18SP712 – EPA07 DD15/16 Three-Filter Fuel
System to Two-Filter KM59 GEN1 Fuel System
Conversion Service Kit (P/N: A4710901055)
KIT DESCRIPTION
This service kit includes all necessary parts to convert the DD15/16 three-filter fuel
system to the DD15/16 two-filter KM59 GEN1 fuel system.
KIT CONTENTS
Part No.
A4710909852
A4722030315
A4722003852
A4722030640
A4730702532
A4730702432
A4730702332
A0060705401
A4730702732
A4730702932
A4710700635
A4710780844
A0000700932
A4730700440
A4700780335
A4700780735
A0045405305
A0045405205
A4720781144
05101020
N916016015206
A4700780231
A4720780531
N910105010021
N910105010007
N910105008005
N910105008011
N910105008008
A0019901207
18SP712

Qty.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
2
1
1
6
1
11
2
1
6
1

Description
Fuel Filter module
Connecting pipe
Coolant line
Radiator Support Bracket
Needle Return Line
Amplifier Return Line
Pressure Limiting Valve Return Line
Low Pressure Fuel Lines
High Pressure Pump Inlet Line
High Pressure Pump Outlet Line
Doser Fuel Supply Line
High Pressure Flange
High Pressure Fuel Line Kit
Return Line P-clip
Rail Clamps
Rear Rail Clamp
Water-In-Fuel Wiring Harness
Fuel Temperature Wiring Harness
LPPO Plug
Zip Tie
Coolant Line Clamp
Cylinder Head Fitting
Cylinder Head Fitting
M8x55 Bolt
M8x36 Bolt
M8x25 Bolt
M8x20 Bolt
M8x16 Bolt
M6x28 Micro-encapsulated Bolt
Installation Instructions

18SP712 Page 1 of 15

Removal of the Three-Filter Fuel System
Remove as follows:
1. Disconnect the batteries.

FIRE HAZARD
Do not power wash or steam clean the engine bay in the area of
vehicle electrical components, unless specified by vehicle manuals
or service literature. Power washing/steam cleaning can
permanently damage these components, which could result in fire,
personal injury, or property damage.
2. Steam clean the engine.
3. Remove the fuel feed line from the fuel filter module.
4. Using W470589039100, install J-48710 fuel pressure test kit onto the fuel
feed line at the fuel filter module.
5. Remove the fuel tank fill caps.
6. Using regulator, adjust the system pressure to 345 kPa (50 psi).
7. Pressurize the fuel system for two minutes.
8. Remove J-48710 fuel pressure test kit from the fuel filter module.
9. Install the fuel tank fill caps.
10. Remove the chassis return line from the fuel filter module.
11. Remove the coolant reservoir cap.
12. Open the coolant drain plug (1) located on the left side of the engine block
and attach a hose to the plug.

18SP712 Page 2 of 15

NOTICE: Coolant is a hazardous material and needs to be disposed in an
environmentally responsible manner.
13. Collect the used coolant in a suitable container and if necessary, dispose of
the solution in an environmentally responsible manner according to state and
federal Environmental Protection Agency (EPA) recommendations.

14. Close the drain plug. Torque to 30 N·m (22 lb·ft).
15. Disconnect the coolant lines from the front and bottom of the fuel filter
module.
18SP712 Page 3 of 15

