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Farm Machinery
Classic Machinery
McCormick 434 IH 1968
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<blockquote data-quote="darrylh" data-source="post: 7250681" data-attributes="member: 153710"><p>Hello,</p><p></p><p>I have a (new to me) IH 434, which will not start. I get smoke but the glow plugs/pepperpot do not seem to work. I have installed new plugs and wired in series. Since then 2 pots have burnt out (orange/white hot). I have started to look at the wiring but key switch is not original and does not have the 6 terminals as per manual wiring diag. Loom wires are all red/red paint! and can only make out one connected wire Brown/yellow (any id please?). I have also bought a new 4-position key switch (only 5 term though) but now have off/ign/heater/start wired to my satisfaction.</p><p></p><p>Questions: re plug circuit (as it came wired to me). Plug (4?) nearest fan is ground onto plate with CAV pump attached. Is this effective ground? </p><p> Plug (1?) has wire to one term on the pepperpot. Other pot terminal goes to term3 on key switch. Is this right?? </p><p></p><p>Would it be better to bypass pepperpot with 12v plugs. I believe these have 20 secs burn, so while the pot might indicate when to switch on, I am used to counting to 20 same as my Series 2A. </p><p></p><p>Any suggestions and help would be greatly appreciated. Thanks Darryl</p></blockquote><p></p>
[QUOTE="darrylh, post: 7250681, member: 153710"] Hello, I have a (new to me) IH 434, which will not start. I get smoke but the glow plugs/pepperpot do not seem to work. I have installed new plugs and wired in series. Since then 2 pots have burnt out (orange/white hot). I have started to look at the wiring but key switch is not original and does not have the 6 terminals as per manual wiring diag. Loom wires are all red/red paint! and can only make out one connected wire Brown/yellow (any id please?). I have also bought a new 4-position key switch (only 5 term though) but now have off/ign/heater/start wired to my satisfaction. Questions: re plug circuit (as it came wired to me). Plug (4?) nearest fan is ground onto plate with CAV pump attached. Is this effective ground? Plug (1?) has wire to one term on the pepperpot. Other pot terminal goes to term3 on key switch. Is this right?? Would it be better to bypass pepperpot with 12v plugs. I believe these have 20 secs burn, so while the pot might indicate when to switch on, I am used to counting to 20 same as my Series 2A. Any suggestions and help would be greatly appreciated. Thanks Darryl [/QUOTE]
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Farm Machinery
Classic Machinery
McCormick 434 IH 1968
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