we had one of them at the old farmhouse, coal burner converted to oil. i"m not a furnace guy, but if i remember ours would do the same thing. basically when the thermostat calls for heat it sends a signal to a temperature probe that is located in the firebox, kind of a square box the size of half a cigar box, there is a bi-metal probe that goes into the fire box. that controls the burner cut in and cut out temmperatures. there may be a reset button on there. pull the box and probe out of the furnace and blow all the soot off of it. there should be a dial on it with two arrows, one for cut in temp, one for cut out. the wires from there go to the solenoid to turn the main gas burner on. should be that big diaphram thing in the photo. that opens the gas valve for the main burners. if that furnace hasnt been cleaned in a while, open the big door afeter you shut the power and gas line off, vacuum that thing out real good. probably full of soot. there should be an air adjustment shudder to regulate air flow to main burner to adjust the flame. should have a good blue flame, if it got a lot of yellow flame, you need to adjust the air a little. you want a blue flame with just a little yellow on the tips. could also be the solenoid on the main gas valve is sticking too.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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