Position
Position
Position Sensor
Sensor
Sensor Replacement
Replacement
Replacement
(24W120)
(24W120)
(24W120)
NOTICE
NOTICE
NOTICE
To avoid damage to the encoder and control board,
wear grounding strap (Graco Part No. 112190 –
not supplied) and ground appropriately.
Overview
Overview
Overview
The position sensor is used to determine where the
driver output shaft (H) is in the stroke.
Tools
Tools
Tools Required
Required
Required
• 6 mm Hex Wrenches
• 13 mm Open-Ended Wrench
• 6 mm Open-Ended Wrench
• Phillips Screwdriver (#2)
• Torque Wrench (15 ft-lb, 20 N•m)
Prepare
Prepare
Prepare Driver
Driver
Driver
1.
Remove power from the driver. Follow
appropriate lock-out/tag-out procedures. Wait
five minutes before servicing.
2.
Follow the
Pressure Relief Procedure, page 8
.
3.
Decouple the pump lower from the driver per the
system manual.
Remove
Remove
Remove Electronics
Electronics
Electronics Cover
Cover
Cover
NOTICE
NOTICE
NOTICE
To avoid equipment damage, carefully support the
cover when removing the last bolt. Hold the cover
horizontally and take care that the wires are not
pulled tight.
1.
Remove the 12 bolts (CB) that hold on the
electronics cover using a 6 mm hex wrench.
Place bolts in a safe location.
2.
Pull the cover straight off of the alignment pins
that hold the cover in place.
3.
Support the cover after it has been removed to
prevent putting excess strain on the wires inside.
3A5124B
19
