PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE COOLING PACKAGE AND ADJUSTING THE HYDRAULIC FAN SYSTEM ON CERTAIN D8T AND D9T TRACK-TYPE TRACTORS EQUIPPED WITH WASTE HANDLING OR WOODCHIP ARRANGEMENTS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE COOLING PACKAGE AND ADJUSTING THE HYDRAULIC FAN SYSTEM ON CERTAIN D8T AND D9T TRACK-TYPE TRACTORS EQUIPPED WITH WASTE HANDLING OR WOODCHIP ARRANGEMENTS

Usage:

REBE2917-00

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25Jan2008

U-47

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE COOLING PACKAGE AND ADJUSTING THE HYDRAULIC FAN SYSTEM ON CERTAIN D8T AND D9T TRACK-TYPE TRACTORS EQUIPPED WITH WASTE HANDLING OR WOODCHIP ARRANGEMENTS
1374 1063 1353 6925		PI31438

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31438" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31438" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

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NOTE:

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

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COMPLETION DATE	TERMINATION DATE
31Jul2008	31Jan2009

PROBLEM

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Track-Type Tractors working in landfill and woodchip applications require frequent cleaning of cooling cores in order to perform satisfactorily. The hydraulic fan mounted in front of the radiator, and the hydraulic oil cooler mounted behind the radiator, makes cleaning the cooling cores difficult on certain D8T and D9T Track-Type Tractors. Cooling system modifications are needed in order to improve cleanability in woodchip and waste-handling applications.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
D8T	J8B00462, 481, 550-552 KPZ00332, 344, 381, 472, 684, 919, 926

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*****Group 2*****
D9T	RJS00133

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*****Group 3*****
D8T	KPZ00509, 769, 879

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*****Group 4*****
D9T	RJS00258, 679

