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© Titan Tool Inc. All rights reserved.
11
Replacing the PRIME/SPRaY valve
Perform the following procedure using PRIME/SPRAY valve
replacement kit P/N 759-380.
Before proceeding, follow the Pressure Relief
Procedure outlined previously in this manual.
additionally, follow all other warnings to reduce the
risk of an injection injury, injury from moving parts,
or electric shock.
1. Pry off the retaining clip from inside the recessed portion
of the valve knob. Remove the valve knob.
2. Slide the cam off of the stem/ball assembly.
3. Using a wrench, remove the hex nut from the pump head.
4. Remove the star washer, spring, and stem/ball assembly
from the pump head.
5. Using a 7/32” hex wrench, remove the stem/ball assembly
seat from the pump head.
Pump head
Star washer
Stem/ball
assembly
Seat
Cam
Spring
Hex nut
Retaining clip
Valve knob
6. Tighten the new stem/ball assembly seat into the pump
head. Use a 7/32” hex wrench. Torque to 6-8 ft./lbs.
7. Apply a light coating of hydraulic oil around the o-ring on
the new stem/ball assembly.
8. Push the stem/ball assembly into the stem/ball assembly
seat in the pump head.
9. Place the new spring and star washer around the stem/
ball assembly.
10. Slide the new hex nut onto the stem of the stem/ball
assembly, thread it onto the pump head, and tighten with a
wrench. Torque the nut to 12-14 ft./lbs.
11. Apply a light coating of grease to the top of the cam.
12. Slide the new cam onto the stem of the stem/ball
assembly and over the hex nut. The design of the cam
will allow the hex nut to fit inside the cam, causing the cam
to lock in position.
Tab
Tab on cam in
12:00 position
NOTE: Position the cam on the hex
nut so that the tab on the
side of the cam is as close
to the 12:00 position as
possible.
SPRAY
PR
IM
E
Pointer on valve knob
in 9:00 position
13. Place the new PRIME/SPRAY
valve knob over the cam with
the pointer on the knob as close
to the 9:00 position as possible.
Make sure the knob is pushed
completely onto to the cam (the
knob should cover the cam
completely).
NOTE: The knob is designed to allow 90º of movement
between the SPRaY and PRIME positions. The
inside of the knob has a 90º opening in it’s
circumference where the tab of the cam should
be positioned to allow this movement. When
placing the knob with the arrow in the 9:00
position, make sure that the tab on the cam
is within the 90º opening on the inside of the
knob. Then, make sure the knob is at the end of
its movement in the clockwise direction (this is
the SPRaY position) before continuing with this
procedure.
Back of PRIME/SPRAY valve knob
90º Opening
Cam positioned
with tab in
90º Opening
14. Slowly turn the knob counterclockwise until the bottom of
the knob moves out to where it is flush with the bottom of
the cam (approximately 5–7º).
15. Place the retaining clip over the stem of the stem/ball
assembly where the stem passes through the recessed
portion of the knob.
16. Using a 5/16” (8mm) nut driver, push the clip into the
recessed portion of the knob with steady, even pressure
until it stops.
IMPORTaNT: Do not hammer or wiggle the clip into
position. It will damage the clip.
18. Turn the PRIME/SPRAY knob to the PRIME position.
19. Start up the sprayer and run water through the system to
check for leaks. If there are no leaks, the sprayer is ready
to use.
