TUBE AS 1425087 - Caterpillar

Backhoe Loader:
416C (S/N: 1WR1-10493; 1XR1-2249; 4ZN1-22687; 5YN1-16613)
426C (S/N: 1CR1-1804; 1ER1-900; 1MR1-1176; 1NR1-254; 1YR1-2144; 1ZR1-1003; 6XN1-4856; 7WN1-1101)
428C (S/N: 2CR1-19733; 8RN1-5045)
436C (S/N: 1FR1-1419; 1GR1-915; 1PR1-1815; 1RR1-1100; 2AR1-1816; 2BR1-1000; 8TN1-1273; 9JN1-188)
438C (S/N: 1JR1-1149; 1TR1-1887; 2DR1-3480; 9KN1-1282)
A Special Instruction, REHS0973-01, "Installation of New Dual Signal Network to Separate Hydraulic Signal of Loader and Backhoe" is now available. This Special Instruction outlines the basic procedure in order to install a dual signal network that divides the hydraulic signal to the pump. The signal to the pump is divided in order to separate the hydraulic signal to the pump from the backhoe and the loader. The repair procedure will replace the hydraulic lines and the orifices that provide signal pressure to the pump. A shuttle valve is also added in order to regulate the pressure signals to the pump. The new dual signal network will prevent the engine from stalling at low idle.The special instruction is available through the normal distribution system. The publication can also be found on the Caterpillar Service Information System (SIS).