Graco Dispensit 1093 Operation & Maintenance Manual page 26

Rebuild
screws in a cross pattern gradually to prevent bind-
ing due to misalignment.
24. Push the spool rod (116) into the valve body (107)
until it contacts the piston.
25. Install the lubricated o-rings (119) to the main body
(107) and attach the inlet block (301) with screws
(304).
26. Lubricate the gasket (302) and attach it to the inlet
block (301).
27. Install the needle block (303) with screws (306).
Remount the valve.
28. Install the upper/home/lower sensors (125).
29. Install the shift spool position dispense/reload sen-
sors (125) with the screw (127) using adhesive
(149).
30. Install the air supply lines and connect the power.
31. Perform the Dry Run, Loading & Priming and Output
Verification procedures seen on page 15.
26
Motor & Motor Coupling Assembly
NOTE: Disconnect electrical power before servicing the
motor and motor coupling assembly.
1. Assemble the motor coupler by inserting the roll
pins and screws (220). See the Motor and Motor
Coupling illustration on page 21 for more informa-
tion.
2. Assemble the lead screw nut (216) with the bearing
(215) and e-ring (214).
3. Thread the lead screw (217) into the lead screw nut
assembly (216) until the lead screw is flush with the
top of the nut.
4. Slide the lead screw and nut assembly into the
housing (212).
5. Slide the bearing retaining sleeve (221) on to the
lead screw assembly. Take care to line up the slots
in the two pieces (212, 221). Secure the pieces in
place with the socket head cap screws (213).
6. Secure the motor mounting plate (222) to the hous-
ing (212) using the socket head cap screws (223).
7. Place the motor coupler (219) on the motor shaft
and lightly snug the screws (220), leaving about ½"
of motor shaft visible between the motor coupler
and motor. Insert the motor coupler (219) through
the motor mounting plate (222). Align the three roll
pins (see the illustration on page 21) and insert
them into the lead screw nut (216). Gently seat the
motor.
8. Remove the motor and motor coupler. Tighten the
screws (220) to 10 in-lbs and reassemble. Secure
the motor to the motor mounting plate using the
socket head cap screws (229).
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