Apply 12 volts to the 24 volt plugs and you will get 1/4 of the heat output, but they will still heat as long as you don't have any 24 volt relays etc. They won't work.
Cat offered 12V Plugs
155 Watt part# 4S7812
120 Watt part# 3S9612
Do you know if they fit/replace the 3H2033 glow plugs in the 1S1907 pre-com chambers?
No not sure.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
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