Graco PerformAA 26B570, Instructions Manual

Page: 22 / 48

Service
22 3A8553A
Service
To avoid injury, such as skin injection, follow the
Pressure Relief Procedure, page
14, before
checking or repairing the gun.
NOTE:
Follow the Service Notes in F
IG
. 17 when
reassembling the gun.
Gun repair kits are available. See page 37. Reference
numbers marked with an asterisk (*) in the service
procedures are included with the 288171 Air Seal
Repair Kit. Reference numbers marked with a symbol
(†) in the service procedures are included with the
288136 Fluid Repair Kit.
Items Needed for Service
• 1/16 in. Hex Wrench - provided
• 3 mm Hex Wrench
• Adjustable Wrench
• 4 mm Hex Wrench
• 5/16 in. Nut Driver
• Pliers
• Lubricant part no. 111265; see Kits and
Accessories, page
37, to order
• Compatible Solvent
Disassembly
1. Follow the Pressure Relief Procedure, page 14.
2. Unscrew the four screws (17) and remove the gun
from the manifold.
3. Unscrew the air cap retainer (8). Remove the air
cap (30) and spray tip (9). See F
IG
. 17.
Model 26B573: Unscrew the air cap (30). Remove the
RAC spray tip (9) and RAC housing (11). See Parts,
page
26.
4. Inspect the tip gasket (9a) in place. If damaged,
replace the tip seal.
5. Remove the cap (27) from the piston housing (1).
Remove the springs (28 and 29).
6. Using the supplied wrench (38), loosen the fluid
needle setscrew (19). Remove the needle stop (21).
7. Trigger the gun (or remove cap (27) and springs
(28, 29)) to pull the needle housing off the seat while
you unscrew the diffuser (10) from the gun body (1).
8. Unscrew the needle assembly (14) and use 5/16 in.
nut driver to pull the assembly straight out the front
of the gun.
9. Remove the piston. Using a pliers, pull the piston
(20) out of the piston housing (1). See F
IG
. 16.
10. If gasket (15) needs to be replaced, unscrew the
two screws (18) and separate the fluid housing (2)
and piston housing (1). Inspect gasket (16) and
replace if needed.
NOTE: The gasket (16) is attached to assembly with
adhesive; therefore, if you are replacing gasket (16),
ensure that a replacement gasket is available.
18
18
1
2
TI8173b
NOTICE
Be sure to keep the needle straight when removing it
from the gun. If the needle is bent, it must be replaced.
F
IG
. 16: Gasket repair