COUPLING ASSEM. 6V9957 - Caterpillar

Track-Type Tractor:
D3K LGP (S/N: JTD1-UP)
D3K XL (S/N: FFF1-UP)
D3K LGP (S/N: LLL1-UP)
D4K XL (S/N: MMM1-UP)
D4K LGP (S/N: RRR1-UP)
D5K LGP (S/N: JLF1-UP)
D5K XL (S/N: WWW1-UP)
D5K LGP (S/N: YYY1-UP)
Description of Change: New machine software is now available for certain D3K, D4K, and D5K Track-Type Tractors. The software provides the following improvements to machine function:
Improved accuracy of the hydrostatic motor speed sensor
Updated Accugrade valve calibration functionality to provide improved blade control performance when using Accugrade laser and GPS
Blade shake functionality is now compatible with the Accugrade software enabled attachments in certain situations. The machine ECM will automatically detect if any Accugrade components are plugged into the Accugrade connectors on the radiator guard. If any blade mounted components are connected, blade shake is disabled. If blade mounted components are not connected, blade shake will function.Note: Improvements to Accugrade systems are only applicable to machines with Accugrade software enabled attachments.Adaptable To: The new 390-1250 Machine Software Gp is adaptable to the following machines:
D3K (S/N: JTD1-175; FFF1-825; LLL1-1205)
D4K (S/N: MMM1-840; RRR1-641)
D5K (S/N: JLF1-286; WWW1-1729; YYY1-1663)The new 390-1250 Machine Software Gp is effective with the following machines:
D3K (S/N: JTD176-UP; FFF826-UP; LLL1206-UP)
D4K (S/N: MMM841-UP; RRR642-UP)
D5K (S/N: JLF286-UP; WWW1729-UP; YYY1663-UP)