Instructions / Assembly
6 3A4788B
Prime Pump/Spray Valve and
Knob Replacement
Replacement of the Prime Pump/Spray valve or the
Prime Pump/Spray knob can be accomplished without
removing enclosure cover.
1. Perform Pressure Relief Procedure, on page 1.
2. Disconnect power (remove battery or unplug power
cord).
3. Remove cross-head screw (37a) from Prime
Pump/Spray knob (18).
4. Using a 5/8 in. (16mm) deep socket, remove Prime
Pump/Spray valve (9) from pump assembly (1).
5. Thread new Prime Pump/Spray valve (9) into pump
assembly (1). See assembly drawings for torques.
6. Rotate prime valve stem so the valve stem pocket is
pointed towards the rear of the sprayer.
7. Install Prime Pump/Spray knob (18) so the knob is
pointing forward. Install cross-head screw (37a).
8. Knob will only rotate forward and down. See assem-
bly drawings for torques.
9. After assembly is complete, perform Assembly
Verification, on page 7.
Pump Assembly Replacement
Removal and replacement of the pump assembly can
be accomplished without removing the motor.
1. Perform Pressure Relief Procedure, on page 1.
2. Disconnect power (remove battery or unplug power
cord).
3. To replace the pump assembly (1) you must first
remove the enclosure cover (31). See Enclosure
Cover Removal/Replacement, on page 4.
4. Remove pump assembly (1) from SmartControl
enclosure (12).
5. On a brushless sprayer, use a wrench to hold the
pump bearing. Remove the screw that retains the
static dissipation wire. Save the screw.
6. Locate new pump assembly (1). Do not remove the
yellow pump locking device until the new pump is
installed in the SmartControl enclosure housing
(12).
7. On a brushless sprayer, use a wrench to hold the
pump bearing. Install the static dissipation wire
screw. See assembly drawings for torques.
8. Place pump assembly (1) into SmartControl enclo-
sure (12), while making sure the bearing is in the
enclosure boss and the gear meshes with the motor
gear.
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NOTICE
Removing the pump locking device and or
spinning the gear before installation will
permanently damage the pump.
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