Engine
7-15
6036, 6042, 8042, 10042, 10054 31211015
b. DEF Header Filter Replacement
1. Remove old filter and discard.
2. Install new filter (11) on the header assembly (9).
c. DEF Header Installation
1. Orient and secure the header (9) with the previously
removed hardware.
Note: Verify the indent on the bottom of the header is located
on the centering nub on the bottom of the DEF tank.
2. Refer to Section 7.6.8, “Cummins Diesel Exhaust Fl
uid
(DEF) T
ank - (if equipped for ULS 110 hp (82 kW)) (S/N
0160082087 to Present)”, for DEF tank installation.
7.6.10 Diesel Exhaust Fluid (DEF) Pump Filter –
(if equipped for ULS 85hp or 110hp)
(63kW or 82kW))
1. Refer to Section 7.6.6, “Diesel Exhaust Fluid (DEF) Pump
F
ilter – (if equipped for ULS 85hp or 110hp (63kW or
82kW))” for DEF pump filter information.
7.6.11 Cummins Diesel Exhaust Fluid (DEF)
System Cleaning – (if equipped for ULS
110hp (82kW))
(S/N 0160082087 to Present)
Note: Contact Cummins at 1-800-CUMMINS for all service if
the DEF tank assembly is still within warranty. Warranty may be
voided if service is conducted by anyone other than Cummins
service personnel.
Note: The following procedures are only to be performed when
warranty is expired.
Cleaning of the DEF System is only required when the
system is exposed to contamination. If DEF quality is in
question, obtain a sample from the DEF tank and place in a
clear container. DEF should be crystal clear with a light
ammonia smell. If the DEF appears cloudy, has a colored tint
or has a strong ammonia smell, it is NOT likely to be within
specifications.
Ensure the DEF solution is the correct specification.
Cummins recommends using only DEF solutions that
maintain 32.5% (+/- 1.5%) of urea content by weight. The
urea content can be easily checked with a Refractometer
(pn 70011925). The DEF solution must meet the
requirements International Standard ISO 22241-1 for diesel
engines. There is no acceptable substitute. For engines using
Selective Catalytic Reduction (SCR) Systems, operating in
the United States and Canada, DEF certified by the American
Petroleum Institute (API) is recommended for use.
DEF should be stored in sealed containers and at 23° to 77° F
(-5° to 25°C). Avoid storing containers in direct sunlight to
assure better shelf life.
Note: The DEF header cannot be cleaned if contaminated. It
must be replaced. Ensure a replacement header has been
obtained before beginning DEF system cleaning procedures.
a. DEF Tank Cleaning
1. Refer to Section 7.6.8, “Cummins Diesel Exhaust Fl
uid
(DEF)
Tank - (if equipped for ULS 110 hp (82 kW)) (S/N
0160082087 to Present)”, for DEF tank removal.
2. Refer to Section 7.6.9, “Cummins Diesel Exhaust Fl
uid
(
DEF) Header – (if equipped for ULS 110hp (82kW)) (S/N
0160082087 to Present)” for header removal.
3. Discard the contaminated header.
4. Remove the drain plug.
5. Thoroughly clean the DEF tank with a mild dish washing
soap and distilled water.
6. Thoroughly flush the DEF tank with distilled water.
7. Install and tighten drain plug.
8. Refer to Section 7.6.9, “Cummins Diesel Exhaust Fl
uid
(
DEF) Header – (if equipped for ULS 110hp (82kW)) (S/N
0160082087 to Present)” for new filter and header
installation.
9. Refer to Section 7.6.8, “Cummins Diesel Exhaust Fl
uid
(DEF)
Tank - (if equipped for ULS 110 hp (82 kW)) (S/N
0160082087 to Present)”, for DEF tank installation.
b. DEF Pump Cleaning
1. Refer to Section 7.6.6, “Diesel Exhaust Fluid (DEF) Pu
mp
F
ilter – (if equipped for ULS 85hp or 110hp (63kW or
82kW))” for DEF pump filter cleaning procedure.
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