My new 4550 temperature gauge not working

   / My new 4550 temperature gauge not working #11  
Thanks JB1390. Have you heard if this is a problem with other Tier IVs as well?
 
   / My new 4550 temperature gauge not working
  • Thread Starter
#12  
I have read your thread about your 3550 can you send me the pictures of your mod.
I will send my email in a private message
Are you speaking about the small hose coming from the top almost center of the radiator.
I will try and get some temperature readings tomorrow with my IR thermometer.
I am not convinced it is the sensor because the Resistance is changing some.
The gauge it self never moves off the peg
 
   / My new 4550 temperature gauge not working #13  
There are a few of us 15xx series owners that have noted that the temp gauge does not seem to move even when worked. We have also noted some failures of the temp sending units. That is indicated by the "check engine" light and that gauge pegs to max temp. I don't know how much is common engineering between the series, but as others have mentioned get the dealer involved.
 
   / My new 4550 temperature gauge not working #14  
Thanks JB1390. Have you heard if this is a problem with other Tier IVs as well?

I know it is a problem on the 35 series machines, and I would suspect it affects most of them that have tier 4 emissions and an EGR system. The problem on the 35 series is just too large of a bleed hose, which passes too much coolant around the thermostat. I would suspect that a bleed hose is included in pretty much every design that uses an EGR cooler.
 
   / My new 4550 temperature gauge not working
  • Thread Starter
#15  
My 4550 has the problem when I blocked most of the flow in the the small hose from EGR to the top of the radiator the gauge comes up to just under the first mark. The dealer has the tractor now to hope fully take care of it.
 
   / My new 4550 temperature gauge not working #16  
Chuckk, got my new 4550 Friday & temp gauge is not working. Must be a common problem.
 
   / My new 4550 temperature gauge not working #17  
Chuckk, what did your dealer do to fix the temp gauge?
 
   / My new 4550 temperature gauge not working #18  
My 20 hour 4540 has the same problem. What does the "bleed hose" do and can it be blocked off?
 
   / My new 4550 temperature gauge not working #19  
My 20 hour 4540 has the same problem. What does the "bleed hose" do and can it be blocked off?

It can be restricted, but not blocked completely. It is there to remove air from the EGR if bubbles in the cooling system end up there. Your dealer should be able to provide you with a restrictor kit.
 
   / My new 4550 temperature gauge not working #20  
I took delivery of my 4550 August last year. I noticed that the temp gauge didn't move off the low peg after I after I did several hours of bush hogging and again no movement on another day after an hour or so FEL leaf mulch moving. The dealer took the tractor in during December for some warranty work. I asked about the temp gauge and the mechanic called Mahindra. They told him (as jb1390 posted) that the bleed hose was too large and passing too much coolant around the thermostat. They did a fix and I got the tractor back. During January with the temps in the mid 20s and no snow on the ground, I thought I would go out and play with my new toy and move mulch. I noticed that after an hour the gauge didn't seem to move off the lower end peg. I talked to the mechanic and he said they did run the tractor after they did the fix and the gauge did move for them. Another mechanic suggested that I put a piece of cardboard in front of the radiator to see if that would help for cold weather work. After doing some research I gave it a try. I put a cardboard piece in front of the radiator that left about 5 inches of the top of the radiator exposed. I had another opportunity to move mulch when the temperature was in the mid 20s and the gauge moved to the mid green range fairly quickly. It did the same on several other occasions. I pulled the cardboard now that the temps will make it occasionally into the 40s. However, I have had no opportunity to use the tractor because it is raining every other day and the ground is just too wet.

So what I know from using the cardboard is that the temp gauge works. I hope that, once it gets hot enough, and I use the tractor hard enough, that the temp gauge will move off the lower peg. If it doesn't I will try a smaller piece of cardboard. Depending on the ambient temp conditions there may be another dealer visit for more warranty work. At least I know how to test to see if the temp gauge is working.
 

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