16. Remove the P-clip bolt holding the coolant line to the oil/coolant module.
17. Disconnect the coolant line from the oil/coolant module and remove the
coolant line from the engine. Discard coolant line.
18. Disconnect the water-in-fuel and fuel temperature electrical connectors.
19. If equipped, remove and discard the emergency lubrication line from the fuel
filter module and the high pressure flange.
20. Remove the high pressure pump inlet line from the fuel filter module and the
high pressure flange. Discard the high pressure pump inlet line.
21. Remove the high pressure pump outlet line from the fuel filter module and the
high pressure flange. Discard the high pressure pump outlet line.
22. On V5 three filter fuel systems only, remove the banjo bolt and both sealing
washers from the low pressure fuel pump inlet line. Discard the banjo bolt
and sealing washers.
23. On V5 three filter fuel system only, remove and discard the P-clip bolt
securing the amplifier line to the fuel filter module.
24. Remove the low pressure fuel pump inlet line from the fuel filter module and
the low pressure flange. Discard the low pressure fuel pump inlet line.
25. Remove the low pressure fuel pump outlet line from the fuel filter module and
the low pressure flange. Discard the low pressure fuel pump outlet line.
26. Remove the needle, amplifier, and pressure limiting valve return lines and
needle return pressure control valve from the fuel filter module.
27. Disconnect the engine wiring harness clip from the fuel filter module.
28. Remove the four bolts securing the fuel filter module to the cylinder block.
Discard the four bolts.
29. Remove fuel filter module from the engine. Discard the fuel filter module.
30. Remove the fuel cooler rubber coupling from the engine block. Discard the
fuel cooler rubber coupling.
31. Remove the radiator support rod from the radiator support bracket. Position
aside the radiator support rod.
32. Remove the radiator support bracket. Discard the radiator support bracket.
33. Disconnect the coolant line from the air compressor and remove the coolant
line from the engine. Discard the coolant line.
34. Remove and discard the low pressure flange and gasket from the high
pressure fuel pump.
35. Remove the doser fuel supply line from the doser block. Discard the doser
fuel supply line.
36. Remove the needle return line from the high pressure flange.
37. Unclip the engine wiring harness from the high pressure flange.
38. Remove and discard the high pressure flange and gasket from the high
pressure fuel pump.
39. Remove and discard return line P-clip bolts from the mounting bracket (1).
a. The graphic below illustrates the DD15/16 engines with a serial number
before 472901S0012796.

18SP712 Page 4 of 15

b. The graphic below illustrates the DD15/16 engines with a serial number
after 472901S0012796 and all DD13 engines.

40. Remove and discard two bolts and P-clips (6) from the mounting bracket (1).
41. Cover the high pressure fuel pump elements and high pressure fuel rail feed
line sealing areas on the fuel rail with a clean shop towel.
42. Remove and discard the mounting bracket bolts (2) from the intake manifold
and the mounting bracket (1).
NOTE: When using tool J-48770 to remove the high pressure pump rail feed lines,
hold the high pressure pump fitting with a 24mm wrench.

18SP712 Page 5 of 15

43. Using tool J-48770, remove the high pressure pump rail feed lines (5) and
vibration dampers (4) from the fuel rail and high pressure fuel pump. Discard
the high pressure pump rail feed lines and vibration dampers.
44. Remove and discard the return lines P-clip (3).
45. Holding the rear needle cylinder head fitting with J-48836, use J-48770 to
remove the needle return line from the rear cylinder head fitting and remove
the needle return line. Discard the needle return line.
46. Holding the rear amplifier cylinder head fitting with J-48836, use J-48770 to
remove the amplifier return line from the rear amplifier cylinder head fitting
and remove the amplifier return line. Discard the amplifier return line.
47. Remove and discard the needle and amplifier cylinder head fittings and
sealing washers from the cylinder head.
48. Remove and discard the Pressure Limiting Valve (PLV) line from the fuel rail.
49. Remove and discard all six rail clamp bolts and three rail clamps from the
engine.

18SP712 Page 6 of 15

Installation of the Two-Filter Fuel System
Install as follows:

Bolt Number
1
2
3
4
5
6
7
8

Part Number
N910105010021
N910105010007
N910105008005
N910105008011
N910105008008
A4720940155
N910105006023
N000000007957

Size
M8x55
M8x36
M8x25
M8x20
M8x16
M6x28 (Micro-encapsulated)
M6x16
M6x12 (Micro-encapsulated)

Quantity
6
1
11
2
1
6
5
2

1. Remove and discard the Low Pressure Pump Out (LPPO) sensor (1) from the
fuel filter module.

18SP712 Page 7 of 15

2. Lubricate the new LPPO plug O-ring with a light coat of clean diesel fuel.
3. Install the new LPPO plug (1) on to the fuel filter module. Torque to 21-24
N·m (15-18 lb·ft)

