I have a new-to-me Namco 2015 forklift. When they put it on the rollback, it would start. When it go here, it didn't anymore. I'm trying to troubleshoot it.
It has the liquid withdrawal propane system. With both the tank valve and the second valve open, it will crank, but not catch.
Spark:
If I pull the leads off the spark plug and hold them near the engine block, I get a spark. This is true for both cylinders.
Compression:
Haven't tested it
Fuel:
Here's where it gets interesting.
1) According to the wiring diagram, the wire to the lockoff valve comes from the oil pressure sensor. The pressure sensor is connected to the ignition switch and the starter button. It sends voltage to the solenoid if (ignition switch AND oil pressure) OR (starter button). My oil pressure sensor is wired up a little differently (see photo). The red wire is to the starter button. The yellow wire (to the igntion switch) and the white wire (to the lockoff valve) are both connected to the same terminal, so if the ignition is on, there is power to the lockoff valve, which seems wrong.
2) When you turn the ignition switch, you send power to the lockoff valve solenoid. Usually you don't hear any sound from it. Occasionally you can hear the solenoid switch, which implies that the lockoff valve isn't switching consistently.
3) The lockoff valve appears to be failing open, as when I crack the fitting before the regulator (see photo) I get propane coming out, regardless of the position of the ignition switch. If I shut off the manual valves, the propane stops leaking after a bit. When I turn the manual valves back on, the propane starts leaking through the cracked fitting, regardless of the position of the ignition switch.
4) all this means I am getting propane to the inlet of the regulator, but beyond that I'm not sure how/where to start troubleshooting.
If this hadn't worked an hour before it showed up at my shop, I would think that the wiring was completely screwed up, but the fact that it just worked before the truck ride implies that something vibrated loose/broke. I just can't find it. To be honest, I don't see how it's not leaking propane constantly given that the lockoff valve isn't working and/or is wired directly to the ignition.
Does anyone have any advice?
Can anyone with the same lift please tell me how their oil pressure sensor is wired?
Thanks,
Daniel
It has the liquid withdrawal propane system. With both the tank valve and the second valve open, it will crank, but not catch.
Spark:
If I pull the leads off the spark plug and hold them near the engine block, I get a spark. This is true for both cylinders.
Compression:
Haven't tested it
Fuel:
Here's where it gets interesting.
1) According to the wiring diagram, the wire to the lockoff valve comes from the oil pressure sensor. The pressure sensor is connected to the ignition switch and the starter button. It sends voltage to the solenoid if (ignition switch AND oil pressure) OR (starter button). My oil pressure sensor is wired up a little differently (see photo). The red wire is to the starter button. The yellow wire (to the igntion switch) and the white wire (to the lockoff valve) are both connected to the same terminal, so if the ignition is on, there is power to the lockoff valve, which seems wrong.
2) When you turn the ignition switch, you send power to the lockoff valve solenoid. Usually you don't hear any sound from it. Occasionally you can hear the solenoid switch, which implies that the lockoff valve isn't switching consistently.
3) The lockoff valve appears to be failing open, as when I crack the fitting before the regulator (see photo) I get propane coming out, regardless of the position of the ignition switch. If I shut off the manual valves, the propane stops leaking after a bit. When I turn the manual valves back on, the propane starts leaking through the cracked fitting, regardless of the position of the ignition switch.
4) all this means I am getting propane to the inlet of the regulator, but beyond that I'm not sure how/where to start troubleshooting.
If this hadn't worked an hour before it showed up at my shop, I would think that the wiring was completely screwed up, but the fact that it just worked before the truck ride implies that something vibrated loose/broke. I just can't find it. To be honest, I don't see how it's not leaking propane constantly given that the lockoff valve isn't working and/or is wired directly to the ignition.
Does anyone have any advice?
Can anyone with the same lift please tell me how their oil pressure sensor is wired?
Thanks,
Daniel