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| Illustration 1 | g00528848 |
System Schematic for the Transmission and Grapple Electronic Control Module (ECM) (1) Transmission and grapple ECM. (2) Service tool connector for the Caterpillar Electronic Technician (ET) and the Electronic Control Analyzer Programmer (ECAP). (3) Caterpillar Monitoring System. (4) Service mode plug. (5) Start relay. (6) Key start switch. (7) Neutral lock switch. (8) Parking brake pressure switch. (9) Tong auto/manual switch. (10) Transmission direction switches and speed switches. (11) Tong close pressure sensor. (12) Backup alarm. (13) Grapple solenoid return relay. (14) Backup alarm relay. (15) Tong open solenoid. (16) Transmission speed solenoid 6. (17) Tong close solenoid. (18) Transmission speed solenoid 5. (19) Grapple rotate solenoid (Clockwise). (20) Transmission speed solenoid 4. (21) Grapple rotate solenoid (Counterclockwise). (22) Transmission direction solenoid 3 (Low Forward). (23) Tong position switch. (24) Transmission direction solenoid 2 (Reverse). (25) Grapple rotate switch. (26) Transmission direction solenoid 1 (High Forward). | |
Note: This is a simplified electrical schematic of the transmission and grapple Electronic Control Module (ECM). The schematic is electrically correct, but the schematic does not show all possible harness connectors.
Note: For machines that are equipped with a winch, refer to the Schematic, SENR1361, "515 & 525 Wheel Skidders Electrical System".
Reference: For more information on the transmission and grapple Electronic Control Module (ECM), refer to the Service Manual module, Systems Operation, Testing and Adusting, "Electronic Control Module (Transmission and Grapple)" for the machine that is being serviced.