Diesel Exhaust Fluid (DEF) Pump Troubleshooting on Certain C4.4 Machine Engines {108J, 108K, 108T, 1901, 1920} Caterpillar

Asphalt Compactor

CB64B (S/N: C561-UP)

CB66B (S/N: B661-UP)

CB68B (S/N: C681-UP)

Asphalt Paver

AP500F (S/N: 4491-UP)

AP555F (S/N: AP51-UP)

AP600F (S/N: AP61-UP)

AP655F (S/N: MH61-UP)

Backhoe Loader

416F2 (S/N: HWB1-UP)

420F2 IT (S/N: HWD1-UP)

420F2 ST (S/N: HWC1-UP)

428F2 (S/N: HWN1-UP)

430F2 IT (S/N: HWG1-UP)

430F2 ST (S/N: HWE1-UP)

432F2 (S/N: HWP1-UP)

434F2 (S/N: HWR1-UP)

444F2 (S/N: HWS1-UP)

Compact Wheel Loader

910M (S/N: H221-UP)

914M (S/N: H241-UP)

918M (S/N: H261-UP)

Engine

C4.4 (S/N: JKT1-UP)

Excavator

312F (S/N: KMK1-UP)

313F (S/N: DJE1-UP)

314F (S/N: LFC1-UP)

315F (S/N: TDY1-UP)

316F (S/N: YDL1-UP)

318F (S/N: FFT1-UP)

320F (S/N: NHD1-UP; YBM1-UP)

323F (S/N: YEC1-UP)

325F (S/N: XAA1-UP; YCA1-UP)

Pipelayer

PL61 (S/N: S3H1-UP)

Pneumatic Compactor

CW34 (S/N: AL31-UP)

Telehandler

TL1055D (S/N: ML51-UP)

TL1255D (S/N: ML71-UP)

Track-Type Tractor

D3K2 (S/N: KF21-UP; KL21-UP; JPJ1-UP)

D4K2 (S/N: KM21-UP; KR21-UP)

D5K2 (S/N: KW21-UP; KY21-UP; RRE1-UP)

D6K2 (S/N: DFR1-UP; JTR1-UP)

Vibratory Soil Compactor

CP54B (S/N: P541-UP)

CP56B (S/N: 4851-UP; P561-UP)

CP68B (S/N: P681-UP)

CP74B (S/N: P741-UP)

CS54B (S/N: 4821-UP; CS51-UP)

CS56B (S/N: 4841-UP; S561-UP)

CS64B (S/N: CW61-UP; 4861-UP)

CS66B (S/N: S661-UP; 4871-UP)

CS68B (S/N: CS81-UP; 4881-UP)

CS74B (S/N: 4901-UP; CS41-UP)

CS76B (S/N: 4921-UP)

CS78B (S/N: 4931-UP; S781-UP)

Wheeled Excavator

M314F (S/N: F4A1-UP)

M316F (S/N: F6N1-UP)

Introduction

The problem identified below does not have a permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

There have been instances of faults codes with the DEF Pump, which can lead to an engine derate condition. Affected part numbers for the DEF pumps are:

• 473-2749 Diesel Exhaust Fluid Pump Gp

• 473-2750 Diesel Exhaust Fluid Pump Gp

• 466-8285 Diesel Exhaust Fluid Pump Gp

• 466-8286 Diesel Exhaust Fluid Pump Gp

The codes can be:

Caterpillar is investigating the root cause of these issues. To support the investigation, Caterpillar is requesting that the following steps are completed, documented, and recorded in SIMSi.

Solution

Before starting any troubleshooting, download a Product Status Report (PSR) from the affected engine. Ensure that the PDF and the XML version of the PSR are downloaded, with the Histogram option selected in the Download List.

Follow the appropriate troubleshooting steps for the displayed fault codes. Document the results of the troubleshooting tests in the relevant tables. Refer to Tables 2, 3, and 4.

If Troubleshoot requests the Pump and Electronics Unit (PEU) to be replaced, conduct the following inspection before removal of the PEU.

1. Check the DEF for contamination, if the relevant troubleshooting procedure has not instructed you to do so. Refer to "System Operation Testing and Adjusting", Diesel Exhaust Fluid Quality - Test for the correct procedure.

2. Inspect the DEF tank cap, DEF header filter, DEF pump filter for any visible obstruction
   Show/hide table

   Illustration 1	g06152768
   (1) DEF line in (2) DEF line out (3) DEF line out let connection (4) DEF line inlet connection (5) Injector DEF line

3. Inspect and photograph both ends of the DEF fluid lines. If the ends of the lines are damaged or swollen, replace the DEF lines. Refer to "Disassembly and Assembly", Diesel Exhaust Fluid Lines - Remove and Install.

At the end of the service take another PSR irrespective of outcome. Ensure that the PDF and the XML version of the PSR are downloaded, with the Histogram option selected in the Download List.

If the troubleshooting steps have required a component to be changed, hold all replaced components for 30 days for a possible Parts Return Request (PRR). Make sure to include the closed work order paperwork.

In every instance submit a SIMSi report, complete with TIB number M0079072, CPI number 359775 and submit through the CPI feedback tool within the SIMSi.

• Detailed description of symptom experienced and under what conditions issue occurred

• Product Status Report (PSR) before and after troubleshooting. Ensure that the PDF and the XML version of the PSR are downloaded, with the Histogram option selected in the Download List.

• Completed Troubleshooting steps tables. Refer to Tables 2, 3, and 4.

• Details of DEF tank cap, DEF header filter, DEF pump filter, visual inspection

• Photos of DEF fluid lines

• Details of parts replaced

• Machine location (city, state, country)

• Machine manufacturer and sales model

• Regeneration summary report from the engine ECM

• Warranty report from the ECM

• Engine operating hours