Replace Material Needle Assembly; Replace Center Needle Assembly - Graco RS Operation And Repair Manual

Repair
Replace Material Needle
Assembly
NOTE: The material needle assemblies are the two side
needles (105) in the rear of the gun. See page 38.
1. Follow Pressure Relief Procedure, page 20.
2. Loosen four screws (113) then remove trigger
clamp assembly (111). See page 38.
3. Use 1/2 in. deep well socket to break loose and
remove material needle assemblies.
4. Install new material needle assemblies.
5. Ensure needle flats are aligned with one another.
6. Install trigger clamp assembly on gun then perform
Adjust Trigger Clamp procedure on page 29.
NOTICE
Be careful not to overtighten trigger clamp assem-
bly as this will cause the material needles to bind
and cause material needles to operate incorrectly.
36
Replace Center Needle
Assembly
1. Follow Pressure Relief Procedure, page 20.
2. Loosen four screws (113) then remove trigger
clamp assembly (111). See page 38.
3. Use 7/32 in. deep well socket to remove
retainer (108) then remove the needle (106),
spring (107), and o-ring (110).
4. Install new o-ring. Verify needle is clean before rein-
stalling. Use a liberal amount of lubrication.
5. Install rear packing retainer with a liberal amount of
lubrication.
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