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SUBJECT

DATE

Fuel System - Fuel Filters

January 2019

Additions, Revisions, or Updates
Publication Number / Title

DDC-SVC-MAN-0205
DDC-SVC-MAN-0190

Platform

Heavy Duty
Euro V
Heavy Duty
GHG17

Section Title

Change

Removal of the Fuel
Prefilter

Replace GHG17 procedure with this one

Inspection of the Fuel
Prefilter

This is a new section

Install of the Fuel
Prefilter

Replace GHG17 procedure with this one

Removal of the
Coalescer/Final Filter

Replace GHG17 procedure with this one

Inspection of the
Coalescer/Final Filter

This is a new section

Install of the Coalescer/
Final Filter

Replace GHG17 procedure with this one

All information subject to change without notice.

01 12-19

Copyright © 2019 DETROIT DIESEL CORPORATION

3

2 Removal of the Fuel Prefilter

2

Removal of the Fuel Prefilter

Remove as follows:
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.

WARNING: PERSONAL INJURY
To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing
any component.
1. Shut off the engine, apply the parking brake, chock the wheels, and perform any other applicable safety steps.
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
2.
3.
4.
5.
6.

4

Disconnect the batteries.
Open the hood.
Using a 36 mm socket, unscrew the prefilter cap.
Pull the cap and prefilter straight up and out of the fuel filter housing.
Remove the prefilter (1) from the prefilter cap (2) by placing the filter on a solid surface and applying pressure on
prefilter cap (2) at an angle.

All information subject to change without notice.

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7. Visually inspect the fuel prefilter for any signs of fuel contamination. If fuel contamination is found, perform the
appropriate troubleshooting. If replacing, discard the prefilter.
8. Inspect inside the housing for any large debris; clean housing as needed.
9. Discard the prefilter cap O-ring.

All information subject to change without notice.

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Copyright © 2019 DETROIT DIESEL CORPORATION

5

3 Inspection of the Fuel Prefilter

3

Inspection of the Fuel Prefilter

Inspect as follows:
1. Visually inspect the threads on the fuel prefilter cap and fuel filter module. If the threads are damaged, replace as
necessary.
2. If the fuel prefilter is not being replaced, visually inspect the filtering element for rips or tears. If any damage to the
filtering element is found, replace the fuel prefilter.
3. If the fuel prefilter is not being replaced, visually inspect the lower filter O-rings for any damage or deformation. If
any damage to the lower filter O-rings is found, replace the fuel prefilter.

6

All information subject to change without notice.

Copyright © 2019 DETROIT DIESEL CORPORATION

01 12-19

01 12-19

4

Installation of the Fuel Prefilter

Install as follows:
NOTE: If a filter service is being performed, replace all other filters before priming.
1. Install a new prefilter cap O-ring onto the prefilter cap.
2. Snap new prefilter into the prefilter cap.
3. Apply a thin coat of petroleum-based lithium grease to the prefilter cap O-ring and the prefilter O-rings (1).

4. Install the prefilter into the fuel filter module.
5. Turn the cap counterclockwise until a click sound is made, then turn clockwise and hand tighten.
6. Torque prefilter cap to 55 to 60 N·m (41 to 44 lb·ft).
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
7. Connect the batteries.
8. Once all required filters have been changed, prime the fuel system. Refer to section "Priming the Fuel System - KM63
GEN2 - Two-Filter System"
9. Close the hood.

All information subject to change without notice.

01 12-19

Copyright © 2019 DETROIT DIESEL CORPORATION

7

5 Removal of the Coalescer/Final Filter

5

Removal of the Coalescer/Final Filter

Remove the water coalescer/final filter as follows:
NOTICE: Do not tilt the water coalescer/final filter when removing it from the housing. Possible damage to the
water coalescer/final filter or stand pipe may occur.
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.

WARNING: PERSONAL INJURY
To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing
any component.
1. Shut off the engine, apply the parking brake, chock the wheels, and perform any other applicable safety steps.
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
2.
3.
4.
5.
6.

8

Disconnect the batteries.
Open the hood.
Using a 36mm socket, unscrew the water coalescer/final filter cap.
Pull the cap and water coalescer/final filter straight up and allow the fuel to drain back.
Remove the water coalescer/final filter (2) from the water coalescer/final filter cap (1) by placing the filter on a solid
surface with the drain back plug location at 12 o'clock (3) and applying pressure on the water coalescer/final filter cap
at an angle.

All information subject to change without notice.

Copyright © 2019 DETROIT DIESEL CORPORATION

01 12-19

01 12-19

7. Visually inspect the coalescer/final filter for any signs of fuel contamination. If fuel contamination is found, perform
the appropriate troubleshooting. If replacing the coalescer/final filter, discard the water coalescer/final filter.
8. Inspect inside the housing for any large debris; clean housing as needed.
9. Discard water coalescer/final filter cap O-ring.

All information subject to change without notice.

01 12-19

Copyright © 2019 DETROIT DIESEL CORPORATION

9

6 Inspection of the Coalescer/Final Filter

6

Inspection of the Coalescer/Final Filter

Inspect as follows:
1. Visually inspect the threads on the coalescer/final filter cap and fuel filter module. If the threads are damaged, replace
as necessary.
2. If the coalescer/final filter is not being replaced, visually inspect the filtering element for rips or tears. If any damage
to the filtering element is found, replace the coalescer/final filter.
3. If the coalescer/final filter is not being replaced, visually inspect the lower filter O-rings for any damage or
deformation. If any damage to the lower filter O-rings is found, replace the coalescer/final filter.

10

All information subject to change without notice.

Copyright © 2019 DETROIT DIESEL CORPORATION

01 12-19

01 12-19

7

Installation of the Coalescer/Final Filter

Install the water coalescer/final filter as follows:
NOTE: If a fuel filter service is being performed, replace all other fuel filters before priming the fuel system.
1. Install a new O-ring onto the water coalescer/final filter cap.
2. Snap water coalescer/final filter into the water coalescer/final filter cap.
3. Apply a light coat of Parker super O-lube or petroleum-based lithium grease to the water coalescer/final filter cap Oring and drain back plug O-ring (C). Apply a heavy coat of Parker super O-lube or petroleum-based lithium grease to
the upper (A) and lower seals (B) on the water coalescer/final filter.

The illustration below shows the proper amount of lubricant to use on the upper and lower seals.

All information subject to change without notice.

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11

7 Installation of the Coalescer/Final Filter

4. Install the water coalescer/final filter into the fuel filter module.
NOTE: Viewing the fuel filter module from the top, the drain back port is located at 10 o'clock.
5. Turn the water coalescer/final filter cap counterclockwise until the drain back plug has located the drain back
port. Apply light pressure to the top of the water coalescer/final filter cap to seat the drain back plug into the drain
back port, hand tighten the filter cap by turning the cap clockwise.
6. Torque water coalescer/final filter cap to 55 to 60 N·m (41 to 44 lb·ft).
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
7. Connect the batteries.
8. Once all required filters have been changed, prime the fuel system. Refer to section "Priming the Fuel System - KM63
GEN2 - Two-Filter System".
9. Close the hood.

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All information subject to change without notice.

Copyright © 2019 DETROIT DIESEL CORPORATION

01 12-19