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Diaphragm Pump Repair Kit ( # 0610406-K)
1. Using a 13mm socket wrench,
remove handle bolts and loosen the
stop plate (A) and remove the two
allen head screws (B) that hold the
connecting pieces to the pump rod.
Figure 1.
2. With unit laying on its back
with pump assembly facing you,
remove the pump rod (C). Loosen
hose clamp and remove pressure
hose (D). Caution: There may be
liquid inside the hose and pressure
cylinder even when the tank is
empty. Wear protective gloves.
Next, loosen the clamp at the base
of the sprayer (E). Figure 2.
3. Push the pressure cylinder
approximately 1/2" out of the
bottom of the tank. Then turn the
pump assy. 180 degrees. Note:
Wooden block may be used to
tap the pump assembly through
bottom of tank. Remove pressure
regulating valve, if equipped before
removal of cylinder.
4. Next remove the 12 torx screws
that hold the flange in place. The
flange and diaphragm can then
be removed. Figure 3. Note: For
clarity the pressure cylinder is
shown removed from the tank.
5. To replace the diaphragm,
remove the connecting rod retaining
screw (G) from the plunger and
lever (F). Replace the diaphragm
and reassemble. See Figure 4.
6. The valve assy. (H) is removed
using a locally made tool. Remove
red valve plate retaining pin using
needle nose pliers, then insert tool
into slots. See Figure 5. Use a
screwdriver to rotate tool counter
clockwise.
7. The valve plates and O-rings
can now be replaced. The bottom
valve plate is secured into place
with the red retaining pin. Push pin
into place using needle nose pliers.
Figure 6.
8. The pump housing (I) is separa-
ted from the pressure cylinder (J)
by pulling it off. Figure 7. The O-
ring can then be replaced.
Figure 6.
Figure 7.
Figure 5.
Figure 4.
Figure 3.
Figure 1.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 2.
L
M
N
P
O
K
G
F
H
I
J
9. When reassembling the pump
housing to the pressure cylinder, be
sure the square tab on the pump
housing (K) is aligned in the notch.
See arrows (L) on the pressure
cylinder in Figure 8. Be careful not to
pinch or nick the O-ring.
Note: Grease O-rings for re-assembly.
Screw the valve assembly into the
cylinder.
10. Place diaphragm assembly (O)
onto the pump housing (M). Place
the flange (N) over the diaphragm.
Reinstall the 12 torx screws around
the outside diameter of the flange.
Figure 9.
11. Lubricate the large O-ring and
then push the pressure cylinder into
the tank being careful not to pinch
the large O-ring (P).
Note: Wooden block may also be
used for installation of the pressure
cylinder.
12. Tighten pump clamp securely
(E). Install pump rod (C). Reinstall
the connecting pieces and allen head
screws (B). Reinstall the stop plate
(A) making sure that the bolt goes
through the rear hole. Reinstall the
hose and hose clamp making sure it
is firmly secured (D).
INSTALLATION INSTRUCTIONS
9
Note: Always wear rubber gloves, safety goggles and
appropriate protective clothing when repairing a sprayer. Work
in a well ventilated area. Prior to repair, flush unit with water by
filling, then spraying the water into an appropriate container or
area. Ensure that all pressure is released by locking the shut-off
valve in the open position. Once a repair is completed, fill the
unit with clean water, pressurize, and check for leaks. If the
sprayer leaks, DO NOT USE. Repair leaks and recheck.
Tools needed for kit installation: 6mm Allen Head Wrench, Flat Screwdriver, 11mm Wrench or Cresent Wrench, Long Nose Pli-
ers, Hammer, 13mm Socket or Wrench, T-25 Torx Screwdriver, Grease or Petroleum Jelly, 2X4 Piece of wood 18” long
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