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
13	1P4278	CLAMP-HOSE
8	3W9139	BOSS
1	5P1465	HOSE (100 CM)
6	6I2431	SEAL
7	6I2435	SPACER
4	6V5185	CLIP-2 PIECE
4	6V5186	CLIP-2 PIECE
3	6V8716	CONNECTOR-SEAL
2	6V9182	ELBOW-FACE SEAL
7	6V9746	SEAL-O RING
1	6V9839	TEE-SWIVEL
5	7M8485	SEAL-O-RING
3	7X7729	WASHER
3	8T3490	NUT-WELD
17	8T4121	WASHER-HARD
2	8T4136	BOLT
2	8T4140	BOLT
3	8T4178	BOLT
4	8T4182	BOLT-HEX HEAD
17	8T4195	BOLT
2	8T4196	BOLT
1	9R3761	BOSS
2	9X8257	WASHER
1	0910081	SPACER
4	1064572	HOSE
2	1089372	PLUG
1	1163211	HOSE AS
1	1260747	VALVE GP-BYPASS
5	1634061	CORE AS-RADIATOR
1	2032921	HOSE AS.
2	2089292	BOLT-FLANGE HD
2	2423633	BOSS
2	2530861	FILM-CAT POWER
2	2600215	NUT-WELD
1	3019821	CORE AS-OIL CLR
1	3034426	HOSE AS
1	3037505	BRACKET AS.
1	3052781	HOSE AS
2	3068193	ADAPTER AS.
1	3076507	PLATE AS.
1	3076728	NOZZLE-AIR (PLS ORDER 1 PER SITE)
1	3076748	PLATE
2	3077367	FILM-RDTR CLEANI
2	3087280	COVER AS.
1	3101512	SPIDER AS.-FAN
1	3117135	PLATE AS.
1	SEBU7763	OMM
In Order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
*****Group 2*****
12	1P4278	CLAMP-HOSE
1	1W8793	SPACER
1	3J1907	SEAL-O-RING
1	3J7354	SEAL-O-RING
1	3W2647	SPACER
12	3W9139	BOSS
4	4L6454	BOLT
3	4L9337	BOLT
7	5K9090	SEAL-O RING
2	5M3062	BOLT
1	5P1075	WASHER-HARD
1	5P1465	HOSE (100 CM)
1	5P9617	ADAPTER-STR THD
1	6C6766	HOSE AS
7	6I2431	SEAL
9	6I2435	SPACER
2	6V8635	CONNECTOR-SEAL
1	6V8785	TEE-FACE SEAL
1	6V9005	ELBOW-45 (DEG)
2	7D7233	CLIP
2	7K1181	STRAP-CABLE
6	7M8485	SEAL-O-RING
1	7X2540	BOLT
6	7X7729	WASHER
1	8C3446	VALVE-SAMPLING
1	8C3451	CAP-DUST
1	8T1674	TEE-SPL
1	8T2501	BOLT
4	8T2502	BOLT
5	8T4121	WASHER-HARD
2	8T4133	NUT
2	8T4136	BOLT
3	8T4137	BOLT
3	8T4178	BOLT
1	8T4194	BOLT
1	8T4195	BOLT
2	8T4196	BOLT
1	8T4223	WASHER-HARD
1	8T4224	WASHER-HARD
8	8T4896	WASHER-HARD
1	8Y3795	BOSS
1	9B7237	BOLT
1	9G8661	SPACER
1	9Y7595	SPACER
5	1064572	HOSE
2	1089372	PLUG
1	1117421	CAP
1	1159564	HOSE AS.
1	1260747	VALVE GP-BYPASS
1	1744599	FILM-STRIPE
1	1744600	FILM-STRIPE
1	1882501	PLATE AS
2	2089292	BOLT-FLANGE HD
1	2152432	CONNECTOR-STOR
2	2423633	BOSS
6	2562090	CORE AS-RAD
1	2877846	BRACKET AS
1	3019821	CORE AS-OIL CLR
1	3028184	SUPPORT AS.
1	3028185	SUPPORT AS.
1	3028442	HOSE AS
1	3028443	HOSE AS
1	3067418	GUARD
1	3067599	BAR
2	3068193	ADAPTER AS.
1	3069227	BRACKET
1	3076728	NOZZLE-AIR (PLS ORDER 1 PER SITE)
1	3076748	PLATE
2	3077367	FILM-RDTR CLEANI
1	3082947	BAFFLE AS-RH
2	3087280	COVER AS.
1	3090877	BAFFLE AS-LH
1	3107116	SPIDER AS.-FAN
1	SEBU7765	OMM
In Order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
*****Group 3*****
13	1P4278	CLAMP-HOSE
8	3W9139	BOSS
1	5P1465	HOSE (100 CM)
6	6I2431	SEAL
7	6I2435	SPACER
4	6V9746	SEAL-O RING
2	7M8485	SEAL-O-RING
2	7X7729	WASHER
6	8T4121	WASHER-HARD
2	8T4140	BOLT
4	8T4182	BOLT-HEX HEAD
4	8T4195	BOLT
2	9X8257	WASHER
4	1064572	HOSE
2	1089372	PLUG
5	1634061	CORE AS-RADIATOR
2	2089292	BOLT-FLANGE HD
2	2423633	BOSS
2	2530861	FILM-CAT POWER
2	2600215	NUT-WELD
2	3068193	ADAPTER AS.
1	3076507	PLATE AS.
1	3076728	NOZZLE-AIR (PLS ORDER 1 PER SITE)
1	3076748	PLATE
2	3077367	FILM-RDTR CLEANI
2	3087280	COVER AS.
1	3101512	SPIDER AS.-FAN
1	3117135	PLATE AS.
1	SEBU7763	OMM
In Order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
*****Group 4*****
12	1P4278	CLAMP-HOSE
12	3W9139	BOSS
1	5P1465	HOSE (100 CM)
7	6I2431	SEAL
9	6I2435	SPACER
2	7X7729	WASHER
2	8T4133	NUT
2	8T4136	BOLT
2	8T4195	BOLT
9	1064572	HOSE
2	1089372	PLUG
1	1744599	FILM-STRIPE
1	1744600	FILM-STRIPE
2	2089292	BOLT-FLANGE HD
2	2423633	BOSS
6	2562090	CORE AS-RAD
2	3068193	ADAPTER AS.
1	3076728	NOZZLE-AIR (PLS ORDER 1 PER SITE)
1	3076748	PLATE
2	3077367	FILM-RDTR CLEANI
1	3082947	BAFFLE AS-RH
2	3087280	COVER AS.
1	3090877	BAFFLE AS-LH
1	3107116	SPIDER AS.-FAN
1	SEBU7765	OMM
In Order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.

