New Engine Software and Aftertreatment Software are Now Used for 797F Tier 4 Off-Highway Trucks {1920, 7620} Caterpillar

Off-Highway Truck/Tractor

797F (S/N: LTZ1-155)

Description Of Change:

Note: The new engine and aftertreatment software must be paired together as a set to ensure proper functionality of all features.

The new aftertreatment software has the following improvements:

• Improved software logic for the NOx sensors in cold ambient temperatures to avoid false trips of low DEF quality events.

• Improved software logic for DEF quality detection to avoid false trips of low DEF quality events.

• Improvements to the Aftertreatment System Functional Test (ASFT) to allow a higher time to heal a level 2 and level 3 inducement.

• Improvements to the DEF deposit maps to allow DEF dosing at certain machine operating conditions.

Adaptable To: The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.

Show/hide table

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.