SHAFT-SPROCKET 2F7577 - Caterpillar

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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Introduction
The following tests are used to test the modulating valve for the torque converter lockup clutch and the solenoid on this modulating valve.Prior to starting checks on the modulating valve for the torque converter lockup clutch, use Caterpillar ET in order to diagnose any fault codes that may be present. Refer to Systems Operation/Troubleshooting/Testing and Adjusting, KENR8292, "Power Train Electronic Control System".Note: The torque converter lockup clutch is engaged during high engine speeds.Required Tools
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