1999/02/22 Caterpillar

Engine Control Axle Protection Override {1902}

Usage:

992G (7HR) Wheel Loaders

Reference: Service Magazine: October 19, 1998; Page 18; "992G Engine Control Software Update"

An additional feature of the announced 163-7212 Electronic Software Group can be utilized while using Electronic Technician (ET 2.3) to dynamometer test the 3508B (2GR) Engines in these wheel loaders. Currently the engine will derate 25 percent due to no communication with the transmission control.

After initializing communications with ET, go the DIAGNOSTICS tool bar. Select DIAGNOSTIC TOOLS and then select OVERRIDE PARAMETERS. Highlight AXLE PROTECTION DERATE OVERRIDE and use the CHANGE bar to move the NORMAL to DISABLED. This will override the derate while IN THIS SCREEN during the dynamometer test. The parameter can be returned to NORMAL by selecting DISABLE OVERRIDE or by simply changing to some other screen within ET. This feature prohibits the ability to accidentally leave the protection disabled.

NOTE: The option to select ON/OFF for Cold Cylinder Cutout was not corrected with ET 2.3 and should be available with the next ET update.

Caterpillar Information System:

1999/02/22 Improved Hydraulic Accumulator Mounting Clips Available {5077}

1999/02/22 Improved Radiator Cores Now Available {1353}

1999/02/15 New Brake Disc Wear Specifications {4250}

1999/02/15 Air Conditioning And Heater System Updates Improve Operation And Reliability {7304,7309,7337,7343}

1999/02/15 Rework Procedure Available To Upgrade Differential Case Assembly {3258}

1999/02/15 New Weld Procedures On 994 Wheel Loader Buckets Increase Service Life {6101}

1999/02/15 100 cm Of 5P-1471 Hose Required For each 994 Wheel Loader Dust Ejector {1068}

1999/02/15 New Auxiliary Drive Coupling Group Improves Service Life {3252}

1999/02/15 Correction To Disassembly And Assembly Manual, RENR2116 {0374,1387}

1999/02/15 Correction To Operation & Maintenance Manual, SEBU6492-02 {0374,0375,7490}

1999/02/15 New Thrust Washer Improves Service Life Of Differential Group {3258}

1999/02/15 Correction To Operation & Maintenance Manual SEBU6955 {0374,0375,7560}

1999/02/22 Correction To Service Brake Disc Information {4250,4255,7473}

1999/02/22 Shielded Metal Arc Welding And Flux Cored Arc Welding Information {0679}

1999/03/01 Washers Added To Avoid Bolt Interference On The D6G And D6G SR Hydraulic Pump{3108}

1999/03/01 Larger Capacity Power Train And Transmission Oil Filter{3005}

1999/03/01 Correction To Hydraulic System Oil Change Interval{5095}

1999/03/01 New Flywheel Housing Gasket For 3406 Machine Engines{1157}

1999/03/01 New Water Pumps With Improved Resistance To Shock Loads Used{1361}

1999/03/08 New Basic Fuel Transfer Pump Group Includes New Outer Lip Type Seal {1256}

1999/03/08 Instructions For Flashing ECMs On 657E Tractor Scrapers {7620,1901}

1999/03/08 Engine Hood Door Improved To Increase Service Life {7251,7263}

1999/03/08 New Muffler Reduces Cab Noise {1062}

1999/03/08 Use 147-1924 Portable Printer For Use On Wheel Loaders Equipped With The Payload Control System