1995/08/07 Caterpillar

Injector Solenoids on Engines Equipped with EUI Are Not Polarity Sensitive{1259}

Usage:

D11N (4HK) Track Type Tractors;
776C (2TK),
784B (5RK) Tractors;
777C (4XJ),
785B (6HK),
789B (7EK),
793B (1HL) Trucks;
5130 (7TJ, 5ZL),
5230 (7LL) Excavators

This article replaces the article with the same title on Page 7 of the December 12, 1994 issue.

The EUI (electronic unit injector) solenoids (4) are not polarity sensitive. This means harness yoke (2) can be assembled onto the solenoid in any position, either side up. The rotational location of solenoid studs (3) can vary on each solenoid, therefore if the studs do not line up with the slots in the harness yoke, turn the harness yoke over. The wiring harness yoke is designed to attach to the solenoid regardless of solenoid stud position.

The tightening torque for the terminal nuts (1) is 1.70 ± 0.25 N·m (15 ± 2 lb in). Make note of this tightening torque in the appropriate Specifications Modules.

Connecting wiring harness to electronic unit injector solenoid. Terminal nuts (1). Harness yoke (2). Terminal stud (3). Solenoid (4).

Caterpillar Information System:

1995/08/07 Improved 1U-7430 Front Crankshaft Seal Installer Available{1160}

1995/08/07 Selecting The Correct Turbocharger, Wastegate Orifice, And Personality Module For 3500 Engines Used In 793B Trucks{1052,1057,1902}

1995/08/07 Selecting The Correct Turbocharger And Wastegate Orifice For 3500 Engines Used In 793 Trucks{1052,1057}

1995/08/07 Improved Payload Measurement System Pressure Sensors{7494,1901}

1995/08/07 Description Of Service Code Information{7450,7569}

1995/08/07 Brake Release Pump For Towing Is Available{4354}

1995/08/07 Rear Suspension Ride Height Has Changed{7213,3278}

1995/07/31 New "High Efficiency" Fuel Filters Help Prevent Worn Injectors{1261}

1995/07/31 Carriage Rotate Pivot Pin Now Available From Part Service{6408}

1995/07/31 New Hitch Control Retains Engine Speed And Eliminates Hitch Ratcheting{5100}

1995/07/31 New Fuel Sender Provides Increased Reliability{7481}

1995/07/24 New Exhaust Manifold Shield Adds Uniformity To 3500 Machine Engines{1067}

1995/08/14 Reattaching Grommets To 3E-9167 And 3E-9170 Machine Performance Panels{7490}

1995/08/14 New Axle Sustains Higher Dynamic Loads{3282}

1995/08/14 Hood Grill Improved With Enlarged Inserts{7251}

1995/08/14 New Components In Water Lines Groups And Aftercooler Group Allow Field Installation Of Variable Speed Fan Clutch Vital Information Management System (VIMS){1380,1063,1359}

1995/08/14 Parts Service Information For Articulated Trucks Equipped With Wide Gears In The Final Drive And A Spacer Between The Wheel Assembly And Planetary Carrier{4055,4051}

1995/08/14 New Indicator For Hydraulic Charge Filter Prevents Leakage{5068}

1995/08/14 New Exhaust Manifold Group Helps Prevent Exhaust Manifold Cracking{1059}

1995/08/14 Wear Sleeve Removal Tooling May "Mark" The Crankshaft{1202,1161}

1995/08/14 New Piston Crown Assembly Used In Piston And Rod Group{1214}

1995/08/14 Piston Usage Chart For Two Piece Pistons{1214}

1995/08/14 Remanufactured 3500 Engine Core Return Requirements{1000}

1995/08/21 Low Friction Wear Ring Is Available For The Front Suspension Cylinders To Help Reduce Vibration{7201}