Connectors and Wiring Harness Requirements Table 1: Heat Shrink Tubing Reference Table 5.2.8 Wire Connection Guidelines The following requirements ensure the correct installation of solid contacts into connector terminals: • Do not solder the contact (socket or pin) to the wire. • Never crimp more than one wire into a contact. Connector contacts are designed to accept only one wire of a specified gauge or gauge range, do NOT insert multiple wires of a smaller gauge. • All contacts should be crimped on the wires. Use the Crimp Tool (Caterpillar part number 1U-5804) for 12 to 18 AWG wire. • Perform the pull test on each wire.
The pull test is used to verify that the wire is properly crimped in the contact and the contact is properly inserted in the connector terminal. Each contact and connector terminal should easily withstand 45 N (10 lb) of pull such that the wire remains in the connector body. 5.2.9 ECU Guards Petroleum ATEX engines require additional guards to meet ATEX directives. The guards are added to protect against physical damage that may result from falling tools or debris. The guards are utilized to reduce the chance of an arc or spark. Guards supplied with all ATEX engines include an ECU guard and a valve cover base wire entry guard.
The fuel temperature sensor on C18 ACERT and C32 ACERT engines has a guard as well. NOTE: All guards must be kept in place during engine operation. Any guard that has been removed, modified, or replaced with a non-certified guard will void the ATEX certification. A P P L I C A T I O N A N D I N S T A L L A T I O N G U I D E 35 Cat Part Number I.D. Before Shrink I.D. After Shrink (mm) (inch) (mm) (inch) 125-7874 5.72 0.225 1.27 0.050 125-7875 7.44 0.293 1.65 0.065 119-3662 10.85 0.427 2.41 0.095 125-7876 17.78 0.700 4.45 0.175