BEARING-THRUST 3042746 - Caterpillar

Illustration 1 g01075576
This module discusses the features and operation of the implement hydraulic system. In addition, the major electrical components and hydraulic components are also discussed. The following Telehandler B-Series Machine is covered in this module:
TH580BHydraulic SystemThe hydraulic system supplies oil flow to the following systems:
Steering
Braking
Power Train
Implements (Including the Boom, Work Tools, Stabilizers and Frame Level)Note: The steering system is described in Steering System, Specifications, Systems Operation, Testing and Adjusting, RENR5189.Note: The braking system is described in Braking System, Specifications, Systems Operation, Testing and Adjusting, RENR5190.Note: The power train system is described in Power Train System, Specifications, Systems Operation, Testing and Adjusting, RENR5185.The implement hydraulic system includes the following features:
Closed center spools in the control valves for the boom extend/retract, boom raise/lower and coupler tilt
Open center spools from cylinder to tank in the control valves for the auxiliary system, stabilizers and frame level
Load sensing
Pressure and flow compensation
Load independent flow division (LIFD)When the flow demand of the implements exceeds the output of the hydraulic pump, the system will reduce flow to each of the active circuits. The flow from each circuit will be reduced by the same percentage of the flow that is commanded.The implement hydraulic system includes the following new enhancements over the TH62, TH63, TH82, TH83 and TH103 range of Telehandlers:
Electronically controlled implement and stabilizer control valves
Simpler load signal systemThe new implement hydraulic system is controlled with electronics. The previous system was pilot controlled.The load signal network on the TH62, TH63, TH82, TH83 and TH103 has changed. The compensators replace the function of the resolver.