Table 201
5. Repeat the ““DEF Dosing System Accuracy Test”” using the
Electronic Service Tool
A. Use Tooling A and Tooling B and refer to Systems Operation,
Testing and Adjusting, Aftertreatment SCR System Dosing - Test
for the procedure.
DEF Dosing
System Accu-
racy Test
Result: The quantity of DEF collected is between 105 mL
(3.6 oz) and 130 mL(4.4 oz).
Proceed to Test Step 6
Result: The quantity of DEF collected is not between
105 mL(3.6 oz) and 130 mL(4.4 oz).
Repair: Install a replacement DEF injector. Refer to Disas-
sembly and Assembly, DEF Injector and Mounting - Re-
move and Install.
Proceed to Test Step 6
6. Observe the Spray Pattern from the DEF Injector During
the ““DEF Dosing System Accuracy Test”” using the Electronic
Service Tool
Note: To observe the spray pattern clearly from the DEF injector,
it may be necessary to run the “DEF Dosing System Accuracy
Test” again using a suitable large container to collect the DEF.
DEF Dosing
System Accu-
racy Test
Result: The spray is finely atomized and conical with even
spray all around.
Proceed to Test Step 7.
Result: The spray is not finely atomized and conical with
even spray all around.
Repair: Install a replacement DEF injector. Refer to Disas-
sembly and Assembly, DEF Injector and Mounting - Re-
move and Install.
Proceed to Test Step 7
7. Inspect the Inside of the Clean Emissions Module (CEM)
Mixer Assembly
A. Remove the DEF injector. Refer to Disassembly and Assembly,
DEF Injector and Mounting - Remove and Install
B. Use Tooling C to inspect the inside of the Clean Emissions
Module (CEM) mixer assembly for DEF deposits.
CEM Mixer As-
sembly
Inspection
Result: DEF deposits are still visible in the Clean Emis-
sions Module Mixer Assembly. Refer to Illustration 125
Repair: Use the electronic service tool to perform the
“Aftertreatment Recovery Procedure 3 times and repeat
step 7B.” .
Note: There are two versions of the “Aftertreatment Re-
covery Procedure” . One version is for engines with a DPF.
The other version is for engines without a DPF. Ensure that
the correct procedure is used.
Note: The success of the “Aftertreatment Recovery Proce-
dure” can be improved by covering the radiator to increase
the engine coolant temperature. The coolant temperature
and charge air cooler outlet temperature must be moni-
tored on the electronic service tool while the radiator is
covered.
Note: Engine RPM Override may be necessary to com-
plete the Aftertreatment Recovery Procedure.
Note: An SCR inlet temperature greater then 370° C
(698° F) will improve the success rate of the “Aftertreat-
ment Recovery Procedure” . This can be achieved by in-
creasing the engine load by applying electrical load. Do
not let the SCR inlet temperature rise above 450° C
(842° F).
Result: The Clean Emissions Module (CEM) Mixer As-
sembly contains no DEF deposits. Refer to Illustration 126
(continued)
364 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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