AHU-TDI AC Compressor Stuck

Hello,

Has anyone experienced the problem of the belts getting hot after starting the engine?
It looks like the compressor coupling might be stuck. However, the inner part can still be turned. Is it the coupling itself that's stuck, or the compressor? Is there a way to fix this?
The air conditioning system is already broken. Is it possible to run the compressor without it being connected to anything, or alternatively, could the belt drive be modified using a different pulley for the water pump, so that it functions like it does in vehicles without air conditioning?

Okay, here's the translation:

Thank you.
vg

Hi,
Without knowing all the details of the compressor, if the compressor shaft can rotate along with the coupling disc, but the pulley cannot or only with difficulty, then the bearing of the pulley is seized. Have you already checked this with the air conditioning compressor removed?
Whether the pulley and bearing on the built-in compressor can be removed without opening the refrigerant circuit depends on the specific details. I recommend consulting the relevant repair manual (RLF) and parts catalog for your vehicle, which you can obtain from a VW dealer.
Vielleicht läßt sich mehr sagen, wenn Du Modell und Baujahr durchgibst. MKB was indeed a great person.
Converting to a "no-AC" system means using a different pulley for the water pump, different belt lengths, a different tensioner (bracket), and possibly a different bracket for the alternator.
hg
Herbert.

Herbert wrote:

Hi, Without knowing all the details of the compressor, if the compressor shaft can rotate along with the coupling disc, but the pulley cannot or only with difficulty, then the bearing of the pulley is seized. Have you already checked this with the air conditioning compressor removed? Whether the pulley and bearing on the built-in compressor can be removed without opening the refrigerant circuit depends on the specific details. I recommend consulting the relevant repair manual (RLF) and parts catalog for your vehicle, which you can obtain from a VW dealer. Vielleicht läßt sich mehr sagen, wenn Du Modell und Baujahr durchgibst. MKB was indeed a great person. Converting to a "no-AC" system means using a different pulley for the water pump, different belt lengths, a different tensioner (bracket), and possibly a different bracket for the alternator. hg Herbert

Correct

The pulley bearing on the AC compressor can be replaced even when it's installed. Remove the magnetic clutch, remove the retaining ring, then remove the pulley along with the bearing. Press the bearing out of the pulley. Installation is in the reverse order. Make sure to reinstall the clutch plates exactly as they were, otherwise the air gap of the clutch will no longer be correct.

Converting a system to "non-air conditioning" is usually much more complex than anticipated. Almost always, the belt drive is routed differently, often significantly so. This can involve different pulley sizes on the crankshaft, different belt guides and rollers, a different tensioner, and almost always a different belt. It's not uncommon for "non-air conditioning" conversions to also include a different alternator, which further increases the complexity of the conversion. Therefore, repairing the actual damaged component is often the more cost-effective solution, especially if the problem is only with the compressor pulley or its bearing.

Well, I wouldn't generalize it like that. For example, it's relatively quick to do on a Golf IV.

The author of the article has a Golf III AHU (which is essentially a 1Z, right?). If there are so many interchangeable parts, they're probably available at a junkyard. Before I start spending money on a climate control system that's probably not working, especially with 320,000 km on the clock, you have to think about it.

Hello, thank you for the information. It's a Volkswagen Golf III TDI with engine code AHU.

According to my information, only the plate of the Wapu needs to be changed.
The engine has two belt drives: one for the alternator and water pump, and the second for the power steering and water pump.

When you replace the pulley on the Wapu (water pump), it can sometimes also run on the belt of the alternator (Lima).
Should it work, or is there any other information available?
The car has now exceeded 350,000 kilometers. My main goal is to keep it running as cheaply as possible.

Sure, here is the translation of the text from German to English:

"vg" is an abbreviation for "very good". It is often used in online forums and chat rooms to express agreement or approval.
Peter.

bindpe wrote:

Hello, thank you for the information. It's a Golf III TDI with engine code AHU. According to my information, only the plate of the Wapu needs to be changed. The engine has two belt drives: one for the alternator and water pump, and the second for the power steering and water pump. When you replace the pulley on the Wapu (water pump), it can sometimes also run on the belt of the alternator (Lima). Should it work, or is there any other information available? The car has now exceeded 350,000 kilometers. My main goal is to keep it running as cheaply as possible. Sure, here's the translation: "vg" is an abbreviation for "very good." It is often used in online forums and social media to express approval or agreement. Peter

Yes, it should be possible, but I don't know the part number for the pulley from a WP (water-cooled) engine without air conditioning.

Hi,
Please check the KRR control panel options for models with and without a compressor. You may need different brackets, see above.
hg
Herbert.

Hello.
I checked with my friend, but unfortunately, it was already dark. However, I can confirm that the AHU TDI engine uses a configuration with one belt for the alternator and water pump, and a separate belt for the power steering.
The only difference I could immediately notice was that, unlike mine, it doesn't have a freewheel mechanism. But that shouldn't be a problem, right?

I'll definitely take another look at the clamps tomorrow.

Okay, here's the translation:

Thank you.
vg

Update: The pulley has part number 028121031K.

hello
"The disc with the part number mentioned above fits, at least."

Can anyone tell me how to remove the A/C compressor?
I've already removed the two long screws in the front, but unfortunately, it won't budge even a millimeter.
THANK YOU.

Simply use a flathead screwdriver or a thick piece of metal to pry it out from the holder, pushing it in the direction of travel.

Sure? I've already removed those two screws (-11-). I found the following information online:

Quote:

Compressor Removing: Loosen the hexagon bolt

-9- a couple of turns and knock back the threaded sleeve on the compressor. Then remove the hexagon bolts. }


What does the "-9-" refer to?

Okay, here's the translation:

Thank you.


EDIT Autoservice. Graphic removed due to copyright issues.

Hello,

I would like to thank you again. The installation went smoothly!

Thank you VERY MUCH for the feedback .