Service; Disassembly - Graco 26C624 Instructions Manual

Service

NOTE: Follow the Service Notes in Figs. 8 and 9 when
reassembling the gun.
NOTE: Gun repair kits are available. See page 18.
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 288137 Fluid Repair Kit.

Disassembly

1. Follow Pressure Relief Procedure, page 12.
2. Unscrew the four screws (14) and remove the gun
from the manifold. NOTE: Model 26C625 will have
six screws (14).
3. Models 288048 and 288554: Unscrew the tip
retainer nut (7). Remove the spray tip (9) and
gasket (8). See F . 16, page 20.
IG
Models 26C624 and 26C625: Unscrew the XHD
RAC Tip Guard (7).
4. Remove the cap (18) from the piston housing (1).
Remove the springs (20 and 19).
5. Remove the seat (10, 41).
6. Using the supplied wrench (34), loosen the fluid
needle setscrew (16). Remove the needle stop (17).
7. Model 26C625: Use a 7/32 deep socket to go over
the needle housing. Unscrew the needle stop (17).
Be sure to keep the needle straight when removing it
from the gun. If the needle is bent it must be replaced.
8. Pull the needle assembly (12) straight out the front
of the gun.
9. Remove the gasket (11).
311053L
NOTICE
Install a new gasket (11) whenever you remove the
seat (10, 41) from the gun. Failure to install a new
gasket may result in fluid leaking into the air chamber.
10. Remove the piston. Using a pliers, pull the piston
(21) out of the piston housing (1).
11. If necessary, unscrew the two screws (15) holding
the fluid housing (2) to the piston housing (1). If
worn, remove the gasket (13) from the bottom of the
piston housing.
15
2
1
F . 15: Fluid Housing Disassembly
IG
12. Remove the large o-ring (22) from the piston and
the smaller o-ring (23) from the piston shaft.
Remove the two o-rings (25, 26) from each of the
piston stems. Check that the stems are solidly in
place. If they are loose, replace the entire piston
assembly (21).
13. Perform the following applicable step:
- Non-circulating Paint Guns: Remove the fluid
outlet port plug (4) and gasket (3) from the fluid
housing (2). Remove the o-ring (5) and backup
(6) from the plug.
- Circulating Paint Guns: Remove the gasket (3)
from the fluid housing (2).
- Sealant Gun: Remove the gasket (3).
14. Clean all parts and replace any worn parts. When
assembling, lubricate the threads with anti-seize
lubricant.
NOTICE
40
(Models 288554
and 26C625 only)
15
TI8197a
Service
19