and
spool sensor set screws. Note the position of the sensors
and slide them out of the valve. Disconnect the air lines.

Disassembly

To reduce the risk of electric shock, turn off and
disconnect power at main switch before
disconnecting any cables and before servicing or
installing equipment.
Disconnect electrical power before servicing the motor
and motor coupling assembly. See the illustrations shown
on page 21.
See the illustration on page 19 and the assembly drawing
in the back of this manual for your exact model.
Disassembly of 1093 Valve Section
1. Remove the mounting screws to remove the valve
from the support.
2. Remove the motor from the mounting plate (222),
then loosen and remove the socket head cap screws
(229).
3. On the right side of the valve, remove the valve end
cap (109). The valve piston spool (112) will be inside
the end cap.
NOTE: If necessary, apply low air pressure through the
valve air inlet to push the valve piston spool (112) out of
the valve end cap (109).
4. Remove the seal plate (123).
5. Repeat steps 3 and 4 with the left side of the valve.
6. Push the spool/sleeve (116) out with a finger. If it
does not slide out, tap it gently using a wood or plastic
dowel.
NOTE: A worn spool and sleeve assembly must be
replaced with a new (matched) assembly. If you are
rebuilding multiple valves, be sure to keep the spools and
sleeves matched.
313566J
7. Remove the needle block (303) from the inlet block
(301).
8. Remove the inlet block (301) from the valve body
(107).
9. Remove the o-rings (119) from the valve body (107).
10. Remove the spool wet seal retainers (114) on the left
and right of the valve body (107).
11. Remove the valve body (107) from the oil cup retainer
(124) by removing the screws (126).
12. Remove the rod sleeve (106) from the valve body
(107).
13. Remove the seal cup (103) from the oil cup retainer
(124). Remove the Posipak rod seal (104) from the
seal cup (103).
14. Slide the guide rods out of the connection block (207).
15. Remove the metering rod (102) from the connection
block (207).
NOTE: Only perform the steps below if the motor coupling
section needs rebuilt.
Disassembly of Motor Coupling Section
NOTE: Disconnect electrical power before servicing the
motor and motor coupling assembly.
See the illustration on page 13 for your exact model.
16. Remove the screws (208) to disconnect the connec-
tion block (207) from the lead screw connector block
(209).
17. Remove the lead screw connector block (209) from
the lead screw by removing the FHSC screw (210).
18. Remove the mounting plate (222) from the drive
assembly by removing the SHC screws (223).
19. Remove the retaining sleeve (221) from the drive
assembly by removing the screws (213).
20. Remove the lead screw (217) and lead screw nut
(216) with the ball bearing assembly (215) and e-ring
(214) attached.
Rebuild
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