1998/05/18 Caterpillar

New Final Drive Parts Reduce Gear Play {4051}

Usage:

214B FT (9MF),
224B (7WF) Excavators

New final drive parts are now available to service certain final drive parts for the wheel-type excavators listed above. A new internal gear replaces a gear and a carrier gear. A new piston replaces a collar. A smaller seal replaces the former seal. The replacement of the two former gears reduces the gear play which increases the stability of the machines during operation.

Chart A identifies the new and former parts for use in 214B steering and rear axle and for the 224B rear axle. All of the new parts must be replaced as a group.

See either chart for parts identification.

Chart B identifies the new and former parts for use in 214B steering and rear axle and for the 224B steering axle. All of the new parts must be replaced as a group.

Caterpillar Information System:

1998/05/11 New Engine Lifter Arm Assembly With Crowned Roller Used In Lifter Groups {1209}

1998/05/11 Bolt Pattern Change From Six To Four In Piston And Rod For Bucket And Stick Cylinders Improves Service Life {5457,5458}

1998/05/11 A New Switch Used In High Pressure Screens Of Discharge Lines From Hydraulic Pumps Is Resistant To Internal Leakage Of Hydraulic Oil {5050}

1998/05/11 Special Instruction, REHS0183, "Removal And Installation Of Tamperproof Caps On A RSV Governor" Is Available {1264}

1998/05/04 ROPS Instruction Film Available Through Parts Service{7177,7405}

1998/05/04 Improved Alternator Groups Now Available{1405}

1998/05/04 New Load Sensing Signal Relief Valve Prevents Wear Between Load Piston And Housing{5117}

1998/05/04 New Rear Glass Assembly Improves Cab Assemblies{7300,7310}

1998/05/04 Serviceable Parts For Hydraulic Pilot System Pump{5073,5085}

1998/05/04 New Retaining Ring In Final Drive Motor Group Improves Reliability{5058}

1998/05/04 Special Instructions Are now Available For Installing Two-Way And Four-Way Pilot Valves{5051,5059}

1998/04/27 New Hardened Sleeve For Load Check Valve In Control Valve For Stick Circuit Improves Service Life {5067}

1998/05/18 Entertainment Radios Improved With Increased Reliability {7338}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8961 {5050,0372}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8971 {5050,0372}

1998/05/25 New Ether Starting Aid Group Used {1456}

1998/05/25 New Valve Cover Seal Used {1107}

1998/06/01 Support Literature Is Now Available For Maintaining Air Conditioning And Heating Systems {7300,7304,7309,7320,7337}

1998/06/01 New Duo-Cone® Seals In Track Rollers Improves Corrosion Resistance And Low Temperature Performance {4180,7561}

1998/06/01 New Improved Alternator Guard Assembly {7168}

1998/06/01 Shims Prevent Binding Of Rotor In Swivel {5060}

1998/06/01 Installation Of Tow Hooks To Carbody {7103,7062}

1998/06/01 New Hardened Locknut Improves Retention Of Impeller On Piston Pump Shaft {5070}

1998/06/01 Information System Builder V1.2 May Experience An "Operating System Error" {7601}