Service Bulletin No. 3077
F

MODEL

TYPE

D I E I J Series Coaches
SUBJECT

Service Information

SECTION/GROUP

8-Engine

DATE

~

Dec.21,2012

DIESEL EXHAUST FLUID ( DEF) FILL CAP VENTING

CONDITIONS

Service Information Only

\..
Description:

MCI is notifying our customers at the request of Shaw Development that the diesel exhaust fluid (DEF) tank cap requires
routine cleaning to prevent the potential for crystallization build up at the vent.
The presence of crystallization build up at the vent may result in potential vacuum issues which could result in collapsing
of the tank walls.
MCI customers are instructed to follow the steps and instructions in the attached Shaw Development Technical Bulletin
TB 2472, including observing all warnings and cautions therein every month. In addition , steps should be taken to
ensure that the tank is not over-filled as this may accelerate the potential for crystallization build up in the cap vent.
In the event that the operator notices a vacuum in the DEF tank when removing the cap to fill the tank , the cap should be
cleaned per the steps and instructions in the attached Shaw Development Technical Bulletin TB 2472 as soon as
possible regardless of the one ( 1 ) month preventative maintenance schedule interval.

Qty.

New P/N

Description

a/r

08-20-2206

Cap Assembly, Diesel Exhaust Fluid ( DEF ) Tank , w/o laynard

Procedure complete.

TB-24 72 REV - A

Page 3of12

INDEX OF REVISIONS

REVISION

DESCRIPTION

-

Initial release

A

Included newly revised cap

APPROVED BY/
DATE
CM

JAV
11/16/12

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION, ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights resenied.

TB-2472 REV - A

Page 4of12

TABLE OF CONTENTS
SECT.

DESCRIPTION

PAGE

1.0

INTRODUCTION: ......................................................... .................................... 5

1.1

PURPOSE : ....................................................................................................... 5

2.0

APPLICABLE UNITS: ....................................................................................... 5

3.0

CLEANING CONDITIONS : ............................................................................... 5

4.0

CAP REMOVAL AND REPLACEMENT PROCEDURE : ................................... 6

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION, ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-2472 REV - A

4.0

Page 6 of 12

CAP REMOVAL AND REPLACEMENT PROCEDURE:
1) Wipe off the cap and adapter to prevent any debris from entering the
reservoir. This helps prevent against contamination and possible damage
to the SCR system.

2) Grip the cap and turn counter clockwise unit the cap stops turning.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION, ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. ©2011 Shaw Development, LLC. All rights reseived .

TB-24 72 REV - A

Page 7of12

3) Pull the cap off of the adapter (If the cap has a lanyard, it will still be
attached to the reservoir).
Lanyard Only Caps: Take the lanyard attached to the Lanyard Tab of the
cap and slide it over the tab so that the cap can be removed.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS

THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION , ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-2472 REV -A

Page 8 of 12

4) Place the cap in a bucket of water and allow it to soak for approximately
five (5) minutes.

5) After soaking, grip the cap and shake vigorously whi le underwater to
break up and loose and/or remaining DEF within the cap assembly.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION , ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-2472 REV -A

Page 9of12

6) Shake cap so that any remaining water within the cap assembly is
drained.

7) Blow off cap to remove any retained water, to prevent freezing when
operating in colder climates.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS

THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION, ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-24 72 REV - A

Page 10of12

8) Wipe down the fill port adapter with a damp cloth before replacement of
the cap . Take the cap and replace with the grooves on the cap fitting into
the notches on the fill port adapter.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION, ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-24 72 REV - A

Page 11 of 12

9) Turn the new cap clockwise until it stops.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION , ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 2011 Shaw Development, LLC. All rights reserved .

TB-24 72 REV - A

Page 12of12

Lanyard Only Caps: To re-attach the lanyard, take the small opening of
the lanyard and slide it over the Lanyard Tab of the cap so that it fits into
the groove.

NOTICE OF CONFIDENTIAL INFORMATION AND PROPRIETARY RIGHTS
THIS DOCUMENT MAY NOT BE DISCLOSED TO OTHERS EXCEPT BY EXPRESS WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. THIS DOCUMENT
CONTAINS CONFIDENTIAL COMMERCIAL AND TECHNICAL DATA, CONCEPTS AND OTHER INFORMATION , ALL OF WHICH ARE PROPRIETARY AND OF
ECONOMIC VALUE TO SHAW DEVELOPMENT, LLC. THIS DOCUMENT MAY NOT BE USED FOR MANUFACTURE OR PROCESSING USES ABSENT EXPRESS
WRITTEN PERMISSION OF SHAW DEVELOPMENT, LLC. ANY USE OTHER THAN CONFIDENTIAL EVALUATION IS STRICTLY PROHIBITED WITHOUT THE PRIOR
WRITTEN CONSENT OF SHAW DEVELOPMENT, LLC. © 201 1 Shaw Development, LLC. All rights reserved .