Fayat DYNAPAC F1000T T4f, Operation & Maintenance Manual

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mounting base until it is completely seated in the tank bore.
- Position the retaining ring on Head unit and install the retention screws using the T25
Torx wrench. Recommended torque on screws is 20-30 in-lbs (2.26-3.38Nm)
DEF suction filter
-
Pull the old filter off of the suction tube and discard.
- Position the new filter’s suction tube housing onto the bottom of the suction tube and
press the filter flush against the bottom of the heater tube fin. Align the filter so the filter
retention screw can screw into the retention screw housing.
- Install the retention new screw.
- Once the retention screw is installed, the MFHU will be ready to be installed into the
tank.
Tri-function sensor
Sensor Removal & Installation:
-
Loosen and remove the Tri-Function Sensor nut using a 1-5/8” box wrench or pliers. Set
the Sensor nut to the side.
- Remove the sensor and spacer from the retention clips and slide the Tri-Function Sensor
from the DEF head mounting base. A flathead screwdriver may be used to assist in
wedging the sensor free from the clips.
- Inspect the new Tri-Function Sensor for signs of damage. Verify an O-Ring is located
below the threading at the top of the sensor and should have Parker O-Ring Lubrication
applied.
- Feed the new Tri-Function Sensor cable into the bottom of the mounting base through
the sensor opening. Press the Tri-Function Sensor into the retention clip with the foot of
the sensor parallel with the Filter Element.
- Insert the spacer between the two retention clips and orient as seen in the image below.
- Position the top of the sensor through the mounting base such that the upper threaded
portion of the sensor is seen. Ensure the top surface of the header is cleaned and install
the Tri-Function Sensor nut on the top by feeding the cable through the sensor nut and
screwing down the nut on the sensor down to the mounting base. Tighten nut to 40 in.
lbs (4.5 Nm).
- Once the Sensor nut is installed the MFHU is ready to be installed into the tank assembly.
DEF Suction Filter is located at the
bottom of the Multifunction Head Unit
assembly thus requiring the head unit to
be removed from the DEF reservoir.
Filter Removal & Installation:
-
Locate the filter retention screw and
remove using the T15 screw driver.
Discard the screw.