2655 Air Conditioner went Boom

[OldTrix]

Blew out the lines- nothing in them. I found a much cheaper alternative to the OEM compressor by cross-referencing the part numbers on the stock compressor. FYI, there was a design change and instead of having a machined groove and o-ring in the rear housing of the compressor, the connection is now smooth-faced. Sealing washers are used in lieu of o-rings. AP Air in Iowa helped me out on that, and while they didn't have the lowest cost compressor, they were the only ones to list and show the sealing washers. $4.70/set. Waiting on the washers to arrive to bolt up the new compressor and see how it goes.

 

[OldTrix]

OOOOohhh-Kaaaayy. Expansion valve is shot, been searching a month for replacement. plugging in the Mahindra/TYM part number yields some interesting results, none of which match the physical block valve I removed. The dealers have no numbers for a valve, only an evaporator for $2000.

Fortunately, the valve itself has a tag on it, made by TGK, part number C33157Eo (also 52324390 on the label). No luck finding a cross-reference.

Finally, went back to AP Air Inc. in Iowa. They couldn't cross on the P/N, but we plugged in the model of tractor and it popped up their part number 903-822, which also showed the C331 number in the description.

I can't imagine any of these cab tractors having anything different in them across models, so if you're looking for a a block expansion valve for a 2500/2600 series cab model, my bet it it's going to be this part number. $27 plus shipping. Beats $2k from my helpful dealer......

 

[OldTrix]

So, all back together, and everything works as it did. Amazon sells this air comb gizmo that can fit in behind the radiator, intercooler and condenser and blow out the crud. Highly recommend the 24" version for out little tractors. A tad pricey for a tube with holes in it, but I didn't have to jig up a thin wall tube and drill tiny holes in it, either..

Amazon.com

BTW, tractor is for sale if anyone is interested.

 

[endlessmetal]

So, all back together, and everything works as it did. Amazon sells this air comb gizmo that can fit in behind the radiator, intercooler and condenser and blow out the crud. Highly recommend the 24" version for out little tractors. A tad pricey for a tube with holes in it, but I didn't have to jig up a thin wall tube and drill tiny holes in it, either..

Amazon.com

BTW, tractor is for sale if anyone is interested.

Would you be able to tell me the location of the expansion valve? Atm my Mahindra 2665 is at the shop due to the hurricane that passed caused a tree to fall on the top of the cab. The shop is trying to figure out where the expansion valve is after I told them what it was doing after the damage to the tractor. There saying it's the compressor/condenser or the whole unit is bad but that is all new. I spoke with a few people, and they all said it's the expansion valve as well as I figured that's what is the main cause of issue. The tractor ac runs great until the sun comes up then it starts to lock the compressor up smoking the belt. If you turn it off for a while it'll go back to working like normal, then it'll start to dead head again locking up the compressor. i was going to fix it myself if this Mahindra shop can't do what's needed. haven't been too happy with this tractor and the problems so far. appreciate any help or information your able to give and hopefully this helps someone else with the same issues.

 

[R134a]

Would you be able to tell me the location of the expansion valve? Atm my Mahindra 2665 is at the shop due to the hurricane that passed caused a tree to fall on the top of the cab. The shop is trying to figure out where the expansion valve is after I told them what it was doing after the damage to the tractor. There saying it's the compressor/condenser or the whole unit is bad but that is all new. I spoke with a few people, and they all said it's the expansion valve as well as I figured that's what is the main cause of issue. The tractor ac runs great until the sun comes up then it starts to lock the compressor up smoking the belt. If you turn it off for a while it'll go back to working like normal, then it'll start to dead head again locking up the compressor. i was going to fix it myself if this Mahindra shop can't do what's needed. haven't been too happy with this tractor and the problems so far. appreciate any help or information your able to give and hopefully this helps someone else with the same issues.

 

[R134a]

The expansion valve regulates the amount of refrigerant going in to the evaporator coil. I have never seen a Mahindra a/c system but I would say to look at the lines 2 lines at the evaporator core. Is there what looks like an aluminum block in between the evap and the lines ? Its either that aluminum block or a disc w/ copper winding and a bulb. Again look by the evap core. ****

"They are saying the compressor /condensor or the whole unit is bad but it is all new" The compressor locking up is a bad sign. It tells me the job was not done properly when repaired the first time. The circulation path the refrigerant takes has to be IMMACULATE. The initial failure likely had metal particles from the compressor circulate thru the system. Good 'O Boy replaces the compressor, condensor, drier, but did not replace expansion valve and/or did not flush evaporator core and/or did not follow proper flush procedures. The a/c works 1 maybe 2 seasons and then self destructs again. The problem is to find somebody who knows and cares about what they are doing. I know thats not happening where I live.

 

[endlessmetal]

The expansion valve regulates the amount of refrigerant going in to the evaporator coil. I have never seen a Mahindra a/c system but I would say to look at the lines 2 lines at the evaporator core. Is there what looks like an aluminum block in between the evap and the lines ? Its either that aluminum block or a disc w/ copper winding and a bulb. Again look by the evap core. ****

"They are saying the compressor /condensor or the whole unit is bad but it is all new" The compressor locking up is a bad sign. It tells me the job was not done properly when repaired the first time. The circulation path the refrigerant takes has to be IMMACULATE. The initial failure likely had metal particles from the compressor circulate thru the system. Good 'O Boy replaces the compressor, condensor, drier, but did not replace expansion valve and/or did not flush evaporator core and/or did not follow proper flush procedures. The a/c works 1 maybe 2 seasons and then self destructs again. The problem is to find somebody who knows and cares about what they are doing. I know thats not happening where I live.

Appreciate the reply. I'll look into this more. From a 2565 diagram shows it in the roof shell behind the fans with two lines. I let the shop know that it may possibly be there as well. i didnt get to look at it all personally yet. Hopefully its covered under insurance. This all started after the roof got crushed in during the storm when a tree fell. All that is fixed now but none of the ac was replaced yet. I'll talk with Mahindra and see what they are going to do if not ill order all the parts and handle it myself.

 

[OldTrix]

The ac expansion ("H") valve resides in the roof shell just inside the LH door. The AC lines run up the A pillar to the valve, which is secured to the evaporator. Since I did not have covered storage at the time, I removed the headliner to access it. Removing the roof is far easier to do, time-wise, and access to components will be easier as well.

 

[Hay Dude]

The expansion valve regulates the amount of refrigerant going in to the evaporator coil. I have never seen a Mahindra a/c system but I would say to look at the lines 2 lines at the evaporator core. Is there what looks like an aluminum block in between the evap and the lines ? Its either that aluminum block or a disc w/ copper winding and a bulb. Again look by the evap core. ****

"They are saying the compressor /condensor or the whole unit is bad but it is all new" The compressor locking up is a bad sign. It tells me the job was not done properly when repaired the first time. The circulation path the refrigerant takes has to be IMMACULATE. The initial failure likely had metal particles from the compressor circulate thru the system. Good 'O Boy replaces the compressor, condensor, drier, but did not replace expansion valve and/or did not flush evaporator core and/or did not follow proper flush procedures. The a/c works 1 maybe 2 seasons and then self destructs again. The problem is to find somebody who knows and cares about what they are doing. I know thats not happening where I live.

I’ve thrown a ton of money into fixing the AC system in my International truck.
After a few months, it’ll blow warm again.
Hard for me to find a good AC specialist