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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
743B engine shutdown solenoid
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<blockquote data-quote="skidsteer.ca" data-source="post: 2917" data-attributes="member: 307"><p>Our miller welder uses one of these types of solinoids to throtle up when welding. It has a spring in the pull linkage to allow some give to insure the plunger seats fully.</p><p>You might want to retain some manual way of locking on the fuel and unhooking the pull in wire.. To protect the solinoid should extended crank intervals become necesary, (ie fuel filter bleeding)</p><p>The bobcat ones have been good to me , no burn outs, but we tried a similar Murphy Switchgage (<a href="http://www.fwmurphy.com" target="_blank">www.fwmurphy.com</a>) watchdog system on 2 skidders with 6v53 detroit diesels, (known for loseing oil press and turning bearings) they of course have no electric shut off and a solinoid was necessary. But they kept burning out for various reasons. They system was too complex and those engines have so little oil pressure at a idle that we kept getting false shutdowns. Which really agrevated the operator and myself, the trouble shooter.</p><p>In the end we gave up on shutting of the engine and set up a light to "blind" the operator should the watchdog get a trip/shutoff reading from one of the guages. The operator could then check the guage to verify if it was false or correct.</p><p>Also I know my 93 753 had a spdt relay wired into the pull in wire, so I don't think it got power from the starter. Though I don't see why that won't work.</p><p>Its somewhat common for those "spdt" relays to wear out @ 2000 hrs and give sporadic start problems by not always turning on the fuel.</p><p>Just a few thoughts.</p><p>Ken</p></blockquote><p></p>
[QUOTE="skidsteer.ca, post: 2917, member: 307"] Our miller welder uses one of these types of solinoids to throtle up when welding. It has a spring in the pull linkage to allow some give to insure the plunger seats fully. You might want to retain some manual way of locking on the fuel and unhooking the pull in wire.. To protect the solinoid should extended crank intervals become necesary, (ie fuel filter bleeding) The bobcat ones have been good to me , no burn outs, but we tried a similar Murphy Switchgage ([URL='http://www.fwmurphy.com']www.fwmurphy.com[/URL]) watchdog system on 2 skidders with 6v53 detroit diesels, (known for loseing oil press and turning bearings) they of course have no electric shut off and a solinoid was necessary. But they kept burning out for various reasons. They system was too complex and those engines have so little oil pressure at a idle that we kept getting false shutdowns. Which really agrevated the operator and myself, the trouble shooter. In the end we gave up on shutting of the engine and set up a light to “blind” the operator should the watchdog get a trip/shutoff reading from one of the guages. The operator could then check the guage to verify if it was false or correct. Also I know my 93 753 had a spdt relay wired into the pull in wire, so I don't think it got power from the starter. Though I don't see why that won't work. Its somewhat common for those “spdt” relays to wear out @ 2000 hrs and give sporadic start problems by not always turning on the fuel. Just a few thoughts. Ken [/QUOTE]
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General Bobcat Skidsteer Forum
743B engine shutdown solenoid
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