ceb58
40kw diesel with "C" panel. Problem. Turn off utility gen goes into start mode some times it takes 2 or 3 crank cycles for it to crank but most of the time it will go out on over-crank after the 3ed cycle with out starting. Go to the control panel put switch in manual position, hit the start switch and it will turn over about three times and crank. Shut it down, put it back in auto same thing wont crank. I have replaced the auto/off/man switch and the start switch checking all connections. Both mag pick up's have correct voltage. Unit has block heater that keeps it around 160deg so its not cold.
After vacation I am going back to replace all female spade terminals on switches to make sure of the connections. Any other ideas?
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mastr
I have never seen the subject generator, but if it is a "mechanical" diesel, all it needs is fuel, air and adequate cranking speed to run. Check the fuel solenoid if it has one, usually they require voltage to run, remove voltage to stop. See what it does in both auto and manual cranking attempts.

Since you mention a mag pickup, I'll guess you have electronic governing with a rack/throttle positioner, the same goes for it. See what happens in auto and manual cranking.
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ceb58
mastr;8038 wrote:
I have never seen the subject generator, but if it is a "mechanical" diesel, all it needs is fuel, air and adequate cranking speed to run. Check the fuel solenoid if it has one, usually they require voltage to run, remove voltage to stop. See what it does in both auto and manual cranking attempts.

Since you mention a mag pickup, I'll guess you have electronic governing with a rack/throttle positioner, the same goes for it. See what happens in auto and manual cranking.


Yes, electronic governor. It is a Generac with the 3.0L John Deer. The voltage from the mag pick up is between 26-29v, the voltage from the mag pick up for the RPM sensor is 1.5v. Will recheck every thing after I go back to work next week. Just looking for ideas.
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bronco
I assume this is a 2 wire start? If it is check the 18 pin conector (sometimes they come lose or wires are not seated)
in the lower box and the 2 wire start term. in there also (upper right coner). Then try to jump 178/183 in ats. same prob. then try in lower box, works ? wires bad between ats and gen. then you might want to adjust control board. If this unit has the electroinc gov. that looks like a small soup can on the side of the engine check dc voltage it must be 10 vdc or better to turn on.
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ceb58
bronco;8075 wrote:
I assume this is a 2 wire start? If it is check the 18 pin conector (sometimes they come lose or wires are not seated)
in the lower box and the 2 wire start term. in there also (upper right coner). Then try to jump 178/183 in ats. same prob. then try in lower box, works ? wires bad between ats and gen. then you might want to adjust control board. If this unit has the electroinc gov. that looks like a small soup can on the side of the engine check dc voltage it must be 10 vdc or better to turn on.



Found the problem. The unit has a Woodward elect. gov. During crank on auto was getting around 9.4vdc on the bat+ bat- term. During crank on man. was getting 10.6vdc. Unhooked wire 150 going to solenoid for the glow plugs. Voltage back to normal on auto. Battery had been in around two years changed batt. and sine the gen. has a block heater we left the glow plugs disabled.
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bronco
Good job
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ceb58
bronco;8089 wrote:
Good job


Thanks and thank you for the ideas
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