SB-10056551-6281

18SP701Rev2– GHG14 Two-Filter Fuel System
KM63 GEN2 DD15AT Engines High Pressure
Fuel Feed Lines, Mounting Bracket and P-clips
Service Kit (P/N: A4730704432)

PERSONAL INJURY
All parts provided within this kit must be installed in the proper
locations, and MUST be fastened to the specified torque. Failure
to properly torque hardware/components will result in failure of
a high pressure fuel feed line, resulting in possible fire and/or
personal injury.

PERSONAL INJURY
All parts provided with this kit are single-use items and cannot
be reused. Reuse of hardware/component items may result in
the failure of a high pressure fuel line, resulting in possible fire
and/or personal injury.

18SP701Rev2 Page 1 of 8

NOTICE:
Failure to follow these instructions will result in catastrophic damage to the
engine and will not be covered under warranty.
KIT DESCRIPTION
This service kit includes all necessary parts to replace the high pressure fuel feed lines,
mounting bracket and P-clips in the event one of these parts are loosened, removed or
missing from the engine.
KIT CONTENTS
Service kit P/N: A4730704432 contains all of the necessary parts to replace the high
pressure fuel feed lines on GHG14 DD15AT engines.
Part No.
A4730780210
A4720700540
N000000007957
N910105006023
A4720701140
18SP701Rev2

Qty.
2
2
2
2
1
1

Description
High pressure fuel feed line
P-Clip
Bolt M6x12mm
Bolt M6x16mm
Mounting bracket
Installation Instructions

Removal of the High Pressure Fuel Rail Feed Lines
Remove as follows:

PERSONAL INJURY
To prevent the escape of high pressure fuel that can penetrate
skin, ensure the engine has been shut down for a minimum of 10
minutes before servicing any component within the high
pressure circuit. Residual high pressure fuel may be present
within the circuit.

18SP701Rev2 Page 2 of 8

Item
1

Component
Reused Return lines P-clip bolt

2

Mounting bracket

3

High pressure fuel feed lines

4

Mounting bracket bolts

5

P-clips and bolts

1. Disconnect the batteries.
NOTE: Do not discard the return lines P-clip and bolt. They will be reused on the
installation of the high pressure fuel rail feed lines.
2. Remove the return lines P-clip bolt (1) from the mounting bracket (2).
3. Remove and discard the two bolts and P-clips (5) from the mounting bracket (2).
4. Remove and discard the mounting bracket bolts (4) from the fuel rail clamp and
discard the mounting bracket (2).
5. Using tool J-48770, remove and discard the high pressure fuel rail feed lines
(3) from the fuel rail and high pressure fuel pump.

18SP701Rev2 Page 3 of 8

Installation of the High Pressure Fuel Rail Feed Lines
Install as follows:
NOTE:
DO NOT install bolts and fittings using power tools. All bolts and fittings MUST be
installed using hand tools.

PERSONAL INJURY
All hardware components must be installed in the proper locations,
and MUST be fastened to the specified torque. Failure to properly
torque hardware/components will result in failure of a high
pressure fuel feed line, resulting in possible fire and/or
personal injury.

Item
1
2
3
4
5
6

Component
Return lines P-clip bolt
Mounting bracket
High pressure fuel feed lines
Mounting bracket bolts
P-clips

Part number
Reused
A4720701140
A4730780210
N910105006023
A4720700240

P-clip bolts

N000000007957
18SP701Rev2 Page 4 of 8

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

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

3. Install the new mounting bracket (2) (P/N: A4720701140) and two new mounting
bracket bolts (4) (P/N: N910105006023) to the fuel rail clamp. Torque to 15 N·m
(132 lb·in.).

18SP701Rev2 Page 5 of 8

NOTICE:
New P-clip MUST be installed on to the high pressure fuel rail feed lines with the
Lower P-clip Plate (A) inserted in to the P-clip Window (B).

4. Install both P-clips (5) (P/N: A4720700240) onto both the high pressure fuel rail
feed lines (3) (P/N: A4730780210).

18SP701Rev2 Page 6 of 8

5. Install the rear high pressure fuel rail feed line (3) to the fuel rail and the high
pressure fuel pump. Hand tighten the nuts.
6. Using tool J-48770, torque the rear high pressure fuel rail feed line (3) nuts to
40 N·m (30 lb·ft).
7. Using a new P-clip bolt (6) (N000000007957), install the P-clip (5) on to the
mounting bracket (2). Hand tighten the bolt.
8. Install the front high pressure fuel rail feed line (3) on to the fuel rail and the
high pressure fuel pump. Hand tighten the nuts.
9. Using tool J-48770, torque the front high pressure fuel rail feed line (3) nuts to
40 N·m (30 lb·ft).
10. Using a new P-clip bolt (6) (N000000007957), install the P-clip (5) on to the
mounting bracket (2). Hand tighten the bolt.
11. Reinstall the return lines P-clip bolt (1). Torque to 15 N·m (132 lb·in.).
12. Torque both new P-clips bolts (6) to 15 N·m (132 lb·in.).

NOTICE:
DO NOT use the high pressure fuel rail feed lines without new P-clips, vibration
dampers and bolts installed.

ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting
battery cables. The magnetic switch studs are at battery voltage.

13. Connect the batteries.
14. Prime the fuel system. Refer to section "Priming of the Fuel System Using ESOC
350 Fuel Priming Pump."
15. Perform the Rail Pressure Bleed-Off test to verify that there are no leaks.
Refer to section "Rail Pressure Bleed-Off Test Using DDDL Two Filter
System "
Refer to section "Fuel Injection System (FIS) Leak Detection (EPA10)."
16. If there are leaks, find the leak and repair, as necessary.

18SP701Rev2 Page 7 of 8

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.
18SP701Rev2 1406 As technical advances continue, specifications will change. Printed in U.S.A.

18SP701Rev2 Page 8 of 8