NOTE: The rear fuel rail clamp has mounting holes for the high pressure fuel lines
mounting bracket.
18SP712 Page 8 of 15

4. With the arrows pointing upwards install the three new fuel rail clamps and six
new fuel rail clamp bolts (M6x28 microencapsulated bolt number 6). Torque
to 14 N·m (120 lb·in.).
5. Install the new PLV return line, new sealing washers and new PLV banjo bolt.
Hand-tighten the PLV banjo bolt. Do not torque at this time.
6. Using new sealing washers, install the new needle and amplifier cylinder
head fittings on to the cylinder head. Torque to 55-60 N·m (40-44 lb·ft).
7. Install the new needle and amplifier return lines on to the cylinder head
fittings. Hand-tighten the lines. Do not torque at this time.
NOTICE: DO NOT install any high pressure fuel line bolts and fittings using power tools.
All bolts and fittings MUST be installed using hand tools.

PERSONAL INJURY
All parts provided with this kit, and those they are replacing on the
engine, function as a complete system and are single-use items.
The old parts cannot be reused. Reusing parts or failing to use all
new parts contained in the kit may result in the failure of high
pressure fuel lines, possibly resulting in a fire.

8. Install the new return lines P-clip on to the return lines.
9. Remove the shop towels covering the high pressure fuel pump elements and
high pressure fuel rail feed line sealing areas on the fuel rail.

18SP712 Page 9 of 15

10. Clean the sealing area inside the high pressure fuel pump fittings using a
clean, lint-free cloth.

11. Clean the sealing area inside the high pressure fuel rail using a clean, lintfree cloth.

12. Install the rear high pressure fuel line (3) to the fuel rail and the high pressure
fuel pump. Hand-tighten the nuts.
13. Using tool J-48770, torque the rear high pressure fuel line nuts to
40 N·m (30 lb·ft).
14. Install the front high pressure fuel line (3) to the fuel rail and the high pressure
fuel pump. Hand-tighten the nuts.

18SP712 Page 10 of 15

15. Using tool J-48770, torque the front high pressure fuel line nuts to
40 N·m (30 lb·ft).
16. Install the new mounting bracket (2) and two new mounting bracket bolts (4)
(M6x16 bolt number 7) to the fuel rail clamp. Torque to 15 N·m (132 lb·in.).
17. Install the two new P-clips (5) and two new bolts (M6x12 microencapsulated
bolt number 8) to the high pressure fuel rail feed lines (3) and the mounting
bracket (2). Torque to 15 N·m (132 lb·in.).
18. Install a new bolt (1) (M6x16 bolt number 7) on to the return lines P-clip.
Torque to 15 N·m (132 lb·in.).
NOTE: DO NOT use high pressure fuel lines without new vibration dampers and new
bolts installed.
19. Using J-48770, torque the needle and amplifier return lines on to the cylinder
head fittings at the rear of the cylinder head to 25 N·m (18 lb·ft).
20. Torque the PLV line to the fuel rail to 30-33 N·m (22-24 lb·ft).
21. Clean the high pressure flange mating surface on the high pressure
fuel pump.
22. Install the new high pressure fuel flange onto the high pressure fuel pump
using M8x25 bolt number 3. Torque to 30 N·m (22 lb·ft).
23. Clip the engine wiring harness on to the high pressure flange.
24. Install the new doser fuel supply line with new sealing washers on to the high
pressure fuel flange and doser block. Torque to 25 N·m (18 lb·ft).
25. Lightly lubricate the new fuel cooler rubber coupling with clean engine coolant
and install the new rubber coupling into the cylinder block.
26. Install the new radiator support bracket on to the engine using M8x55 bolt
number 1 and M8x36 bolt number 2. Torque to 60 N·m (44 lb·ft).
27. Position back radiator support rod and install the radiator support rod on to
the radiator support bracket. Torque to OEM specification.
NOTE: The new radiator support bracket no longer has a mounting point for the fuel
filter module; this will not affect the stability of the fuel filter module.

