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6. Inspect all parts for wear or damage and replace as
required with new genuine Graco replacement parts
from your authorized Graco distributor.
7. Inspect all threads for wear or damage and replace
as required.
8. Tighten all threaded parts securely but not exces-
sively upon assembly.
9. Lightly lubricate all o-rings and threads with grease
(part no. 118665).
10. Check all springs for resilience. They should return
quickly to their original length.
Routine Care
If the material valves are on when the side blocks are
removed, the gun quickly becomes encased in ure-
thane.
It is recommended that the following service be per-
formed on a daily basis.
•
Clean the gun using a brush and an appropriate
cleaning solvent.
•
Inspect the side block seals making certain they are
clean and free of scratches, nicks, or foreign mate-
rial. Clean and replace as required.
•
Remove, clean, or replace the filter screen.
•
Maintain a reasonable stock level of wear items
such as seals and o-rings. See Service and Repair
Kits on page 23.
•
Grease the gun daily to prevent two-component cur-
ing and keep fluid passages clean. Purge air carries
grease mist through the air chamber and impinge-
ment ports, then out the mix chamber nozzle, coat-
ing all surfaces. Use part no. 117773 grease.
313267W
NOTICE
Piston Lock Adjustment and
Installation Procedure
The distance back that the air piston travels when the
gun is activated is factory set on the P2 and, as a rule,
should not require adjustment. Proper travel adjustment
aligns the mixing chamber side ports with the side block
seal-through port.
Follow these steps to determine if the piston travel dis-
tance is correct.
1. Follow the Pressure Relief Procedure on page 13
and disconnect the material hoses from the gun.
2. Turn the material valves (E,F) to the off position.
3. Verify that the piston lock (G) cap has been tight-
ened and fully threaded into the gun.
4. Remove the side blocks (K).
Maintenance
17
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