- Asphalt Paver
- AP1000F (S/N: AC41-107,109-111)
- AP1055F (S/N: TJ51-115,117-121,220-220)
- Industrial Engine
- C7.1 (S/N: 8811-253,255-269,271-272,274-274,276-310,313-373,375-382,386-487,489-523,525-539,542-544,546-551,554-591,593-597,604-606,609-609,611-621,627-627,634-634,638-657,662-662,664-675,683-686,688-692,694-695,697-697,700-700,702-702,713-714,722-723,734-734,736-738,741-747,752-754,756-757,775-778,800-801,803-806,821-823,846-846,879-879,884-884)
- Track Loader
- 963K (S/N: LBL1-102)
- Track-Type Tractor
- D6N XL (S/N: GB61-1,200-207)
- Wheel Loader
- 926M (S/N: LTE1-104,151-151,275-275,304-304,407-407)
- 930M (S/N: KTG1-134)
- 938M (S/N: J3R1-146,541-541,677-677)
- 950M (S/N: EMB1-256,260-262; FTR1-177,433-433)
- 962M (S/N: EJB1-173; JYD1-1; F2T1-129)
- 930M (S/N: KTG1-134)
- Wheel Skidder
- 525D (S/N: GKP1-145,150-150,152-157,166-166,324-324)
- 535D (S/N: MTP1-122,127-128,143-143,145-145,148-148,153-153)
- 545D (S/N: KGP1-109,111-113,117-117)
- 555D (S/N: PGY1-104)
- 535D (S/N: MTP1-122,127-128,143-143,145-145,148-148,153-153)
- Wheeled Excavator
- M318F (S/N: F8B1-295,534-534,536-536,571-571,575-575,578-578,585-585,594-594,599-599)
- M320F (S/N: F2W1-172,320-321,324-324,328-328)
- MH3022 (S/N: FM21-277)
- M320F (S/N: F2W1-172,320-321,324-324,328-328)
Introduction
Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.
There have been some isolated instances of issues with debris blocking up the pickup pipe for the manifold (DEF Heater). This has resulted in a lack of injection of Diesel Exhaust Fluid (DEF). The following diagnostic trouble codes may be displayed in the electronic service tool:
- E931 (2) Low Aftertreatment #1 SCR Dosing Reagent Absolute Pressure: Low - moderate severity (2)
- E1370 (2) Aftertreatment Diesel Exhaust Fluid Dosing Unit Loss of Prime
A new Diesel Exhaust Fluid (DEF) filter has been introduced. The new DEF filter helps to eliminate debris from entering the DEF system and reduces the occurrences of the E931 (2) and E1370 (2) diagnostic trouble codes being displayed.
Safety Section
| NOTICE |
|---|
|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
| |
| Illustration 1 | g00104545 |
Prevent the machine from movement. Park the machine on a level surface.
Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.
Required Parts
Table 1 contains the parts needed to complete the installation of the new DEF filter.
Note: Only one DEF filter group is required per engine. Use Table 2 to determine which filter is the appropriate filter for each DEF header. Illustration 2 shows the location of the DEF header part number.
| Part Number | Part Description | Qty |
|---|---|---|
| 378-3187 | Diesel Exhaust Fluid Filter Gp | 1 |
| 423-3251 | Connector | 1 |
| 391-5262 | Gasket | 1 |
| 425-0385 | Filter As | 1 |
| 452-6055 | Filter Base As | 1 |
| 453-1604(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| 453-1605(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| 453-1606(1) | Diesel Exhaust Fluid Filter Gp | 1 |
| (1) | Use Table 2 to choose the correct part that corresponds to the DEF header |
| |
| Illustration 2 | g03745839 |
| (1) Location of DEF heater part number | |
| DEF Heater Part Number | Required DEF Filter |
|---|---|
| 434-3241 | 453-1604 |
| 434-3242 | 453-1605 |
| 434-3243 | 453-1606 |
Installation Procedure
- Ensure that the area around the DEF heater is clean and free from debris.
- Remove manifold DEF heater from DEF tank. Refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install for the correct procedure.
Show/hide table
Illustration 3 g06013988 Typical example - Position filter base assembly (3) to DEF heater (2). Install screws (1) to filter base assembly (3). Tighten the self-tapping screws (1) securely.
Note: Each half of the adapter has two small locking tabs that secure to the bottom side of the DEF heater.
- Remove existing filter from the pickup pipe on manifold DEF heater. Refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install for the correct procedure.
- Install a new filter to the pickup pipe on manifold DEF heater. Refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install for the correct procedure.
Show/hide table
Illustration 4 g06013992 Typical example - Position the correct DEF filter (5) to the filter base assembly (3). Install band clamp (4). Tighten the band clamp to a torque of
4.5 N·m (40 lb in) . - Install manifold DEF heater to DEF tank. Refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install for the correct procedure.
- Connect hose assemblies, diesel exhaust fluid lines, and harness assembly. Refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install for the correct procedure.
Show/hide table
Illustration 5 g06014030 Typical example - Remove existing inlet port fitting (6) and the O-ring seal from DEF pump (7).
- Install a new O-ring to inlet port fitting (6). Install inlet port fitting (6) to DEF pump (7). Tighten fitting (6) to a torque of
4.5 N·m (40 lb in) . - Remove the existing DEF filter (8) from the DEF pump. Install a new DEF filter to the DEF pump. Refer to Operation and Maintenance Manual, Diesel Exhaust Fluid Filter - Clean/Replace for the correct procedures.
