1995/07/03 Caterpillar

New Bolts With "Lock-Patch" Used In Front Timing Gear Groups {1206}

Usage:

Caterpillar Machines Powered By 3408 (48W) And 3412 (73W) Machine Engines

Reference: Service Magazine; March 7, 1994; Page 14; "Be Sure To Use Correct Camshaft Idler Gear Shaft And Bolts"

Description of Change: New bolts with "lock-patch" on the threads are used to fasten the idler gear stub shaft to the cylinder block. The new bolts will provide better retention.

Location of new 3G-2292 Bolts (1) used to fasten idler gear stub shaft (2) to the cylinder block. Fuel Injection Pump and Timing Advance Drive Gear (A). Camshaft Drive Gear (B). Water Pump Drive Gear (C). Idler Gear (D). Crankshaft Gear (E). Oil Pump Idler Gear (F). Oil Pump Drive Gear (G).

Adaptable To: The new 3G-2292 Bolts are direct replacements for the 0L1351 Bolts in the front timing gears groups. The new bolts are effective with 3408 (48W38264) and 3412 (73W16121) Machine Engines. Five new 3G-2292 Bolts are required for each front timing gear group. Tighten the bolts to a torque of 55 ± 7 N·m (41 ± 5 lb ft).

Caterpillar Information System:

1995/07/03 New Exhaust Manifold Has Higher Temperature Capability {1059}

1995/07/03 Interface Seal Available For 70 Pin Connector Between Electronic Unit Injector (EUI) Wiring Harness And Electronic Control Module (ECM) {1408}

1995/07/03 New Liner Seat Inserts Allow Engine Cylinder Blocks with Deeper Liner Seat Cracks To Be Salvaged {1201,1217}

1995/07/03 New Idler Gear Assembly Used In Rear Gear Groups {1206}

1995/07/03 New Front Gear Group Used To Improve Load Carrying Capability {1206}

1995/07/03 New Pump Drive Seal Resists Cracking {3108}

1995/07/03 Improved Suspension Cylinder Spherical Ball Joint Bearing Gives Longer Service Life {7201}

1995/07/03 New Hitch Pins And Retaining Hardware Improve Lubrication Of The Oscillating Hitch Pins {7057,7113}

1995/07/03 Procedure To Inspect Disc Lining Assemblies For Wear {4273,4251}

1995/07/03 Water Lines Groups Changed To Eliminate Fan Guard Interference And Unneeded Lines {1380}

1995/07/03 New Pinion And Seal Assembly Replaces The Former Carbon Seal {3280,3254,3250}

1995/07/03 New Oil Cooler Assembly Used In Filter Base And Engine Oil Cooler Group {1378,1306}

1995/07/03 New Electronic Sensor Group (Speed/Timing Sensor) Used {1912}

1995/07/03 Flexible Braided Steel Hose Maintenance {1307,1380,1803}

1995/07/10 Longer Bolts And Spacers Used To Retain The Bearing Cage In The Transfer Gear Group{3159}

1995/07/10 Bonded And Riveted Brake Shoes And Lining Kits Are Available For Servicing 120-4931 And 120-4932 Service Brake Groups{4253,5251}

1995/07/10 Electrical System Updated, New Component List Available{1400,1406,1450}

1995/07/10 Caterpillar Long Life Coolant/Antifreeze Identification{1395}

1995/07/24 New Propel Pump Manifold Gasket Improves Service Life{5070,4350}

1995/07/24 Correct Amount Of Oil For Vibratory Bearing Reservoir{6645}

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

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

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

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