Mahindra 3550 Problems

   / Mahindra 3550 Problems #11  
Thanks for tip on the reset. I'll call the dealer and get on the list for a phone call when the kits are available. I would guess if they said November it's likely going to be December! I did notice as it's getting colder outside I am getting less heat. By the feel of it, I would guess that with winter temps the heat wouldn't be enough to keep the cab warm as it stands now.

Did you get the fuel/limp mode issue corrected?
 
   / Mahindra 3550 Problems
  • Thread Starter
#12  
Nope, not yet corrected. There's another user here that had his fuel rail replaced, trying to fix the issue. I'm waiting to hear if that works before doing that on my tractor. It's a fairly involved process, I'd rather they be confident it'll fix it before I let them dig into the engine that far. To this point, my dealer has no ideas. I wouldn't even bother fixing it if I could reset the code myself, but for now it requires dealer only software.
 
   / Mahindra 3550 Problems #13  
That's too bad. I hope I don't run into the same thing. The only issue I have aside from over cooling is that I shorted out the parking lights trying to fix a loose bulb. My fault. Can't fine ANY fuse anywhere. It also knocked out the lights behind the gauges. The hazard flashers work, directions work, headlights work, but not the white marker lights up front. Can't figure out where on earth the fuse is. No bad fuses on the fuse bus down to the left of the steering column.

I have about 62 hours.
 
   / Mahindra 3550 Problems
  • Thread Starter
#14  
Thanks for tip on the reset. I'll call the dealer and get on the list for a phone call when the kits are available. I would guess if they said November it's likely going to be December! I did notice as it's getting colder outside I am getting less heat. By the feel of it, I would guess that with winter temps the heat wouldn't be enough to keep the cab warm as it stands now.

Did you get the fuel/limp mode issue corrected?

Jeff,
I had a Mahindra Rep at my house earlier this week. They still have not developed a kit.

That being said, I analyzed the cooling system myself to see if there were areas that could allow extra flow. There is a bleed hose that runs from the EGR cooler to the top of the radiator - though the hose is fairly small, I speculated that flow through this hose could be enough to drop the temp, since it completely bypasses the thermostat. With the dealer rep there, with the cap off the radiator and engine running, I pinched the hose by hand. The swirling coolant at the top of the radiator stopped with the hose pinched, which made me think that it was indeed that hose. The rep took some measurements with his computer, and he verified the engine was running under-temperature. With his blessing, I then pinched off the hose with vise grips, and the temperature increased slowly to normal operating temperature.

After he was gone, I installed a restrictor in that hose. It is just a piece of steel with a pin hole in it - just enough to allow the coolant to drip through. Now the engine warms up and runs at a consistent temperature.

Mahindra was having a meeting I think today to discuss this issue. I sent photographs and a detailed explanation of what I implemented to the rep, for him to present at this meeting. If I hear anything additional, I will be sure to update.

Also, on the fuel rail issue - some of the codes that were thrown on my machine had been set at 0 rpm, 0 torque, etc. Fairly strange, and makes me think it's not a mechanical problem. I am curious if this is the case on other 3550's.

-Jeff
 
   / Mahindra 3550 Problems #15  
Great news! Thank you for the reply. If you have pics of the steel restrict you used that would be great. I wonder if adding the restriction will affect the EGR cooling or anything else.
 
   / Mahindra 3550 Problems
  • Thread Starter
#16  
Great news! Thank you for the reply. If you have pics of the steel restrict you used that would be great. I wonder if adding the restriction will affect the EGR cooling or anything else.

I can send them via email. I don't want to put them up on the forum until I hear something back from Mahindra. This fix will not affect EGR cooling at all - the actual EGR cooler lines are much larger, and I didn't touch them. The feed line for the EGR comes from right below the thermostat, and the return is in the lower radiator hose. The line to which I added a restrictor is just an air bleed line, to ensure air is not trapped at the high point of the EGR cooler. The flow through this hose should be very small, just enough to ensure the air is bled out of the system. With the restictor, the flow is reduced to a drip every second or so.
 
   / Mahindra 3550 Problems #19  
Got them thank you! Did you use welding wire because you couldn't drill a small enough bleed hole in the steel? I've got some 3/8" round stock and a drill press. I could get a pretty small hole. I think.but looks like it's gotta be awful small. How'd you get the wire to stay in the steel?
 
 
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