2008/02/25 Caterpillar

Excavator:

Large Excavators 345B-385B, and 5090B

All 300C Family Excavators

Service Magazine SEPD0884, 16 April 2007, "Improved Solenoid Valve Groups Are Available". Disregard this article. See the article that follows.

The improved 111-9916 Solenoid Valve Gp is available. The proportional solenoid valve is typically used for the control of the power shift system and in the tool control system.

The improved 121-1491 Solenoid Valve Gp is also available. The on/off solenoid valve is typically used for the hydraulic lockout valve, in the swing brake circuit, in the travel speed circuit, and in the tool control system.

Water was contaminating the former valves. The moisture would cause the valves to malfunction. The improved valves are produced in a redesigned mold. The redesigned mold prevents water contamination in the valve.

Replace the former valves with the improved valves if the valve malfunctions in the field. The improved valves are identified by code letters and a label. Refer to Illustration 1.

Illustration 1	g01308519
Typical Solenoid Valve Gp (A) Code letters for identification (C) Label for identification