18SP712 Page 11 of 15

28. Install the new fuel filter module to the cylinder block with the four new
mounting bolts (M8x55 bolt number 1). Torque to 60 N·m (44 lb·ft).
29. Install and connect the new coolant line on to the air compressor, fuel filter
and oil/coolant filter module.
30. Install the new P-clips on to the coolant line.

31. Install the mounting bolts (M8x20 bolt number 4) securing coolant line clips to
the fuel filter module and oil/coolant filter module. Torque to 30 N·m (22 lb·ft).
32. Using new sealing washers, install the needle, amplifier, and pressure limiting
valve return lines on to the fuel filter module.
Torque to 30-33 N·m (22-24 lb·ft).

18SP712 Page 12 of 15

33. Lubricate the new high pressure pump inlet/outlet lines and the low pressure
fuel pump inlet/outlet lines O-rings with a light coat of clean diesel fuel.
34. Install the new low pressure fuel pump inlet and outlet lines on to the fuel filter
module and the high pressure fuel pump using M8x25 bolt number 3. Torque
to 30 N·m (22 lb·ft).
35. Install the new wiring harness bracket on to the fuel filter module using
M8x25 bolt number 3 and low pressure lines using M8x16 bolt number 5.
Torque to 30 N·m (22 lb·ft).
36. Install the new high pressure pump inlet and outlet lines on to the fuel filter
module and the high pressure flange using M8x25 bolt number 3. Torque to
30 N·m (22 lb·ft).
NOTICE: Wiring harnesses must NOT come into contact with ANY coolant lines or
fuel lines.
37. Install and connect the new water-in-fuel and fuel temperature wiring
harnesses.
38. Using a zip tie (1), attach the water-in-fuel wiring harness to the wiring
harness bracket.

39. Using a zip tie (1), attach the fuel temperature wiring harness to the low
pressure flange.

18SP712 Page 13 of 15

40. Install the chassis fuel feed and return lines on to the fuel filter module. Refer
to OEM procedures.

ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting
battery cables. The magnetic switch studs are at battery voltage.
41. Connect the batteries.
42. With the engine off, fill the cooling system with coolant at a constant minimum
rate (typically 6 to 8 liters per minute) until it reaches the top of the filler neck
or at the "Cold MAX" level.
43. Prime the fuel system with fuel.

PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a level surface, parking brake is set, and
the wheels are blocked.

ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area. Engine exhaust is toxic.

18SP712 Page 14 of 15

44. Start the engine (no coolant reservoir cap) and idle for one minute. Increase
engine speed slowly to 1000-1200 RPM and hold for one minute. Then
reduce engine speed to idle and cycle up and down between idle and 10001200 rpm for one additional minute.
45. After this three minute burp sequence, stop the engine and add coolant as
required to achieve "Cold FULL" level. If a second top-off is needed, start the
engine and idle the engine for one additional minute.
46. Stop the engine and add coolant as required to achieve the "Cold MAX" level,
and then install the coolant reservoir cap.

PERSONAL INJURY
To avoid injury before starting and running the engine, ensure
the vehicle is parked on a level surface, parking brake is set, and
the wheels are blocked.

ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area. Engine exhaust is toxic.
NOTE: This will eliminate the large pockets of air from the system, although smaller
bubbles will still remain. Normal operation of the vehicle should purge the remaining air
bubbles from the system without any damage. Extremely large cooling systems (such as
in motor homes or luxury coaches) may require additional time for system deaeration.
47. Start the engine and inspect for leaks.

Specifications are subject to change without notice. Detroit Diesel Corporation is registered to ISO 9001:2008.
Copyright © Detroit Diesel Corporation. All rights reserved. Detroit™ is a brand of Detroit Diesel Corporation,
a Daimler company.
18SP712 1601 As technical advances continue, specifications will change. Printed in U.S.A.

18SP712 Page 15 of 15