SEAL AS-PISTON 5391744 - Caterpillar

To restart the engine, do the following steps:1. Turn engine control switch (ECS) to STOP.2. Correct the low oil pressure fault.3. Rotate the ECS to RESET position which opens the circuit across ECS terminals (8 and 5) (line 36). This allows the OPR (line 39) to de-energize. OPR contact (line 40) opens and shuts off the light (OPL). Also, OPR contact (line 52) opens to de-energize the relay (ENFR). The contact across ENFR (7 and 1) (line 56) closes to allow restart.4. The system is ready to start if ECS is turned to START or AUTO.Engine Shutdown Caused By Water Temperature Fault
Simplified schematicWhen engine coolant temperature becomes too high, the normally open water temperature switch WTS contacts (2 and 1) (line 43) close. This, in turn energizes the water temperature relay (WTR) (line 43) and water temperature fault light (WTL) (line 44). WTR contact (line 44) closes to latch in the relay WTR.The normally open WTR contact (line 53) closes to energize the engine failure relay (ENFR) (line 54). Normally closed (N.C.) contact ENFR (7 and 1) (line 56) opens to de-energize relay RR (line 56). The contact across RR (8 and 2) (line