ACTION REQUIRED

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Update these tractors, which were used to test the single plane of cooling cores concept, to the current production design. Also update tractors converted to the waste handling/woodchip arrangements. This will require a new increased pitch fan to increase airflow, the addition of cleaning slots in the radiator guard, and a new air wand to utilize these slots. New engine and Advisor software, which improves the functionality of the reversing fan, may be required. Refer to the attached rework procedure.

NOTE: Contact your Track-Type Tractor Product analyst at (309) 675-0628, (309) 494-0886, or (309) 494-0887 concerning the parts disposition of the 163-4061 and 256-2090 Radiator Core Assemblies before implementing this program.

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OWNER NOTIFICATION

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U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 1*****
100%	100%	0%	0%	0%	0%

NOTE: This is a 52.0-hour job for Group 1

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 2*****
100%	100%	0%	0%	0%	0%

NOTE: This is a 52.0-hour job for Group 2

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 3*****
100%	100%	0%	0%	0%	0%

NOTE: This is a 52.0-hour job for Group 3

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
*****Group 4*****
100%	100%	0%	0%	0%	0%

NOTE: This is a 52.0-hour job for Group 4

PARTS DISPOSITION

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE COOLING PACKAGE AND ADJUSTING THE HYDRAULIC FAN SYSTEM ON CERTAIN D8T AND D9T TRACK-TYPE TRACTORS EQUIPPED WITH WASTE HANDLING OR WOODCHIP ARRANGEMENTS

MODELS INVOLVED - D8T and D9T Track-Type Tractors

Dear Caterpillar Product Owner:

Track-Type Tractors working in landfill and woodchip applications require frequent cleaning of cooling cores in order to perform satisfactorily. The hydraulic fan mounted in front of the radiator, and the hydraulic oil cooler mounted behind the radiator, makes cleaning the cooling cores difficult on the products listed below. Cooling system modifications are needed in order to improve cleanability in woodchip and waste-handling applications. These modifications include:

1) Replacement of the standard hydraulic oil cooler with an in-line cooler, eliminating the dual-plane of cores to increase access to the cooling package and simplify cleaning.

2) Addition of clean-out slots in each side of the radiator guard to facilitate cleaning with an air wand. A new air wand will be provided to utilize these slots. These wands are custom-built for these tractors and may require some plumbing changes in the cleaning station at each individual site. These slots and wand will allow for access to the front of the cooling package and simplify cleaning.

3) A new fan will be installed. This fan features a greater blade pitch and increases airflow in both the forward and reverse (purge) directions. This new fan will improve the systems? capability to ?clean itself?.

4) New engine and Advisor software will be installed to:

a. Optimize the transition time between forward and reverse (purge) fan direction, allowing us to maximize both cooling and cleaning capability.

b. Enable flexibility of purge operations

i. Automatic purge cancellation option - the purge cycle is automatically cancelled when the tractor is shifted into forward gear. This allows an option to keep debris away from the fan when the fan is turning in reverse.

ii. Indefinite purge option ? with the parking brake engaged, holding the purge switch down for 3 seconds enables an indefinite purge, providing options and enhancements to aid in cleaning the cores.

iii. A purge indicator on the Advisor panel lets the operator know when the purge cycle is in progress, allowing the operator to know when a purge is active and modify any operations as necessary.

iv. An increase in the programmable range for the purge cycle duration for fine-tuning the cleaning capability. This provides more flexibility to sites with unique situations that require longer purge cycles.

c. Provide automatic zero-calibration for the fan pump pressure sensor

5) A new Operation and Maintenance Manual is provided to give guidance in cleaning procedures and provide instruction on reversing fan operation.

Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

Please refer the dealer to their Service Letter dated 25Jan2008 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.

Caterpillar Inc.

Identification #(s)

Attached to 25Jan2008 Service Letter

Rework Procedure

Group Number 1

This rework program is essentially providing a ?new? cleaning system for our customers with the waste/woodchip attachments. To help monitor the effectiveness of these cleaning system enhancements, take special note to record data and download files required by steps 4, 6, 9 and 10 below.

1) Review and perform the applicable Special Instruction (see image 1.1.1) for installation of the Hydraulic Oil Cooler Core, Clean-out Slots and Fan.

