1999/06/28 Caterpillar


New Swing Control Valve Prevents Swing Drift {5454,5480}

Usage:


416C (4ZN, 5YN, 1WR, 1XR),
426C (6XN, 7WN, 1CR, 1MR, 1YR, 1ZR),
428C (2CR, 8NR),
428B (7EJ),
436C (8TN, 1FR, 1PR, 1RR, 2AR, 2BR),
438C (9KN, 1JR, 1TR, 2DR),
438B (3KK) Backhoe Loaders

Description of Change: New 148-6516 Control Valve (Swing) (A) replaced former 127-5678 Control Valve (Swing) (B).

Changes to the control valve stem, at the ball-check passages, assure correct ball-check seating to prevent oil leakage from the swing cylinder to tank.

Also, a new 137-9466 Relief Valve (1), part of new 148-6516 Control Valve (A), does not require an adapter to fit the relief valve to the swing control valve. See illustration.


New and Former Swing Control Valves

(A) New 148-6516 Control Valve
(1) 137-9466 Relief Valve
(B) Former 127-5678 Control Valve
(2) 140-1148 Relief Valve
(3) 137-9464 Adapter

Adaptable To: New 148-6516 Control Valve (A) is effective with the following machine serial numbers:

New 148-6516 Control Valve (A) is adaptable to earlier machines listed above, 428B (7EJ08653 & Up), and 438B (3KK03635 & Up) Backhoe Loaders equipped with the former 127-5678 Control Valve.

Caterpillar Information System:

1999/06/28 A Special Instruction For Installing Ride Control Kits Is now Available {5004}
1999/06/28 Assembling The Transmission Thrust Bearings For Backhoe Loaders {3030}
1999/06/28 Splined Pins For Backhoe Loaders {6506,6502}
1999/06/28 New Pressure Switch Assembly For Engine Oil Improves Reliability {7455,1318}
1999/06/28 Installation Of Hydraulic Motor Case Drain Line {6129,5057,5051}
1999/06/28 Tension Cylinder Pin Now Includes Spacers {4197}
1999/06/28 Fender Mud Flaps Available {7252,4220}
1999/06/21 Methods Of Providing Feedback On Diagnostic Information {7569}
1999/06/21 Be Sure The Cylinder Head Bore For The Unit Injector Is Clean When the Unit Injector Is Replaced {1290}
1999/06/21 Drain Water And Sediment From The Fuel Tank Daily {1273}
1999/06/21 Proper Usage For The Steer Assist Switch {4129,1400}
1999/06/21 Improved Bonding For Longitudinal Stability Indicator Strain Sensor {7856}
1999/06/28 New Inlet Adapter Available For Water Pump Group {1364}
1999/06/28 Actuator For Transmission Switch Can Be Service Replaced {7332}
1999/06/28 New VIMS Service Manual Available {7601}
1999/06/28 Dimensions For Articulated Hitches, Lift Arms, Front And Rear Levers, And Oscillating Rear Axle Assemblies Are Now Available In An Updated Special Instruction {3260,3268,6116,6118,6119,6125,6126,6127,7057,7069,7100}
1999/06/28 Hydraulic S·O·S Port Relocated {7542}
1999/06/28 Remote Forward-Neutral-Reverse Transmission Control Option Eases Operation {5705,3065}
1999/06/28 Improved Fenders Increase Service Life {7252}
1999/06/28 Revised CD-ROM For Hydraulic Electronic Unit Injector (HEUI) Fuel System Available {0350}
1999/06/28 Special Instruction, REHS0494, "Accessing Flash Software For Machines", Is Now Available {7620}
1999/07/05 Improved Drawbar/Three-Point Hitch Increases Durability {7120}
1999/07/05 New Lifting Capacity Warning Film Now Available {7405}
1999/07/05 Improved Sun Gear Available For Off-Highway Trucks And Tractors {4050,4055}
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