heymccall
Senior Member
We run all of our equipment air conditioners with all the doors/ windows open. I don't see freeze over on any of them.
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Help, I’m ac dumb.
- Thread starter JohnnyCarcinogen
- Start date
heymccall
Senior Member
Where'd you get the 1.7kg charge amount number from?
JohnnyCarcinogen
Active Member
The data plate that tells me the AC charge inside the cab.
heymccall
Senior Member
How about that serial number, then?
JohnnyCarcinogen
Active Member
it's 1040 pm CST. I don't have to actually start moving equipment until 530 am tomorrow, so how about some patience?
heymccall
Senior Member
Patience? Yeah, yeah, patience. I can be patient. I'm good at being patient. My babysitter is always telling my mom how patient I am. I'm really, really good at being patient. Someday, when I grow up, I'm gonna be a doctor, and I'll have lots of patients.
You forgot smileys!!! Who knows, someone might take it serious!
Nige
Senior Member
TBH until the filters (and the question does it have two or three filters has been answered) have been checked and pronounced good I wouldn't go any further than that with diagnostics, especially on a machine that works in a landfill application.
We replace both fresh air & recirc aircon filters in our large T-Series tractors every 250 operating hours, and they often come out looking like they are caked with concrete the dust on them is so hard.
We replace both fresh air & recirc aircon filters in our large T-Series tractors every 250 operating hours, and they often come out looking like they are caked with concrete the dust on them is so hard.
JohnnyCarcinogen
Active Member
Filters- it has 2. Replaced every 250.
SN- kpz03799
Sorry, all I can give you today. Looks like I’m in the shop by myself for the next week or so and I’m up past my balding scalp in iron.
SN- kpz03799
Sorry, all I can give you today. Looks like I’m in the shop by myself for the next week or so and I’m up past my balding scalp in iron.
heymccall
Senior Member
Found this
Nige
Senior Member
Ok, so it's a roof-mounted condenser. If both the fans are working and the condenser is clean then I'd suggest replacing the dryer as a first step. I'd pretty well guarantee that it's never been replaced before - we replace ours every year. The great thing is that it has self-sealing couplings so no refrigerant will be lost making the replacement. After that it's probably gauges time.
JohnnyCarcinogen
Active Member
I replaced it last year. I remember it because on this machine and our 836H had their quick disconnect dryers and lines replaced by the old mechanic with the old stile “thread on.”
JohnnyCarcinogen
Active Member
You wouldn’t happen to have a pdf of that, would you? It would be even sexier if that doc also had compressor oil type and quantity.
heymccall
Senior Member
You guys mention ac filters several times...on my cat excavators, even with religiously serviced ac filters, I still get blocked evaporators. I think I've disassembled most of them by now, to blow out the cores. Some will let me use a 90° wand to mostly clean them, usually thru the blower resistor hole.
JohnnyCarcinogen
Active Member
I really don’t want to do this. It seems like every design engineer had his wife impregnated by a mechanic, and spends the rest of life putting important things in stupid places.
heymccall
Senior Member
Here ?
JohnnyCarcinogen
Active Member
Bless you sir. The only documentation on AC we have is the previous mechanics service notes in the equipment books. The same guy who just added until the low side got frosty and the AC seemed cold. Dude taught me a lot, but a lot of his methods were based around saving as much money as possible and some of those techniques involved random modifications to machines to keep less parts in inventory.
kshansen
Senior Member
- Joined
- Mar 11, 2012
- Messages
- 11,160
- Location
- Central New York, USA
- Occupation
- Retired Mechanic in Stone Quarry
Okay, Johnny, you've got two days to read all that and get ready for the AC test latter this week!
JohnnyCarcinogen
Active Member
Looks like it’s nothing but vodka and red bull for the next two days.Okay, Johnny, you've got two days to read all that and get ready for the AC test latter this week!
walkerv
Senior Member
I run pag 100 in all sanden compressors . But to be honest i wouldnt worry about oil quanity to much as the only way to know for sure is to dismantle system flush it clean drain and refill the compressor then finally add appropriate amount of oil for all components in the system to recoat them . That usually only gets done after a compressor failure. And then the compressors already come with oil in them so only need to add for the components that are now dry. On further note the way you explain the old man mechanic, if he did stuff the way all the old guys seemed to and add a little oil on each charge up it very well could be slugged full of oil also causing cooling problems. I currently have a few truck in my fleet in suspect of that , my fix for those when i have an ac machine handy is to evac, throw out drier unhook lines from compressor use blow gun and blow thru all components to see if tons of oil comes out , hook all back up and vacumn and recharge . I usually replace expansion valve at this point also . Keep on keeping on garbage is rough did it for 8 years 5 on trucks 3 on equipment repair.You wouldn’t happen to have a pdf of that, would you? It would be even sexier if that doc also had compressor oil type and quantity.