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When removing my pump, a wire either became unhooked or it was never hooked up. Page 66 on the following link. The wire in question is the one From the solenoid to part #18. My guess is this wire was just hanging around unplugged. #18 is to the part that is located inside under the hydraulic reservoir near the pto lever correct? Is this needed to be hooked up to run? Thanks.


 

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Hi Dan,

Part #18 is the PTO safety switch that prevents the engine from cranking unless the PTO is off.

When the key is turned to the start position, it feeds power to one side of the starter solenoid coil (via the wire connecting it to the key switch "S" terminal). The other side of the solenoid coil is connected to the PTO safety switch (#18) and then on to the neutral safety switch (#13). When both of those switches are closed (PTO off & travel lever in neutral) it completes the path to ground, allowing the solenoid to pull in and feed power to the starter/generator.

So if that wire connecting the PTO switch (#18) to the solenoid was not hooked up the engine wouldn't crank. Unless a previous owner bypassed the safety switches with a jumper wire or installed a solenoid that has it's coil grounded via it's mounting bracket.
 
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