Spool Valve Rebuild - Graco PD44 Operation & Maintenance Manual

Rebuild
11. Manually move connecting block up and down to
insure rods are properly installed.
12. Install the back plate and cap screws.
Cap Screws
13. Install material inlet blocks with new o-rings.
Material Inlet Block
14. Install material nose assembly with new o-rings.
15. Attach material line, pneumatic line, and electrical
harness.
16. Perform Startup procedure, page 21.
30
Back Plate
O-Ring
O-Rings
Nose

Spool Valve Rebuild

1. Perform Wetted Section Disassembly, page 27.
2. Remove the two cap screws.
3. Disassemble the spool cylinder.
4. Remove the piston from the cylinder.
5. Install new u-cup seal on piston.
Cap Screws
313876L