agrimax wrote:Those are coolant temperature sensors. One for the temp gauge,one for the temp warning light/buzzer. Can't remember exactly but think the one circled in red is for the gauge.
The glow plug/heater,if fitted,would be on the inlet manifold. Would have a steel pipe and wire attached to it. Back,right hand side of the engine,usually on the elbow or adapter that the air filter rubber hose attaches too. It really shouldn't need it to start unless it is exceptionally cold....
Thanks for the information. The glow plug /heater you mentioned is there and seems ok but I will have to have a more thorough check of it & the wiring. Where is my thermostat located ? As i said, new to this machine and feeling my way through the various issues. My primary issue is hard starting. Its not a fuel delivery issue as I have gone through the entire system apart from the gauze / filter that is apparently located in the injector pump but the previous owner said he had the pump rebuilt. The machine has a Mahle AZF4147 12V 4.2kw starter on it.