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38 308584
Service
ES ON-OFF Valve Repair
1. Prepare the gun for service as instructed on
page 30.
2. Loosen the set screw (24) with the 2 mm hex key
(69). Remove the lever (26) from the valve. See
Fig. 24.
WARNING
MOVING PARTS HAZARD
To reduce the risk of an eye injury, wear
safety glasses when removing or install-
ing the retaining ring (47) as the retain-
ing ring could slip off the tool when com-
pressed.
3. Use internal snap ring pliers (Graco part no.
110090) to remove the retaining ring (47) from the
handle. Align the holes in the retaining ring with
the flat on the spacer (32) to ease assembly and
disassembly.
4. Remove the valve body (38) from the handle; be
careful not to drop the regulator disk (46) and
spacer (32).
5. Clean and inspect the parts for damage. Replace
parts if necessary. Lightly lubricate the o-ring (36)
with petroleum jelly.
CAUTION
Do not over-lubricate parts. Excessive lubricant on
the o-ring (36) can be pushed into the gun air pas-
sage and blemish the finish on the workpiece.
6. Install the regulator disk (46) in the valve (38) with
its bevelled side facing toward the valve.
CAUTION
Be sure the regulator disk (46) is installed correctly.
A missing or incorrectly installed regulator disc can
cause severe damage to the power supply turbine.
7. Install the valve (38) with the regulator disc (46)
and o-ring (36) into the gun handle. Install the
spacer (32) on the valve.
8. Install the retaining ring (47) into the groove in the
handle.
WARNING
MOVING PARTS HAZARD
Always make sure that the retaining ring
(47) is engaged in the groove in the gun
handle when installing the ES ON-OFF
valve. If the retaining ring is missing or improperly
installed, the valve assembly can be propelled out
of the gun when air pressure is applied and cause
serious injury.
9. Install the lever (26) and tighten the set screw (24).
26
36
47
32
38
46
24
Fig. 24
Apply a very light coat of lubricant to the o-ring (36).
Bevelled side of the regulator disk (46) toward the valve (38).
05363B