1988/05/16 Caterpillar

9G7641 Start Switch Is Improved{1416,1400}

Usage:

Reference: Service Magazine; December 10, 1984; Page 4; "Starters That Remain Engaged After Engine Is Running".

Description of Change: The 9G7641 Start Switch now has an improved seal around the tumbler to minimize moisture and dirt entry. This new seal is better able to keep contaminants out of the switch cavity to maintain a good electrical contact and keep the switch from sticking. A contaminated switch may stick in the start position. The resulting starter damage may be seen as milled drive teeth, an exploded armature commutator, or expanded armature winding bars.

Adaptable To: The improved 9G7641 Start Switch is adaptable to all products using the former switch. The part number did not change. The improved switch is identified by a dark blue terminal plate on the back of the switch. The former switch had a black terminal plate.

Caterpillar Information System:

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}

1988/04/25 New 1U8115 Generator Test Lead Set With Insulated Tips {0785}

1988/04/18 Modification To Prevent Oil Leaks Around Governor Control Shaft{1265,1287}

1988/04/18 Former Exhaust Valve Bridge For Jacobs Brake® Interferes With 40 mm Nozzle Adapter; New Bridge Used{1119,1100}

1988/04/18 How To Identify Failures To Electric Jacket Water Heaters{1383}

1988/04/18 1" 8T9141 Offset Sledging Wrench Available{0602}

1988/04/18 Some Components Of The Variable Pulley And Adjustable Pulley On The Kent-Moore Fuel Injection Test Bench Are Available From Caterpillar{0782}

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

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

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

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

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

1988/05/23 New Components Used In Water Lines Groups{1350}

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}