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Installation/Operation
How to Check the Gun Diffuser Operation
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat. The seat
does have a diffuser.
The optional Non-diffused Needle and Seat Kit,
237260, has the number 125 stamped on the needle
and seat. The seat does not have a diffuser.
WARNING
INJECTION HAZARD
The diffuser, located in the valve seat,
creates an irregular spray pattern when
the gun is sprayed without a tip guard,
such as during cleaning. The irregular spray pat-
tern helps reduce the risk of an injection injury.
If you are using the optional Kit 237260, you must
take extra precautions to keep your hands and
body away from the nozzle of the gun.
Always have the tip guard in place during regular
spraying operations.
WARNING
INJECTION HAZARD
To reduce the risk of an injection injury,
follow the Pressure Relief Procedure
on page 7 whenever you are instructed
to relieve the pressure.
Check the diffuser operation weekly. The gun diffuser/
seat (2a) breaks up spray and reduces the risk of
injection when the tip is not installed. Perform the test
below. If it fails, replace the entire Needle and Seat Kit.
Diffuser/seats and needles are not sold separately;
using old parts with new ones will result in leakage.
1. Relieve the pressure.
2. Remove the tip guard and spray tip.
3. Start the sprayer and adjust it to the lowest
pressure.
4. Aim the gun into a grounded metal pail while
holding it firmly to the pail. Trigger the gun. If the
fluid emitted is not diffused into an irregular
stream, replace the entire needle kit immediately.
See Fig. 5.
Fig. 5
1
Irregular spray pattern
1
2a