Caterpillar C6000:
no start cold only

Hey guys, I have this here cat c6000 that will not start when cold outside. I have fuel and spark, It's like it's not "choking". It's a nissan 2.5 engine, with solenoids all over the mixer. When I poured hot water on the solenoids, it started. Does anyone have any helpful info they could maybe lead me into the right direction? By the way, it's -10 celcius here. Not overly cold, this thing should start.
  • Posted 27 Mar 2008 09:37
  • Discussion started by wpg_gearhead
  • Manitoba, Canada
Showing items 1 - 8 of 8 results.
Thanks edward t , you were right on the money with that one, It was the injector. Thanks I owe u one.
  • Posted 28 Mar 2008 08:14
  • Reply by wpg_gearhead
  • Manitoba, Canada
this one won't even clear the codes if the battery goes dead, so no, you don't have to relearn after the battery goes dead. I don't know of any way to accurately check the injector with an ohm meter, It is the one held in with 4 screws, and the fuse you mention, and you just take out the screw, and pull it straight out and feel the plunger.
  • Posted 28 Mar 2008 05:40
  • Modified 28 Mar 2008 05:41 by poster
  • Reply by edward_t
  • South Carolina, United States
hey Edward? you mentioned a computer relearn, If the battery goes dead does the computer have to be relearned? Most have a computers have a internal memory but it's just a thought.
  • Posted 28 Mar 2008 02:42
  • Reply by wpg_gearhead
  • Manitoba, Canada
what is the large solenoid the rear of the mixer, it is round shaped with a inline 5 amp fuse attached to it? It is located where the propane comes into the mixer along with a few sensors.
  • Posted 28 Mar 2008 01:23
  • Reply by wpg_gearhead
  • Manitoba, Canada
I'm used to the impco lpg systems, I've never seen this new design yet, It has a nikki vaporizer so is this a aisin or nikki system? ANyways, To me the front of the engine is the water pump side too. I was just suggesting this black unit on the mixer for a starting point on where to look. how do you test the solenoids if they are stuck? Is there a ohms specification?
  • Posted 28 Mar 2008 00:54
  • Reply by wpg_gearhead
  • Manitoba, Canada
I think you have pretty much described the main injector, you may find that just taking it out and putting it back in cures the problem. (plunger might be "hung up").
However to me, the "front of the engine is the water pump side, not the bell housing/transmission side, which would mean (in my memory) the injector was towards the front of the truck, which is opposite the front of the motor.
  • Posted 28 Mar 2008 00:22
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"
We get our propane from a propane dealer in town, more than likely filled from a bulk tank but all of our lift trucks use the same tanks we just rotate them. So that likely is not the problem. BUT, Is this the large black solenoid at the bottom of the mixer at the front of the engine? Not sure if the computer was changed recently, hopefully not as I do not have the laptop.
  • Posted 28 Mar 2008 00:09
  • Reply by wpg_gearhead
  • Manitoba, Canada
Try replacing the large solenoid on the mixer, if you have a 'known good' one. they stick sometimes, usually when new. if this is a new truck, or the computer has been changed there is a "learn" procedure that needs to be run with a laptop computer.
ALSO what is the temp when filling the LPG tank, and is the tank filled from a bulk tank (outside) without a pump? (gravity feed). if you fill the tank when the tank is warm, (say from working inside at 3 PM) but the bulk tank cold, (from sitting outside) then when the truck sits outside overnight, the pressure may be changing quite a bit.
  • Posted 27 Mar 2008 21:35
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"

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