Image1.1.1

NOTE: The cover on the slot adapter on the side of the radiator guard should rotate freely. If it does not, disassemble and clean any overspray from the inside bore around the bushing. Reassemble and verify the cover rotates freely.

2) Ensure that the site management, operators, and on-site maintenance personnel have an understanding of the cooling core cleaning recommendations, air wand use in the clean out slots, and reversing fan operations as presented in the new Operation and Maintenance Manual (SEBU7763-02 for D8T and SEBU7765-02 for D9T). See "Wood Chip or Waste Handling Arrangement (if equipped)" in the "Cooler Cores and A/C Condenser - Clean" story in the Maintenance Section of the Operation and Maintenance Manual. See "Engine Reverse Fan (if equipped) in the "Operator Controls" story in the Operations Section of the Operation and Maintenance Manual. Also refer to the section at the end of this letter titled 'OWNER NOTIFICATION INFORMATION' for additional guidance.

NOTE: Please ensure understanding of the following two items:
a. The engine must be stopped before engaging the wand in the slot in the radiator guard
b. Airflow to the wand should not be actuated until the wand is fully engaged in the slot in the radiator guard.

3) Update the engine and advisor software to the part numbers listed as shown in Image 1.2.1

NOTE: Once the Advisor software is flashed in the Advisor ECM, the operator profiles programmed by the customer and the service password will be deleted. Please document the profiles and re-program them after the flashing is complete. Also, using Caterpillar ET, please set the Advisor Service Password to the last four digits of the tractor serial number. For example, tractor serial number RJS00405 would have a service password of 0405. Information on programming the profiles can be found in the Operation and Maintenance Manual.

Image1.2.1

This software includes the following features to assist in maintaining cleanliness of the cooling package:

a. Optimize the transition time between forward and reverse (purge)
b. Flexibility of purge options
i. Automatic purge cancellation option (requires ET Version 2007B) - the purge cycle is automatically cancelled when the tractor is shifted into forward gear.
ii. Indefinite purge option ? with the parking brake engaged, holding the purge switch down for 3 seconds enables an indefinite purge
iii. Purge indicator on the Advisor panel lets the operator know when the purge cycle is in progress
iv. An increase in the programmable range for purge cycle duration
c. Automatic zero-calibration for fan pump pressure sensor

4) Record fan high-pressure cut-off settings. Use the zero-percent override in ET to obtain the initial fan cut-off pressure.

Obtaining high pressure cut-off settings
. Hydraulic oil temperature should be warmed to 65 +/- 3 degrees C (150 +/- 5 degrees F)
. Set the engine speed to high idle
. Using the override feature in ET, program the fan bypass solenoid override to 0%
. Record the fan pressure from the ET override screen or the status screen in Advisor

5) Adjust the high-pressure cutoff setting of the fan compensator valve. This step is very critical to maintaining the proper airflow through the cooling package and keeping the package clean. Detailed instructions are available in the following documents in SIS. Note that the high-pressure cut-off settings have changed. Use the new setting shown in the table in Image 1.3.1

Image1.3.1

6) Record the final, adjusted fan high pressure cut-off settings

7) Use ET to set fan pump clip pressure in the Engine Software Configuration Group 1, Engine Cooling Fan Maximum (Clip) Pressure. Set the fan pump clip pressure to the values shown in Image 1.4.1. For the D8T, do not use the fan speed calibration method given in the service manuals.

Image1.4.1

8) Set the purge cycle interval and duration of the run. Cycle interval represents how often the purge cycle will be automatically activated when the tractor is in reverse or sitting with the parking brake released. Duration represents how long the purge cycle will run when it is automatically activated.

The factory setting for fan purge cycle duration is 25 seconds and cycle interval is 20 minutes. Please note that there may be factors at an individual site which call for a more frequent cycle interval or longer purge duration. Please work with the on-site personnel to determine optimum settings. With this new software release, the maximum duration setting is now 60 seconds.

