The short tach cable went bad on my 5610 Ford, I got one at New Holland and have tried for 2 days to get it in and I'm beyond ------ off at it right now, with the round cover on you can't get it into the square hole, so I removed the cover and tried it that way but you can't see in there good enough to guide it in the square hole. I've tried an Endoscope and a bright light (with the oil filter removed) but still no luck. Is there a trick to this I don't know about? The parts man at ford said it bends down and goes right in.....yeah right. If it had a tube to hold it in place and guide it to the square hole things might be different.