1998/03/16 Caterpillar


New Parking Brake Control Valve Available{4265,4282}

Usage:


814F (9DM),
824G (4SN) Wheel Tractors, 815F (1GN),
825G (6RN) Soil Compactors, 816F (5FN),
826G (7LN) Landfill Compactors

Reference: Service Manual Module, SENR1318, Disassembly & Assembly, 814F Wheel Tractor, 815F Soil Compactor & 816F Landfill Compactor, Machine Systems; Pages 65-66, "Remove and Install Parking Brake Valve." This module is found in Service Manual, SENR1305, 814F Wheel Tractor, 815F Soil Compactor, 816F Landfill Compactor.

Reference: Service Manual Module, SENR1338, Disassembly & Assembly, 824G Wheel Tractor, 825G Soil Compactor & 826G Landfill Compactor, Machine Systems; Pages 118-119, "Remove and Install Parking Brake Valve." This module is found in Service Manual, SENR1325, 824G Wheel Tractor, 825G Soil Compactor, 826G Landfill Compactor.

Description of Change: A new parking brake control valve is available for the machines listed. This new control valve eliminates the need for the use of a pressure spool for the parking brake. Refer to the following illustration and tables for components of the new brake control valve.

Adaptable To: The new 106-1774 Brake Valve Group replaces the former 100-8941 Brake Valve Group (not canceled). The new brake valve is adaptable to first production for the machines listed by following the installation procedure in the Reference for your machine. This new brake valve group is effective with the serial numbers in the following table.


Illustration 1.
106-1774 Parking Brake Control Valve (shown in the engaged position)

(1) Pressure port from brake accumulators.
(2) Parking brake control knob stem.
(3) Return to tank port.
(4) Parking brake actuator port.
(5) Plug.
(6) Spring.

Caterpillar Information System:

1998/03/16 Improved Solenoid Valve Group Used In ICM And Planetary Transmissions For Increased Reliability And Longer Service Life{3030}
1998/03/16 Water Coolant Hose Made Of Improved Material To Increase Service Life{1380}
1998/03/16 Machines Shipped With Improved Hydraulic Oil Filters{5068}
1998/03/16 Correct Service Interval For Water Separator{1251,1280}
1998/03/16 Improved All Wheel Drive (AWD) Switch Assembly Used In Production{1429}
1998/03/16 Auxiliary Equipment Mounting Location Now Provided{1408}
1998/03/16 New Articulation Indicator And Sender{4806}
1998/03/09 Use 134-5195 Adapter Cable For T-harness In Electronic Control Systems{1900,0781}
1998/03/09 New Hardened Washer Improves Seat Suspension Service Life{7324}
1998/03/09 Telehandler Axles And Final Drives{3260,4074}
1998/03/09 Use FT-2512 Threaded Rod To Remove And Install Boom Section Wear Pads, FT-2513 Extended Hex Wrench To Disassemble And Assemble Underblock Pin{6460,6460,0745}
1998/03/09 Use FT-2504 Brake Gauge For Inspecting Brake Disc Wear{0763,4255}
1998/03/16 Correction To Service Manual Module, SENR5956-01, Specifications, Systems Operation, Testing & Adjusting, 938F Wheel Loader And IT38F Integrated Toolcarrier Traction Control System{0374}
1998/03/16 New Tightening Procedure For 129-0987 Drain Assembly{3001,3002,3030,3101,3159,5056}
1998/03/16 New Torque Converter Inlet Relief Valve Now Used{3133}
1998/03/16 New Bank Valves (Implement Control) Prevent Lift Cylinder Voiding{5051}
1998/03/16 Procedure For Keeping Boom Pads Tight{6460}
1998/03/16 Improved Telehandler Electrical System Requires New Fuses{1609,1417}
1998/03/23 Service Magazine Special Edition, SEPD0392, Available{0374}
1998/03/23 Use 143-7145 Lifting Bracket To Remove And Install Cast Driver{0632}
1998/03/23 Bezel Prevents Inadvertent Seat Adjustment{7312,7324}
1998/03/23 Use 143-7597 Differential Lifting Bracket To Remove Differential Assembly{3258}
1998/03/23 Use 139-7050 For Initial Pressure Adjustment Procedure{3150}
1998/03/23 Improved Door Handles And Latches Improve Operation{7308}
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