9) After completing steps 1-8, obtain a prognostic download, configuration, and shift count matrix from each tractor. Obtaining the data in the following steps will help ensure the viability of this cleaning system by establishing a baseline from which we can measure future progress. Following this rework, we are essentially providing a ?new? cleaning system and the download data will ensure we are meeting our targets. To do so:

Obtaining a Prognostics Download
. Ensure you have the newest version of ET available (or at least 2006B)
. From the ET main menu, select "file"/"select ECM"/"engine" (or "powertrain" or "implement", which gives the same information in a different order)
. Also from the ET main menu, select "information"/"prognostic download" (all the available parameters are already selected)
. Click on the button at the bottom of the screen labeled "load from ECM" (this should take about three minutes or so)
. Click on the last button at the bottom of the screen labeled "save to file" (this should automatically choose the *.txt format)
. A popup window will prompt for a location and file name (save it to your hard drive)
. The prognostic download file is relatively small, less than 100KByte.

Obtaining a Configuration Download
. Ensure you have the newest version of ET available (or at least 2006B)
. From the ET main menu, select "file"/"select ECM"/"engine"
. Also from the ET main menu, select "service"/"configuration"
. Click on the "Expand All" button on the bottom of the screen
. From the ET main menu, select "file"/"print to file"
. Change the file type from .XML to .HTML, and save the file to your hard drive

Obtaining a Shift Count Matrix
. Ensure you have the newest version of ET available (or at least 2006B)
. From the ET main menu, select "file"/"select ECM"/"powertrain"
. Also from the ET main menu, select "diagnostics"/"events"/"shift count matrix"
. From the ET main menu, select "file"/"print to file"
. Change the file type from .XML to .HTML, and save the file to your hard drive

10) Turn each file obtained in step 9, as well as the fan cut-off settings recorded in steps 4 and 6, in to your Warranty Department.

. Warranty Department ? upload these files to SIMSi when you file this claim. You should have three files plus two numerical values to upload.

OWNER NOTIFICATION INFORMATION

Track Type Tractors working in landfill and woodchip applications require frequent cleaning of cooling cores in order to perform satisfactorily. The hydraulic fan mounted in front of the radiator, and the hydraulic oil cooler mounted behind the radiator, makes cleaning the cooling cores difficult on certain D8T and D9T Track Type Tractors. Cooling system modifications are needed in order to improve cleanability in woodchip and waste-handling applications. These modifications include:

1) Replacement of the standard hydraulic oil cooler with an in-line cooler, eliminating the dual-plane of cores to increase access to the cooling package and simplify cleaning.

2) Addition of clean-out slots in each side of the radiator guard to facilitate cleaning with an air wand. A new air wand will be provided to utilize these slots. These wands are custom-built for these tractors and may require some plumbing changes in the cleaning station at each individual site. These slots and wand will allow for access to the front of the cooling package and simplify cleaning.

3) A new fan will be installed. This fan features a greater blade pitch and increases airflow in both the forward and reverse (purge) directions. This new fan will improve the systems? capability to ?clean itself?.

4) New engine and Advisor software will be installed to:

a. Optimize the transition time between forward and reverse (purge) fan direction, allowing us to maximize both cooling and cleaning capability.

b. Enable flexibility of purge operations

i. Automatic purge cancellation option - the purge cycle is automatically cancelled when the tractor is shifted into forward gear. This allows an option to keep debris away from the fan when the fan is turning in reverse.

ii. Indefinite purge option ? with the parking brake engaged, holding the purge switch down for 3 seconds enables an indefinite purge, providing options and enhancements to aid in cleaning the cores.

iii. A purge indicator on the Advisor panel lets the operator know when the purge cycle is in progress, allowing the operator to know when a purge is active and modify any operations as necessary.

iv. An increase in the programmable range for the purge cycle duration for fine-tuning the cleaning capability. This provides more flexibility to sites with unique situations that require longer purge cycles.

c. Provide automatic zero-calibration for the fan pump pressure sensor

5) A new Operation and Maintenance Manual is provided to give guidance in cleaning procedures and provide instruction on reversing fan operation.

Group Number 2

This rework program is essentially providing a ?new? cleaning system for our customers with the waste/woodchip attachments. To help monitor the effectiveness of these cleaning system enhancements, take special note to record data and download files required by steps 4, 6, 9 and 10 below.

1) Review and perform the applicable Special Instruction (see image 2.1.1) for installation of the Hydraulic Oil Cooler Core, Clean-out Slots and Fan.

