1988/05/23 Caterpillar

New Components Used In Water Lines Groups{1350}

Usage:

3406B ( 4MG, 8TC ) Truck Engines

Description of Change: Several new components are used in water lines groups used on 3406B Truck Engines. The new components include the water pump cover, regulator housing cover, manifold housing, hose, and clamps. The new covers and housing are made from aluminum. The new components will provide improved coolant flow, serviceability and reliability.

Adaptable As: The new 9Y2585 Water Pump Cover, 9Y2586 Regulator Housing Cover, 9Y2587 Manifold Housing, 8T4983 Clamps (earlier engines have 8T6703 Clamps), and 9Y4104 Hose (some earlier engines have 5P763 Hose) are used in the water lines groups used on 3406B Truck Engines. The new covers and housing are in effect with 3406B Truck Engines 4MG15702 and 8TC2573. The new components are shown in the illustration. Tighten the new 8T4983 Clamp to a torque of 7.3 N·m (65 lb in).

Location of new components in water lines groups.

Caterpillar Information System:

1988/05/23 Ways To Prevent Overcooling Of 3306B (63Z, 76R) Truck Engines{1355}

1988/05/23 New Engine Lifting Bracket Available{0632}

1988/05/23 Larger Capacity Refrigerant Charging Cylinders Available For Charging Air Conditioner Systems{0647,7320}

1988/05/23 Four New Swivel Tee Fittings Can Be Used For In-Line Pressure Testing{0784}

1988/05/23 New 1U9139 Universal Fuel Line Pickup Available{0775}

1988/05/16 9G7641 Start Switch Is Improved{1416,1400}

1988/05/09 New 1U6392 Pressure Reducing Valve Regulates Pressure To Hydraulic Pumps During Bench Testing {0784}

1988/05/09 Improved Seals Used; Seal Replacement In Folded Core Radiators {1353}

1988/05/02 Diode Added To Prevent Damage To Time Delay Relay {7421}

1988/04/25 Improved RH Watercooled Exhaust Manifold And Exhaust System Sealing {1059,1070,1061,1050}

1988/04/25 New Socket In Valve Rocker Arms Provides Lubrication For Inlet Valve Seats {1103,1105,1123}

1988/04/25 New Diaphragm For Brakesaver Control Valve {1159,1155}

1988/05/23 New Adapters Have Orifice To Extend Life of Fuel Pressure Gauges{7456}

1988/06/06 Installation Of Valves For Live Oil Sampling{7770,0770,0781,0783,0784}

1988/06/06 Lubricant Supplements List Specifications For CXP Lubricants{0645,7000}

1988/06/06 Reusability Guidelines For Phosphate/Oil-Coated And Zinc-Plated Fasteners{7553}

1988/06/06 Silicone Water Passage Seal Can Be Used Where Contact With Oil Is Unavoidable During Assembly Of Cylinder Heads{1100}

1988/06/13 New Crankshaft Damper Has Rubber Bonded To Hub And Ring{1202,1205}

1988/06/13 Piston Application Guide{1214,1215}

1988/06/13 Additional Information For Installing Fuel Injectors{1290,1257}

1988/06/13 Rotor Shaft Keyways Are Now "{4454}

1988/06/20 Maintenance-Free Batteries Require Different Troubleshooting Procedures{1401}

1988/06/20 Software Upgrade For The 8T5282 Digital Diagnostic Tool (DDT){0600,1250}

1988/06/20 Large Engine Blowby Group Available To Measure Crankcase Blowby And Radiator Air Velocity{0781,1200,1350}