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308127
Removing & Installing a Pump Assembly
Removal
WARNING
To reduce the risk of serious bodily injury, always fol-
low the
Pressure Relief Procedure W arning on
page 2 before repairing the sprayer.
1. Flush the sprayer. Remove the suction hose, if
used.
WARNING
To reduce the risk of pinching or amputating a fin-
ger, keep fingers away from the area of the con-
necting link and pin while jogging the engine.
2. Start the engine. Jog the pressure control ON/OFF
switch until the connecting rod (C) stops near the
bottom of the stroke and is fully exposed. See Fig
2. Shut off the engine.
3. Unscrew the collar (J) of the power supply cord
and unplug it from the pressure control (F). See
Fig 3.
4. Relieve pressure. See page 2.
5. Remove the outlet hose. Slightly loosen the two
pump mounting screws (D). See Fig 2.
6. Use a small screwdriver to push in the connecting
rod pin (231) just until you can gently pry the re-
taining ring (B) up from the back of the connecting
rod. Push the pin in so it falls out the back.
7. Remove the two mounting screws while supporting
the weight of the pump with your free hand.
Installation
1. Push the pin (231) just barely into the connecting
rod (C), but not into the mating hole of the pump
piston rod (E).
2. Pull the pump piston rod (E) out of the pump 2 to 3
in. (50–75 mm).
3. Align the flats of the piston rod (E) and the pump
outlet. Lift the pump into position and gently push
on the pin (231) while moving the pump slightly
until the pin slips into the hole. Be sure the retain-
ing ring (B) snaps down over the end of the pin.
4. Check the back of the bearing housing (A) to be
sure the parts are installed properly.
5. Lift the pump to align the mounting holes and in-
stall the mounting screws (D). IMPORTANT –
torque the screws to 20 ft-lb (27 N.m). See Fig 2.
6. Plug in the power cord so the notch (H) in the col-
lar (J) and the tab (G) in the socket align. Screw
on the collar. See Fig 3.
WARNING
Be sure the retaining spring (B) is firmly in the
groove of the connecting rod (C), all the way
around, to prevent it from working loose due to vi-
bration. See Fig 2.
If the pin works loose, it or other parts could break
off due to the force of the pumping action and re-
sult in serious bodily injury or property damage and
equipment damage.
Fig 2
Torque to 20 ft–lb
(27 N.m)
Cutaway view shows how
pin goes through
connecting rod
Front view of pump and
sprayer connecting link
0407
1
2
3
231
A
B
C
D
231
E
C
B
1
2
3
Fig 3
0408
J
F
G
H