Image2.1.1

NOTE: The cover on the slot adapter on the side of the radiator guard should rotate freely. If it does not, disassemble and clean any overspray from the inside bore around the bushing. Reassemble and verify the cover rotates freely.

2) Ensure that the site management, operators, and on-site maintenance personnel have an understanding of the cooling core cleaning recommendations, air wand use in the clean out slots, and reversing fan operations as presented in the new Operation and Maintenance Manual (SEBU7763-02 for D8T and SEBU7765-02 for D9T). See "Wood Chip or Waste Handling Arrangement (if equipped)" in the "Cooler Cores and A/C Condenser - Clean" story in the Maintenance Section of the Operation and Maintenance Manual. See "Engine Reverse Fan (if equipped) in the "Operator Controls" story in the Operations Section of the Operation and Maintenance Manual. Also refer to the section at the end of this letter titled 'OWNER NOTIFICATION INFORMATION' for additional guidance.

NOTE: Please ensure understanding of the following two items:
a. The engine must be stopped before engaging the wand in the slot in the radiator guard
b. Airflow to the wand should not be actuated until the wand is fully engaged in the slot in the radiator guard.

3) Update the engine and advisor software to the part numbers listed as shown in Image 2.2.1

NOTE: Once the Advisor software is flashed in the Advisor ECM, the operator profiles programmed by the customer and the service password will be deleted. Please document the profiles and re-program them after the flashing is complete. Also, using Caterpillar ET, please set the Advisor Service Password to the last four digits of the tractor serial number. For example, tractor serial number RJS00405 would have a service password of 0405. Information on programming the profiles can be found in the Operation and Maintenance Manual.

Image2.2.1

This software includes the following features to assist in maintaining cleanliness of the cooling package:

a. Optimize the transition time between forward and reverse (purge)
b. Flexibility of purge options
i. Automatic purge cancellation option (requires ET Version 2007B) - the purge cycle is automatically cancelled when the tractor is shifted into forward gear.
ii. Indefinite purge option ? with the parking brake engaged, holding the purge switch down for 3 seconds enables an indefinite purge
iii. Purge indicator on the Advisor panel lets the operator know when the purge cycle is in progress
iv. An increase in the programmable range for purge cycle duration
c. Automatic zero-calibration for fan pump pressure sensor

4) Record fan high-pressure cut-off settings. Use the zero-percent override in ET to obtain the initial fan cut-off pressure.

Obtaining high pressure cut-off settings
. Hydraulic oil temperature should be warmed to 65 +/- 3 degrees C (150 +/- 5 degrees F)
. Set the engine speed to high idle
. Using the override feature in ET, program the fan bypass solenoid override to 0%
. Record the fan pressure from the ET override screen or the status screen in Advisor

5) Adjust the high-pressure cutoff setting of the fan compensator valve. This step is very critical to maintaining the proper airflow through the cooling package and keeping the package clean. Detailed instructions are available in the following documents in SIS. Note that the high-pressure cut-off settings have changed. If not previously completed, perform PI31431 (Product Improvement Program for Reworking the Fan Pump Control Valve on Certain D8T, D9T and D10T Track-Type Tractors.) Note that the tractor should have a 26 degree blade pitch reversing fan (part number 310-7116.)Use the new setting shown in the table in Image 2.3.1

Image2.3.1

Image2.4.1

Group Number 3

Tractors in this group received a partial update for field test in December 2006. The fan will be replaced with a new 26 degree pitch fan, clean out slots and covers which accept an air wand will be installed in the radiator guard, the cooling core side baffles will be relocated, the front grab handle on the right side will be relocated, a spacer bracket assembly will be installed above the hydraulic cooler bypass valve, and the AMOCS cores will be replaced with new.

Reference Special Instruction REHS3314 ?Installation of cleaning slots, the hydraulic cooler core, and a 26 degree fan on the waste disposal arrangement and the wood chip arrangement on a D8T.? Perform the applicable portions of REHS3314 in order to complete the full production update. The applicable steps to be completed are outlined below for each section of REHS3314.

