Peterbilt 220 - Figure 4-2 Measurement Location of DEF Supply Module (Pump); Figure 4-3 Measurement Location of DEF Dosing Module (Injector); Measurement Reference Points

4-4
Section 4
Exhaust & Aftertreatment
Measurement Reference Points
For all relocation procedures, the measurement points referenced in the guidelines are taken from the following specific
points:
Supply Module: The supply module is commonly called a pump. The measurement point on the supply module is the top
of the DEF fluid pressure line. See Figure 4-2.
Figure 4-2 Measurement Location of DEF Supply Module (Pump)
Dosing Module: The dosing module is commonly called an injector, this injector is located on the SCR mixing pipe
which is between the DPF and SCR canister. The measurement point on the dosing module is the top of the DEF fluid
pressure line. See Figure 4-3.
Figure 4-3 Measurement Location of DEF Dosing Module (Injector)
The following relocation guidelines are dependent on exhaust configuration and DEF tank type and location.
The Dosing Module should not need to be relocated, however if it is removed for any reason, it is critical that the module
is reinstalled at the correct orientation. Figure 4-4 below illustrates the correct installation orientations. The angle
references the vertical plane.