The 25-amp fuse (F1) and 10-amp fuse (F2) protect The fuel shutoff relay contacts close, allowingĬurrent to flow to the fuel shutoff solenoid. In this state, the transistor provides anĪlternate path to ground for the fuel shut-off relayĬoil. As long as current from the interlockĬircuit flows to transistor (C), the transistor is Module, current flows from pin “7” to fuel shut-off Switches, transmission neutral switch, to pin “7” of (F1) through the interlock contacts of the PTO With these conditions met, current flows from fuse In the N/STOP position, and PTO switch(es) in the RUN or START position, the hydrostatic control lever Interlock circuit, the key switch must be turned to the Shutoff solenoid can still be maintained through the When operator is off the seat, current to the fuel Shutoff solenoid, allowing the engine to continue Current flow is NOT interrupted to the fuel Re-established to the time delay IC before it has aĬhance to “time out” and stop current flow to the If the operator returns to the seat withinĪpproximately one second, current flow is Relay contacts (A), which allows the engine to If this happens, the seat timeĭelay IC delays the opening of fuel shutoff NOTE: Driving the machine over rough terrain canĬause the seat switch contacts to momentarily Theĭe-energized solenoid moves the fuel shutoff linkage The open relayĬontacts stops current flow to the fuel shutoff The fuel shut-off relay coil to stop flowing, which The transistor will “switch off”, causing current through The time delay IC stops current flow to transistor (D). Return to the seat within approximately one second, Switch contacts open, causing current to stop flowing When the operator rises from the seat, the seat This opens a valveĪnd allows fuel to flow into the fuel injector pump. From solenoid (Y3), current flows through 8-ampĬircuit breaker (F5) to ground, energizing the This energizes the relayĬoil which closes fuel shut-off relay contacts (A).Ĭurrent from fuse (F1) then flows across the relayĬontacts and out pin “2” of 8-pin connector (X13).įrom pin “2”, current flows to fuel shutoff solenoid Inside the TDC module, current flows through the fuel Pin “3” of the TDC module 8-pin connector (X13). Ground path allows current to flow from fuse (F1) to The path to ground for fuel shut-off relay coil (B). As long as current from the timeĭelay IC flows to the transistor, the transistor is Time delay integrated circuit (IC) (E), then to seat timeĭelay transistor (D). Inside the TDC module, current flows through seat From fuse (F2), current flows across the closedĬontacts of the seat switch to pin “9” of TDC module From terminal “BR”,Ĭurrrent flows to 25-amp fuse (F1) and 10-amp fuse Current flows across the key switchĬontacts to terminal “BR”. (G1), through fusible link (F4) to terminal “B” of the Switch (S1) is turned to the RUN or START position,Ĭurrent flows from the positive (+) terminal of battery The normally open contacts of seat switch (S6) close Second with machine in gear or PTO engaged. The operator rises from the seat for more than one Manually using the key switch or automatically when Stop engine operation by shutting off fuel flow to theįuel injector pump. The function of the fuel shutoff solenoid circuit is to Quoting from the manual, the two wire works like this: The TDCM ensures that the pull in winding is pulsed for only a few seconds. Caution on the three wire version as the "pull in" winding is not meant to be powered for long periods of time and will overheat and burn out.
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