A New Air Pressure Sensor And Configuration Software Needs To Be Installed On 994 Loaders Equipped With VIMS Caterpillar

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.

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI3054" as the Part Number, "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 "PI3054" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

NOTE: This Revised Service Letter replaces the August 27, 1997 Service Letter. Problem, Affected Product, Parts Needed, and Action Required.

Completion Date

Termination Date

Problem

New software for the VIMS needs to be installed on 994 Loaders. The existing software can leave the system inoperable or give inaccurate readings and failure warnings. When installing the new software, an air pressure sensor used to monitor the system air pressure will also need to be changed. The existing sensor is not accurate enough to work correctly with the new softwear.

Affected Product
Model & Identification Number

Group 1

994 (9YF49, 9YF97, 9YF136, 9YF155, 9YF173, 9YF177-194, 9YF196-199, 9YF201, 9YF208)

Group 2

994 (9YF75, 9YF202, 9YF203)

Parts Needed

Dealers will need to order parts for this Program.

1 - 1415746 Sensor Group (required on all)

1 - 1472046 Source Code Software (required on all)

NOTE: Select only one Configuration Software per Affected Product. The machine will need one of the following VIMS configurations depending on languages needed, lift arrangement, and autolube arrangement.

1 - 1533878 Configuration Software (English/Spanish - High Lift)

1 - 1533879 Configuration Software (English/Spanish - Standard Lift)

1 - 1533880 Configuration Software (English/Spanish - High Lift w/o Autolube)

1 - 1533881 Configuration Software (English/Portuguese - High Lift)

1 - 1533882 Configuration Software (English/Portuguese - Standard Lift)

1 - 1533883 Configuration Software (English/Swedish - High Lift)

1 - 1533884 Configuration Software (English/Swedish - Standard Lift)

Action Required

Group 1

The current VIMS air pressure sensor may be inaccurate by 12 to 15 psi. As a result, this can cause the following fault messages to be displayed on the VIMS message center without an actual problem existing:

AUTOLUBE SOL LO

CALL SHOP

SYS AIR PRES LO

ENG MAY NOT START

SYS AIR PRES LO

CALL SHOP

A new more accurate air pressure sensor is available. This sensor requires the use of new VIMS source code and configuration software for the sensor to be read properly by VIMS.

NOTE: This upgrade must also be performed for future VIMS software to be compatible.

Group 2

The current VIMS configuration software has the autolube pressure warning limit set to high. This warning limit is used to determine if the autolube system is reaching a high enough pressure during the lube cycle to discharge grease from the autolube injectors. The current limit is set at 2735 psi. and needs to be set at 2300 psi. As a result, the current configuration software can cause the following message to be displayed in the VIMS message center without an actual problem existing:

AUTOLUBE SOL LO

CALL SHOP

AUTOLUBE LO

CALL SHOP

New VIMS configuration software is available. This new configuration software requires the use of the new air pressure sensor described in Group 1 above. Replace current 100-4311 VIMS air pressure sensor with the new 141-5746 sensor. The VIMS air pressure sensor is located under the throttle pedal. See Illustration 1. Upload the VIMS source code and configuration software as outlined in the VIMS Service Manual (SENR6059). The VIMS-PC service tool needs to be version 2.3 or higher.

NOTE: This upgrade must also be performed for future VIMS software to be compatible.

Illustration 1

Owner Notification

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

Service Claim Allowances

NOTE: This is a 1-hour job.

NOTE: U.S. and Canadian Dealers Only - Eligible dealers may enter a Type 2 SIMS Report.

Parts Disposition

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

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

Attach.

(1-Owner Notification)

Copy Of Owner Notification For U.S. And Canadian Owners