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What have you done to your HMMWV today/lately

FlameRed

Well-known member
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Once again, @Mogman you seem to be correct. I believe I did not flush it enough the first time the compressor crapped out. I tried flushing it out a second time but it was too late.

Yes, I disconnect all the lines and flushed everything in the opposite direction of normal refrigerant flow. I needed two quarts of flush which is a lot I think.

At least I am getting well practiced at flushing it out and replacing the compressor! The compressor and new receiver dryer is about $150 plus another 2 quarts of flush and R134.

And now at least I have the actual AM General AC factory bracket installed instead of the redneck engineered one it came with from the previous owner. Another "while I am in there..." thing.
I continue to make one step forward, three steps back in my AC repair. Thank you sir, may I have another! :unsure:

I get another two quarts of AC flush and flush it a second time. All pipes, all connections, in the reverse of coolant flow. a new compressor, second one, and new receiver dryer.

This time I install a high side filter to catch whatever garbage might still be in there. Rating says it was leak free unless you try to remove it and reinstall it. BS :burn:

I let it sit on vacuum for 3 hours, and shove in a little R134 to test it for leaks. Sure enough the POS filter has a small leak. Seems like the filter is a real POS. So I decide to put in a minimum charge and let the filter catch any potential crapulance floating around still. Besides, I still do not know if the expansion valve is clogged?

I start the rig and turn on the AC to start charging it up and the AC fuse blows! I replaced the 10 amp fuse with a 15 and all good.

So after putting in a couple partial cans of 134, Got the low side to 30 pounds at 80 degrees ambient temp and the air is blowing cold out of the vent. So I guess whatever garbage was blocking the expansion valve I managed to get out.

Let me see how much refigerent I loose overnight. I am guessing all of it so I end will remove the POS filter and install a splice coupling instead and retest it for leaks again, and fill it completely.

Finger crossed...
 
Last edited:

FlameRed

Well-known member
Steel Soldiers Supporter
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Location
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I would put a filter on the low side to catch any crap before it gets into the compressor.
The filter I found specifically stated it was for the high side and should be spliced into the output of the compressor before anything else.

The only filter I found, that apparently leaks, is from 4 Seasons Air, and it also sold under the GM Delco label at a higher price of course.



I did not see any filter that stated it was for low side. Actually, I did not find any other in-line AC filter at all!
 

FlameRed

Well-known member
Steel Soldiers Supporter
325
487
63
Location
Florida
I continue to make one step forward, three steps back in my AC repair. Thank you sir, may I have another! :unsure:

I get another two quarts of AC flush and flush it a second time. All pipes, all connections, in the reverse of coolant flow. a new compressor, second one, and new receiver dryer.

This time I install a high side filter to catch whatever garbage might still be in there. Rating says it was leak free unless you try to remove it and reinstall it. BS :burn:

I let it sit on vacuum for 3 hours, and shove in a little R134 to test it for leaks. Sure enough the POS filter has a small leak. Seems like the filter is a real POS. So I decide to put in a minimum charge and let the filter catch any potential crapulance floating around still. Besides, I still do not know if the expansion valve is clogged?

I start the rig and turn on the AC to start charging it up and the AC fuse blows! I replaced the 10 amp fuse with a 15 and all good.

So after putting in a couple partial cans of 134, Got the low side to 30 pounds at 80 degrees ambient temp and the air is blowing cold out of the vent. So I guess whatever garbage was blocking the expansion valve I managed to get out.

Let me see how much refigerent I loose overnight. I am guessing all of it so I end will remove the POS filter and install a splice coupling instead and retest it for leaks again, and fill it completely.

Finger crossed...
Can HMMWV be possessed? So today I go out preparing to remove the filter that leaked yesterday. The system is very low so most of it leaked out overnight. Put in enough R134 to find any leaks. Fire up the leak detector and hit every single fitting and hose again.

The leak I had yesterday at the filter is now gone - it self sealed?!?! I don't understand how that can be.

And now there is a leak at the fittings where the hoses connect to the compressor. They were sealed tight yesterday! So I tighten both the high side and the low side fittings and no leaks detected. I'll replace the o-rings on them if they leak again.

Shove in the rest of the can so the level is low, but no point in wasting more if leaks come and go!

System seems leak free now, but I'll leave it overnight and see what leaks develop. If it it has no leaks I'll add another can tomorrow.

Maybe I am going to host an exorcism!
 

Mullaney

Well-known member
Steel Soldiers Supporter
Supporting Vendor
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Location
Charlotte NC
Can HMMWV be possessed? So today I go out preparing to remove the filter that leaked yesterday. The system is very low so most of it leaked out overnight. Put in enough R134 to find any leaks. Fire up the leak detector and hit every single fitting and hose again.

The leak I had yesterday at the filter is now gone - it self sealed?!?! I don't understand how that can be.

And now there is a leak at the fittings where the hoses connect to the compressor. They were sealed tight yesterday! So I tighten both the high side and the low side fittings and no leaks detected. I'll replace the o-rings on them if they leak again.

Shove in the rest of the can so the level is low, but no point in wasting more if leaks come and go!

System seems leak free now, but I'll leave it overnight and see what leaks develop. If it it has no leaks I'll add another can tomorrow.

Maybe I am going to host an exorcism!
.
You might consider adding a can of dye to the Air system. Look under the truck too - where the back is routed. The dye might be just as easy as a leak detector...
 

Thunderbirds

Well-known member
219
289
63
Location
Northern Black Hills South Dakota
Took my old windshield to a glass shop. They are cutting two new pieces and adding gray tint. Cost is $140. Each
I hope that is the DOT approved material? I like the idea of getting the tint.

For that cost, you could get a pair shipped to you that have the DOT stamp, and are bullet resistant... I needed to replace one, but did both, and am very happy with them. My original window fell victim to a shooting practice before the truck was sold on GP. I wonder if that was an approved exercise on the part of the Marines?HMMWV6.jpg
 

Caactus

Active member
79
187
33
Location
NW Phoenix, Arizona
I hope that is the DOT approved material? I like the idea of getting the tint.

For that cost, you could get a pair shipped to you that have the DOT stamp, and are bullet resistant... I needed to replace one, but did both, and am very happy with them. My original window fell victim to a shooting practice before the truck was sold on GP. I wonder if that was an approved exercise on the part of the Marines?View attachment 932784
. You had me at bullet resistant and DOT stamp… where might you find this? The world is headed in a direction where this may be advantageous. ;)
 
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