Maintenance
Follow all safety precautions as described in the Safety
Precautions section of this manual before proceeding.
Replacing/Servicing the Seal Assembly
If the spray gun leaks or spits at the tip when the trigger is
released, the needle or seat is worn, damaged, or dirty and must
be replaced or cleaned. Refer to the Parts List section in this
manual for part identification.
Never attempt to perform maintenance on the spray gun
without first performing the “Pressure Relief Procedure.”
1. Disconnect the airless spray hose from the gun.
2. Remove the roller extension or tip extension.
3. With the trigger depressed, remove the diffuser from the
front of the gun.
4. Remove the trigger guard.
a. Pull the back of the trigger guard down so that it comes
loose from the swivel assembly on the handle.
b. Twist the front of the trigger guard out of the slot in the
gun head.
5. Remove the two trigger screws that secure the trigger to the
gun head. Remove the trigger.
6. Remove the handle assembly from the gun head. Pull the
filter out of the gun head..
7. Using a 3/8” socket, remove the lock nut from the threaded
end of the seal assembly inside the back of the gun head.
8. Using a pliers, pull the seal assembly from the front of the
gun head.
9. Soak the removed parts in the appropriate solvent and wipe
clean.
10. Inspect the parts for wear or damage and use new parts
during reassembly of the gun, when necessary.
11. Install the seal assembly into the front of the gun head.
Make sure the threaded portion of the seal assembly is
aligned with the rectangular hole in the back of the gun
head.
12. Thread the lock nut onto the threaded shaft of the seal
assembly in the back of the gun head. Tighten the nut until
approximately 1/16” of the seal assembly shaft sticks out
past the nut.
13. Push the filter into the gun head. Make sure the handle seal
is in position and thread the handle assembly into the gun
head until secure.
14. Reassemble the trigger.
15. Install the seal washer into the front of the gun head.
16. WIth the trigger depressed, install the diffuser into the front
of the gun head. Torque to 45–50 ft./lbs.
17. Test the operation of the trigger. There should be a small
amount of play in the trigger after the trigger is released.
This will ensure that the seal assembly is fully seated in the
diffuser and the gun is shut off when the trigger is released.
Adjust the position of the lock nut on the seal assembly if
trigger adjustment is necessary.
18. Reassemble the trigger guard.
19. Start the sprayer and pressurize the gun (refer to the
instructions in the sprayer’s Owner’s Manual). Check the
gun for leaks.
20. Move the trigger lock to the locked position. Pull the trigger
and check for leaks.
NOTE: Lubricate all packings and moving parts with a
lithium-based grease before reassembly .
WARNING
WARNING
Replacing/Removing the Filter
1. Pull the back of the trigger guard down so that it comes
loose from the swivel assembly on the handle.
2. Remove the handle assembly from the gun head.
3. Pull the old filter out of the gun head.
4. Push the new or cleaned filter into the gun head.
5. Make sure the handle seal is in position and thread the
handle assembly into the gun head until secure.
6. Snap the trigger guard back onto the handle assembly.
Filter Chart
Parts List
Item
Part #
Description
Quantity
1
550-437
Seal washer ...............................................1
2
226-001
Lock nut .....................................................1
3
550-447
Seal assembly ...........................................1
4
550-451
Diffuser ......................................................1
5
550-448
Gun head ...................................................1
6
580-513
Trigger screw, short ...................................1
7
550-455
Trigger........................................................1
8
550-452
Trigger guard .............................................1
9
580-530
Swivel assembly ........................................1
10
550-488
Filter spring ................................................1
11
550-483
Filter, medium ............................................1
12
580-531
Gun handle ................................................1
13
560-038
Handle seal................................................2
14
550-454
Trigger screw, long ....................................1
550-487
Gun repair kit (includes items 1–4)
9
11
12
10
14
13
1
2
3
4
6
5
7
8
Part
Number
Application
Filter
Type
Color of
Filter
Body
550-486
Synthetic resin,
enamels, clean
varnishes, stains
azures
Extrafine
red
550-485
Base coat enamels,
primer enamels,
fillers, marking paints,
textured enamels
Fine
yellow
550-483
Emulsions,
latex paints,
acrylic paints
Medium
white
550-484
Filler paints,
large area surfaces
Coarse
green
P/N 313-2578A © 2005 Titan Tool Inc. All rights reserved.
3
