Rebuild; Wetted Section Disassembly - Graco PD44 Operation & Maintenance Manual

Rebuild

Wetted Section Disassembly

1. Perform Pressure Relief Procedure, page 25.
2. On Motor Driven PD44s, remove electrical power.
3. Mark and disconnect all material feed lines, pneu-
matic lines, and proximity switch wiring. Remove the
metering valve from mounts.
NOTE: On Micrometer and Motor Driven PD44s, the
rear tie plate is the tie plate with the proximity switches.
NOTE: On LRT PD44s, the rear tie plate is the tie plate
on the same side of the metering valve as the main air
inlets.
4. Remove the four cap screws to remove the rear tie
plate.
Cap Screws
5. Manually move the connecting block down so that
rods are in the extended position.
313876L
6. Loosen set screws on top of the connecting block.
7. Slide the metering rod retaining plate until the larger
hole position is in-line with the metering rod. See
F . 11 in the following step.
IG
8. Once the metering rod plate is in position, manually
move connecting block up. Rods will remain in posi-
tion and connecting block is separated from rods.
Connecting Block
Metering Rod Retaining Plate
F . 11
IG
9. Once the metering rods are disconnected from the
retaining plate, remove the four cap screws from the
front tie plate.
10. Separate the drive cylinder and the valve guides
from the oil cup retaining block.
Rebuild
Metering Rod
Cap Screws
27