Replace Radar Level Sensor - Graco XM PFP 273231 Repair And Parts Manual

55 gallon (208 liter) feed system
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Repair

Replace Radar Level Sensor

NOTE: Order radar level sensor kit 26C587. See Feed
Modules on page 45 for kit contents.
NOTE: Tank level sensors changed in 2014. The old
sensors were red. The new sensors are blue. The blue
sensors can be used as direct replacements for the red
sensors.
1. With the tank empty, close the tank air supply ball
valve then open the valve on the tank lid to
de-pressurize the tank.
Valve
26
2. Disconnect cable at the bottom of the feed module.
Always use the new cable supplied with the sensor.
It has different connections than the old sensor.
3. Disconnect 3/4 in. union that holds the level sensor
on top of the tank.
4. Pull the old sensor straight up out of the tank.
5. Remove plugs from new sensor and discard plugs.
Move fittings from old sensor to new sensor.
6. If the sensor rod was removed for shipping, apply
blue thread-lock to the threads in the end of the
rod.
7. Feed the rod into the sensor head and screw the
threaded end into the sensor head.
8. Use a wrench to hold the 3/8 in. flats on the sensor
rod.
9. Tighten to approximately 25 - 30 in-lb (2.8 - 3.4
N•m). Do not over-tighten.
Tank Air
10. Reconnect sensor cable.
Supply Ball
Valve location
11. See Set Up a New Radar Level Sensor, page 27.
(on other side
of panel)
3A8047B

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