Service
INJECTION HAZARD
To reduce the risk of a serious injury,
including fluid injection,
D
Follow the
Pressure Relief Procedure on page
6 when you stop dispensing, before servicing
the gun, and whenever you are instructed to
relieve the pressure.
D
After adjusting or servicing the gun, make sure
the fluid will not trigger on when the trigger safe-
ty is locked. If fluid does flow, the gun is not
assembled properly or the trigger safety is dam-
aged. Reassemble the gun or return it to your
nearest Graco distributor. Do not use the gun
until the problem is corrected.
D
When removing the gun from the hose, hold the
hex end of the fluid tube (19) securely to avoid
loosening the fluid tube from the gun body. Re-
fer to Fig. 6, page 13.
WARNING
SERVICE NOTES:
INJECTION HAZARD
To reduce the risk of a serious injury,
including fluid injection, if fluid continues
to flow after the trigger is released, ser-
vice the gun immediately as instructed below. Do
not use the gun until the problem is corrected.
WARNING
1. The numbers in parentheses in the text refer to
reference numbers in the drawings.
2. If the fluid continues to flow after the trigger is
released, the gun valve may need adjustment, be
obstructed or damaged, or the valve stem (24),
seat (26), or seal (3) may be worn or damaged.
See Fig. 4, page 11.
a. Adjust the valve or the spring tension as
instructed on page 9.
b. Replace the valve seal, stem, or seat as
instructed on page 10.
c. To inspect the valve for obstruction or damage,
disassemble the gun as instructed on page 11.
Clean and inspect the parts. Replace any worn
or damaged parts and reassemble the gun as
instructed on page 11.
3. Follow the torque, sealant and lubrication notes for
your gun model number.
4. The following repair kits are available:
Gun
Model
Repair
Kit
Description
235–627
235–658*
6.5
_
needle, seat, urethane
seal
235–875
R
seal, o-rings only
235–869
20
_
needle, seat, urethane
seal
237–596
7.5
_
carbide needle, seat, ure-
thane seal
235–628
235–829*
Carbide ball seat, urethane
seal
235–875
R
seal, o-rings only
237–607
237–596*
7.5
_
carbide needle, seat,
urethane seal
235–875
R
seal, o-rings only
235–869
20
_
SST needle, seat, ure-
thane seal
237–649
237–596*
7.5
_
carbide needle, seat,
urethane seal
* These are the standard Repair Kits for the gun
models. The other kits listed are optional.
NOTE: The fluid flow rates of guns using Repair Kits
235–658 and 237–596 are similar. Kit 235–869 will pro-
vide increased fluid flow. Kits 235–658 and 235–869
should not be used to dispense abrasive fluids.
PTFE
PTFE
PTFE
Summary of Contents for Ultra-lite 235627
Page 5: ... Notes ...
Page 21: ...308 253 21 Notes ...
Page 22: ... Notes ...
Page 23: ... Notes ...
