1996/02/26 Caterpillar


New Hoist Valve Reduces Leakage{5136}

Usage:


D25D (1HK),
D30D (3AJ, 1PK),
D350D (9RF),
D400D (8TF) Articulated Trucks

Description of Change: A new hoist valve has improved spool sealing to reduce leakage.

Adaptable To: The new 123-9490 Hoist Valve Group is a direct replacement for the former 7U-1154 Hoist Valve. The new hoist valve is effective with D25D (1HK564), D30D (3AJ386, 1PK035), D350D (9RF564), D400D (8TF1150) Articulated Trucks.

NOTE: A new 125-9712 Seal Kit has been released for the 123-9490 Hoist Valve Group. The new 125-9712 Seal Kit is adaptable to the 7U-1154 Hoist Valve with the following parts.


(1) 125-9709 Retainer-Wiper. (2) 125-9710 Retainer-Seal. (3) 125-9711 Clamp-Seal Retainer.

Caterpillar Information System:

1996/02/26 New Rubber Belt Step Available{7254}
1996/02/26 Magnetic Plug Now Used On Front Wheels{4208}
1996/02/26 Service Manual And Service Kits Available For Engine Variable Speed Fan Clutch{1359}
1996/02/19 New Brackets Help Prevent Damage To Engine Fuel Injection Lines Groups{1252}
1996/02/19 New Material Used In O-Rings And Optional New Block Side Cover Replacement{1201}
1996/02/19 New Bolts And Washers Used In Rear Axle Spindle To Rear Axle Joint Provides Additional Strength To Prevent Bolt Breakage{3260}
1996/02/19 Use Of BIO HYDO Oils in Off-Highway Trucks{3022}
1996/02/12 Closed Engine Crankcase Breather System Maintenance And Repair {1317,1107}
1996/02/12 New Components Used In Governor And Fuel Pump Drive Group{1288}
1996/02/12 New Pressure Switch Assembly Is Available For Fuel Applications; 9G-8011 Pressure Switch Assembly Should Not Be Used In Fuel Applications {7414}
1996/02/12 Replaceable Drawbar Wearplate Eliminates Wear On Support Assembly{7105,7119}
1996/02/05 Lubricant Used On Cylinder Head Bolts Changed{1100}
1996/02/26 New Troubleshooting Guide Is Needed To Test The Grade/Slope System{7219,7569}
1996/02/26 New Engine Cylinder Head Injector Sleeve Used In Both Mechanical Unit Injection (MUI) And Hydraulic Electronic Unit Injection (HEUI) Engines{1125}
1996/03/04 Ring Seals No Longer Required At Six Locations In Turbocharger Groups{1052}
1996/03/04 New Interaxle Differential Groups Have New Thrust Discs For Improved Service Life{3258,3287}
1996/03/04 Dimensions For Radio Installation {7338}
1996/03/04 Flash Programming Capability Is Required{1901,1902}
1996/03/11 New Transmission Input Shaft Seal Prevents Leakage{3189,3401}
1996/03/11 Undercarriage Gauge and Belt Width Options{4150,4199,4198}
1996/03/11 Improved Mounting And Valve Group (Retarder Control Valve) Can Be Installed To Improve Retarder Control Valve Service Life{3123}
1996/03/11 New Drum Support Gearbox Used To Improve Service Life{4053}
1996/03/11 New Logic Valves Stop Conveyor Belt Creep{6620,5051}
1996/03/11 Speed Sensor Group Contains New Gear Mesh Adjuster Parts For Feet Per Minute Encoder{7495}
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