Case 180, 190, 210, 225 Magnum Tractor Service Repair Manual (SN Z9RH06000 – )

Service Repair Manual: 5305 pages
Operators Manual: 487 pages
Manuals: Service Repair Manual and Operators Manual
Contents
Introduction
Engine
Power Coupling
Transmission
Four Wheel Drive (4WD) System
Rear Axle System
Power Take Off (PTO)
Brakes and Controls
Hydraulic System
Hitches, drawbars and implement couplings
Frames and ballasting
Steering
Wheels
Cab Climate Control
Electrical Systems
Platform, Cab, bodywork and decals
Special Tool Index
Electrical Schematic
Hydraulic Schematic
Manual Extract: Differential lock control valve – Dynamic description
The differential lock valve is part of the Power Take-Off (PTO)/Mechanical Front Drive (MFD)/differential lock valve (1).

Differential lock is controlled with a hydraulically applied clutch. Oil is supplied to the differential lock valve from the regulated supply circuit. Supply flow for the differential lock clutch is distributed internally (no external tubing) to the clutch.

The valve is mounted on top of the rear transmission housing.
The differential lock solenoid (2) is controlled by a button on the Integrated Control Panel (ICP) on the armrest console.

The Armrest Control Unit (ARU) communicates (via the CAN data bus) with the Tractor Control Unit (TCU).The TCU controller supplies current to the differential lock solenoid valve to activate the differential lock clutch based on commands from the operator: the operator can choose manual or automatic differential lock operation. The TCU uses input from the brake pedal switches, true ground speed circuit, hitch position control system, transmission speed signal circuit and the tractor steering angle to engage or disengage differential lock during automatic operation.