Graco PRO AA5500sc unicarb Instruction Manual page 37

Description Function
O-Ring (23a) It seals the cylinder air along the piston
Shaft Air Seal rod. If the air leaks along the piston rod
(23g), replace this o-ring (23a).
O-Ring (23b) It is the air shut-off seal. If the air leaks
Front Air Seal from the air cap when the gun is detrig-
gered, replace these o-rings.
O-Ring (23c) It separates the cylinder air pressure from
Back Air Seal the atomizing air pressure.
U-cup (23f) If the air leaks from the small vent hole in
Cylinder Air the back of the manifold when the gun is
Seal triggered, replace the u-cup.
23c
23b
Fig. 38
23f
23a
03531
308937 37