I have a 1985 Ford 1310 tractor, which is actually a Shibura (Shibaura) 3 cylinder machine. I've had it around 8 years, it's always been very difficult to start. I need to run the glow plugs three times, and raise the bucket while cranking to reduce hydraulic back pressure and play the throttle just right in order to get it to start. Too little throttle and I get white smoke, too much throttle and I get black smoke. I have put in new glow plugs, had the injectors rebuilt, and then took them out and had them rechecked twice without improvement.
Mechanic said it needs a new fuel pump, so i sent away for a reconditioned one. These are cam driven pumps which require shims under the pump body in order to adjust the timing. According to the manual, first step is to turn the crankshaft until you are 30° before TDC, then remove the small piston and spring from the number one cylinder port on the pump and open the fuel and let it free flow. Then advance crankshaft until the fuel flow stops. Then it should be at first timing mark on the front pulley. If not, shims must be added or subtracted until the timing is correct. This is called injector pump spill timing procedure.
The problem is that while carrying out the procedure the fuel never does stop free flowing from the number one port on the injector pump. Does this indicate a defective injector pump? The old injector pump also behaves the same way. Or should we complete the installation without timing and look at problems with the hydraulic relief valve?
I would be interested to hear others experience with timing cam driven fuel injection pumps.
Mechanic said it needs a new fuel pump, so i sent away for a reconditioned one. These are cam driven pumps which require shims under the pump body in order to adjust the timing. According to the manual, first step is to turn the crankshaft until you are 30° before TDC, then remove the small piston and spring from the number one cylinder port on the pump and open the fuel and let it free flow. Then advance crankshaft until the fuel flow stops. Then it should be at first timing mark on the front pulley. If not, shims must be added or subtracted until the timing is correct. This is called injector pump spill timing procedure.
The problem is that while carrying out the procedure the fuel never does stop free flowing from the number one port on the injector pump. Does this indicate a defective injector pump? The old injector pump also behaves the same way. Or should we complete the installation without timing and look at problems with the hydraulic relief valve?
I would be interested to hear others experience with timing cam driven fuel injection pumps.