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REMOVING & INSTALLING A DISPLACEMENT PUMP
Removal
To reduce the risk of serious bodily injury, always
shut off the engine and disconnect the spark plug
before performing any checks or service.
WARNING
1. Flush the sprayer. Remove the suction hose.
Remove the outlet hose.
To reduce the risk of pinching or amputating a fin-
ger, keep fingers away from the connecting link
and pin while jogging the engine.
WARNING
2. Start the engine. Jog the Easy Spray Control (E)
between PRIME and OFF until the connecting link
stops near the bottom of the stroke and is fully ex-
posed. See Fig 2. Shut off the engine.
3. Unscrew the collar (C) and disconnect the power
supply cord from the control (E). See Fig 2.
4. Loosen the two mounting screws (D). See Fig 1.
5. Use a screwdriver to gently pry the retaining ring
up (B) from the back of the connecting link (C).
Then push the pin in so it falls out the back.
6. Remove the two mounting screws (D) while sup-
porting the weight of the pump with your free hand.
7. Disconnect the cables (D) from the pressure drain
valve. See Fig 3.
8. Unscrew the gauge, using a 1.062” wrench.
Unscrew the pressure drain valve assembly from
the the pump.
Installation
1. Screw the pressure drain valve into the pump.
Install the gauge.
2. Push the pin (228) slightly into the connecting link
(C), but not into the mating hole of the pump.
3. Pull the piston rod (201) out of the pump 2 to 3 in
(50 to 75 mm).
4. Align the flats of the pump piston rod and the
pump outlet. Lift the pump into position and gently
push on the pin 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.
Check the back of the bearing housing to be sure
the parts are installed properly.
To reduce the risk of serious injury or property
damage, be sure the retaining spring is firmly
and completely in the groove of the connecting
link to prevent it from working loose due to vibra-
tion. See Fig 1.
WARNING
5. Lift the pump to align the mounting holes and in-
stall the mounting screws. IMPORTANT – torque
the screws to 20 ft-lb (27 N.m). See Fig 1.
6. Connect all cables to the pressure drain valve. See
Fig 3. Plug in the power cord so the notch (F) in
the collar (G) and the tab (H) in the socket align.
Screw on the collar. See Fig 2.
0407
Torque to 20 ft–lb (27 N
.
m)
Fig 1
228
A
B
C
D
228
201
C
B
1
1
2
3
2
Back of pump
Cutaway view shows how pin (228) goes
through connecting rod
3
Fig 2
H
F
G
E
01782
Fig 3
D
01901
