SOFTWARE GP-MONITOR 3844019 - Caterpillar

Agricultural Tractors:
Challenger 65C (S/N: 2ZJ1-1964)
Challenger 70C (S/N: 2YL1-UP)
Challenger 75C (S/N: 4KK1-UP)
Challenger 85C (S/N: 9TK1-UP)
Challenger 65D (S/N: 2ZJ1965-UP)
Challenger 75D (S/N: 5AR1-UP)
Challenger 85D (S/N: 4GR1-UP)
Challenger 65E (S/N: 6GS1-UP)
Challenger 75E (S/N: 6HS1-UP)
Challenger 85E (S/N: 6JS1-UP)
Challenger 95E (S/N: 6KS1-UP)
Service Magazine SEPD0499, 11 November 1999, "New Pressure Sender (Engine Oil) Improves Operation O+f Engine Oil Pressure Gauge". There is an error in the title of the referenced article. Disregard the former article. See the following article.Description of Change: There have been numerous reports of erratic readings on the engine oil pressure gauge. A new pressure sender (engine oil) is now available.Adaptable To: The new 173-6519 Pressure Sender (engine oil) is a direct replacement for the former 114-6663 Sender (engine oil). The improved design was effective with Challenger 65E (S/N: 6GS542), Challenger 75E (S/N: 6HS546), Challenger 85E (S/N: 6JS567), and Challenger 95E (S/N: 6KS766) Agricultural Tractors.