1990/10/01 Caterpillar


New Magnetic Sensor Has Improved Shell And Potting Compound {7463,3175}

Usage:


776B, D11N, Challenger 65 Tractors;
910E, 966F Loaders;
IT12B, IT14B Toolcarriers;
D25D, D30D, D40D, D350D, D400D, 777B, 785, 789 Trucks

Reference: This article supersedes the article with the title "New Magnetic Sensor With Improved Sealing Capabilities Used In Speedometer Group" on Page 9 of the August 13, 1990 Service Magazine.

Description of Change: A new magnetic sensor with an improved shell and potting compound is used. The new sensor has a blind end shell to prevent potting compound movement and minimize wire breakage. A new grommet is also used which prevents moisture from entering the sensor. The potting compound used in the former sensor could separate from the shell. When this happened, wire breakage and contamination to the sensor could cause the sensor to fail.

Adaptable To: The new 9X5393 Magnetic Sensor replaces the former 6T9688 Magnetic Sensor (not canceled). This change is effective with 776B (6JC84) Tractors; 910E (1SF212, 1YK275) Loaders; IT12B (1KF161), IT14B (3NJ151) Toolcarriers; 777B (4YC1356), 785 (8GB415), 789 (9ZC426) Trucks, and is adaptable to first production.

NOTE: The electrical specifications on the new sensor are identical to the former sensor.

Caterpillar Information System:

1990/09/24 Add Bolt Dampers To Oil Pump Mounting Bolts to Prevent Bolt Failures{1304}
1990/09/24 Standard Oval And High Temperature Oval Head Seals Available For Certain Hydraulic Cylinder Applications{7555,5102,5456}
1990/09/24 Sealing Threads On Switches And Sensors That Are Grounded Through The Case{1400,1900,3175,7422,7493}
1990/09/24 Two New Coolant Flow Switches Used On Machines Equipped With Electronic Monitoring System (EMS){1361,7422,7470}
1990/09/24 Improved Access To Hydraulic Oil Level Indicator Harness{7490}
1990/09/24 New Fixed Length Door Stop Used{7308}
1990/09/24 Seal And Seal Holder In Transfer Gear Groups Now Serviced As One Piece{3159}
1990/09/24 New 6R2915 Seal Kit Available For 8C3866 Upper Conveyor Drive Motor{4351}
1990/09/24 Field Installation Kit Available To Install Magnetic Clutch-Type Water Spray Pump, Cutter Drum Interlock, And Kick-Back Shoe{1408,5614,6601,7493}
1990/09/24 New Components Improve Propel And Throttle Adjustments{1265,3209}
1990/09/24 New Support Plate Assembly And Spacers Used{6607}
1990/09/24 Procedure To Eliminate Implement Hydraulic Hesitation{5129}
1990/10/01 New Governor Control Bracket Used To Prevent Bolt Loosening {1265}
1990/10/01 What's Your Answer? {0114,1400}
1990/10/01 Correct Light Bulb Replacement For The 8T9290 Borescope; New Light Bulb Used {0777}
1990/10/01 New 4C6090 Multichannel Temperature Selector Available To Aid In Diagnosing Low Power Complaints {0781}
1990/10/01 Incorrect Installation Of Slow-Moving Vehicle Sign (Triangle) May Affect Cooling Performance {7405,1353,7557}
1990/10/01 Answers To Quiz In This Issue {0114,1400}
1990/10/08 Gerotor Charge Pump Used On Propel Pump; Inadequate Charge Pressure May Occur{3204,4320,5070,5082,7428}
1990/10/08 Correct Installation Of Brake Piston Seals{4251}
1990/10/08 Serviced Parts Available For 8C4773 Electric Starting Motor Group{1453}
1990/10/08 Larger Drain Hole In Air Cleaner Group{1051}
1990/10/08 All Wheel Drive System Not Disconnected For Shipping Purposes{7500}
1990/10/08 Improved Rod Seal Combinations Used In Hydraulic Cylinders{4303,5104,5456,5457,5458,5468}
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