Terex 1998 TB60 has lockout if booming out after approx 1 foot , unstable light on . Can lift from platform til approx 20 degrees , lockout . Weak battery replaced ng. Bad ground from battery to chassis ng Rpm raised ng Test level switch in ground panel OK Oddly , occasionaly will seem to boom out ok when cold , bring back in and try to go out again and red light . Ideas anybody ?
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