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This topic has come up in another thread and I thought I would start anew. I have yet to figure this one out. I have seen threads on other sites discuss it to no real conclusion. Maybe someone can help me out. To start with, there is major confusion in Deere's manuals, parts documentation, and equipment.I do not believe the 2520 ever had glow plugs, just like their predecessors the 4115, always been direct injection....
Let me start with the operator manual, it lists absolutely nothing in the manual about a heater, glow plug, or indicator light. Yet, the dash on my tractor has an indicator light. The parts manual lists a manifold heater for the international model only. Upon inspection my tractor does not yield any signs of said heater. But then again, according to the overhaul manual there is electrical diagrams showing a heater. Now for the real kicker, if I start the tractor while waiting for the indicator light to time out I certainly have a perceived notion that it does some good. I am extreamly confused.:unknown: