SEAL-OIL 1850303 - Caterpillar

Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Turn the battery disconnect switch to the OFF position and lockout the battery disconnect switch with a safety lock.Place a Special Instruction, SEHS7332, "Do Not Operate" tag at the start switch and battery disconnect location to inform personnel that the machine is being worked on.
ReferenceSpecial Instruction, SEHS9615, "Servicing DT Connectors".ReferenceSpecial Instruction, REHS0148, "Listing Of Deutsch Connector Components"ReferenceSpecial Instruction, SEHS9065, "Use Of CE Connector Tools".ReferenceService Magazine, SEPD034227 January 97, "Field Repair Of Single Wire Breaks In Harnesses (Sealed Splice)".ReferenceService Magazine, SEPD037128 July 97, "Protection Of Unsealed Electrical Terminations For Machines In Corrosive Applications".ReferenceService Magazine, SEPD047324 May 99, "New DT Connector Plugs With Improved Seal Retention".ReferenceService Magazine, SEPD054509 October 00, "Dielectric Grease Should Not Be Used In Electrical Connectors".ReferencePocket Guide, SEBD0402, "Guidelines For Routing And Installing Wire Harness Assemblies".Use this procedure under the following situation:Use the following steps to help determine if the connector is the cause of the problem. If a problem is found in the electrical connector, repair the connector and verify that the problem has been corrected.The following background information is related to this procedure:Many of the operational procedures and the diagnostic code procedures in this troubleshooting guide will instruct you to check a specific electrical connector. Intermittent electrical problems are often caused by poor connections. Always check for an active diagnostic code before breaking any connections. Also, always check for an active diagnostic code after the connector is reconnected in order to verify that the problem disappears.Simply disconnecting the connectors and then reconnecting the connectors can temporarily solve a problem at times. If this occurs, likely causes are loose terminals, bent terminals, improperly crimped terminals, corrosion, or harness routing that is improper.The original source of the problem must then be identified in order to ensure that the problem does not reoccur.Follow this procedure to inspect the connectors thoroughly, in order to determine if the connectors are the cause of the problem.
Illustration 1 g00820688
(1) Correctly Routed Harness (2) Correctly Inserted Plug (3) Incorrectly Routed Harness (4) Incorrectly Inserted Plug
Illustration 2 g00690571
Proper Installation of Plug
Illustration 3 g00828600
DT Type sealing plugThe 8T-8729 Connector Pin (2) and the 8T-8730 Connector Socket (1) is designed to accept only one 16/18 AWG wire. Do not insert multiple wires of a smaller wire size. An incorrect method would be using two 24 AWG wires. The 9W-0852 Connector Pin and the 9W-0844 Connector Socket are designed to accept only one 14 AWG wire. Do not insert multiple wires of a smaller wire size. An example of an incorrect method is the use of two 20 AWG wires.
CHECK THE CONNECTORS.
Ensure that the connector is properly locked. Also, ensure that the two halves of the connector cannot be pulled apart.
Verify that the latch