1999 555E Cab Heat

[stillwater]

We changed the antifreeze in our 1999 555E Backhoe the other day and now the heat in the cab does not sem to be as warm. We checked lines and heater hoses etc. and everything was OK. Has anyone experienced this?? Could it have something to do with the antifreeze/water ratio.

Thanks /forums/images/graemlins/confused.gif

 

[Mark_in_NH]

</font><font color="blue" class="small">( Could it have something to do with the antifreeze/water ratio. )</font>

Could be. I have been told that with a House heating system using antifreeze, that if you don't use "enough" antifreeze, then of course you don't get adequate freeze protection.
If you use "to much" antifreeze, the mix won't heat properly.
I guess it's possible that a tractor / vehicle could act the same way.

 

[thcri]

Anit-Freeze will make the heat transfer not as great going both directions. Absorbing the heat in the block and releasing it in the heater coil. However, not enough in your case to make much difference. Check the temperature drop from the supply water to the outlet water. If that is too great of a difference than more than likely you don't have enough flow. Similar situation I had many many years ago on my Ford Mustang. I drained the radiator did some minor flushing and when I put everything back together I had no heat. Thought it was vapor locked which could be your case also, but eventually we found that the heater core basically filled up with crud and I had no flow. We put a new heater core in as it was cheap at that time and I had heat like I never had before.

just an idea,


murph


murph

 

[mahlers]

From the symptoms you described, murph's on the mark. I'd first make sure all the air is bled out of the heater core, and then check to see if any crud is blocking anything. Might also be a good idea to check the core to see if the NH builders didn't put it upside down (or reverse the hoses) - inlet needs to be on the low side, and outlet on the top. If they did it bass ackwards, you'll have an air lock for a few hours of use until it all works itself out.

Didn't mention the ratio of antifreeze and water that was used - but even at a worst case scenario (100% antifreeze), your heat transfer will only decrease by around 15%. I doubt that would be really noticeable, so the above things are most likely

 

[jinman]

Do you have a temperature gage for the engine? Is it in the normal range? If the engine temperature is low there is a good chance that your thermostat is stuck open or has some foreign material holding it open. If the engine temperature is normal, then something must be restricting the flow as others have suggested.