Removal of Parts section of REHS3314
1. Perform steps 1-12.
2. Perform steps 16 & 17. Note: Protect the top surface of the radiator bottom tank and cover the holes for the seals.
3. Disconnect 303-4426 Hose As (15), 305-2781 Hose As (20), and 116-3211 Hose As (24) from the hydraulic oil cooler. See illustration 30.
4. Unbolt 6V5186 clip (12) and 303-7505 bracket (18) and move hoses aside. See illustration 35.
5. Remove two 8T4196 bolts (2) and the 301-9821 oil cooler (1). See illustration 34.
6. Thoroughly clean the hydraulic oil cooler core (1). Refer to Operation and Maintenance Manual, SEBU7763, ?Cooler Cores and A/C Condenser ? Clean? for the correct procedure.
7. Perform steps 18-25.

Installation of the Slot in the Radiator Guard section of REHS3314
1. Perform all steps (pages 10-22).

Rework the Bottom Radiator Tank, the Baffle, and the Bottom of the Radiator Guard section of REHS3314
1.Remove three 8T4178 bolts (14) and allow the 126-0747 Bypass Valve Gp (7) to hang out of the way. See illustration 37.
2. Perform steps 4 & 5 to create new hole pattern in radiator guard bottom plate.

Install the Bottom Radiator Tank, the Baffles, and the Fan section of REHS3314
1.Perform steps 3-8.

Install the Hydraulic Cooler Core section of REHS3314
1. Perform steps 10 & 11. Use existing hardware for step 10.
2. Reinstall the hydraulic oil cooler core (1). Use new O-ring seals (22) and (23) as required for loosened connections. Use existing hardware. Refer to steps 1-4.
3. Perform steps 5 & 6. Use existing hardware.
4. Perform steps 15 & 21.

Reinstall Parts section of REHS3314
1. Perform steps 1-8.
2. Perform steps 10-14.
3. Perform steps 17-24.

Install the Adaptor Covers, the Grab Handle, and the Films
Perform steps 1-6.

Reference the Rework Procedure for Group Number 1 in this Service Letter.
Perform steps 2-10.

Group Number 4

Tractors in this group received a partial update for field test in December 2006. The fan will be replaced with a new 26 degree pitch fan, clean out slots and covers which accept an air wand will be installed in the radiator guard, the cooling core side baffles will be relocated and the AMOCS cores will be replaced with new.

Reference Special Instruction REHS3364 ?Installation of the hydraulic cooler core for the waste disposal arrangement on a D9T.? Perform the applicable portions of REHS3364 in order to complete the full production update. The applicable steps to be completed are outlined below for each section of REHS3364.

Removal of Parts section of REHS3364

1. Perform steps 1-4.
2. Perform steps 7-12.
3. Disconnect 302-8442 Hose As (15) and 115-9564 Hose As (14) from the hydraulic oil cooler. See illustration 42.
4. Remove two 5M-3062 bolts (10) and the 301-9821 oil cooler (1). See illustration 36.
5. Thoroughly clean the hydraulic oil cooler core (1). Refer to Operation and Maintenance Manual, SEBU7765, ?Cooler Cores and A/C Condenser ? Clean? for the correct procedure.

Modification of the Guard for the D9T section of REHS3364

1. Perform steps 1-13 and 15

Right Hand Slot section of REHS3364

1. Perform steps 1-7 (all)

Left Hand Slot section of REHS3364

1. Perform steps 1-3 (all.)

Installation of the Adapter section of REHS3364

1. Perform steps 1-8 (all.)

Install Parts section of REHS3364

1. Perform steps 1-6. Note, use the new 310-7116 fan spider.
2. Reinstall the hydraulic oil cooler core (1). Use new O-ring seals 5K-9090 (36) and 7M-8485 (37) as required for loosened connections.
3. Perform step 7-40. Note, most of the hydraulic hoses and hardware should already be in place from the previous update. Use these steps for reference as needed.

Installation of Adaptor Covers, the Grab Handle, and the Films section of REHS3364

Perform steps 1-3 (all.)

For the remaining rework, reference the Rework Procedure for Group Number 2 in this Service Letter. Perform steps 2-10.

Note for step 5 in the rework procedure for Group Numbers 2 and 4, perform service letter PI31431 (Product Improvement Program for Reworking the Fan Pump Control Valve on Certain D8T, D9T and D10T Track-Type Tractors). Note that Group Numbers 2 and 4 should both have a 26 degree blade pitch reversing fan (part number 310-7116).