I'm trying to figure out why my clutch won't engage on two-stroke. As discussed in the section on lubricants, correct oil levels are critical to system performance and component life. Ceramiclover 0 Ceramiclover 0 Advanced Member; Members; 0 63 posts; Saint Paul, MN; Posted March 13, 2015 … The low-pressure switch will prevent the AC clutch from being engaged, and the compressor will not spin. Altima SE 2012. Also flush out the ac lines if any contamination from the failed a/c compressor. Mechanic's Assistant: Are you fixing your Altima yourself? Since the Shaft of the AC Compressor is mated with the A/C Hub, once engaged, it begins to pump refrigerant in the system. Save my name, email, and website in this browser for the next time I comment. Today a cheap iPhone WiFi obd2 reader showed up and with basic software, I only got a fault code for the fuel charcoal canister vent low voltage or something like that. Worn shaft bearings will build up resistance in the wiring and fail to turn on the clutch. 1,808 Posts . Conversely, when a problem is detected where conditions are not optimum, the compressor is disengaged by the ECM. ... You'll continue to have good enough pressure so the clutch engages but not enough to cool the car. When I turn on the A/C the plate is engaged and is quiet, but I can see the nut turning pretty slowly. This would be an indication that the system has lost some or all of its refrigerant charge. After the belt is removed, spin the pulley to determine if it wobbles or has any noticeable bearing wear. Most modern compressors have a clutch and drive pulley. After the compressor is removed, clamp it in a suitable holding device with the clutch facing upward. When current flows through the coil windings, a magnetic field pulls the drive hub snug against the pulley. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Same fix. If there is something wrong with the pressure, the ac clutch won’t engage. Sometimes, when the clutch is worn, the disc is too thin and may not engage properly. posted 2017-Dec-8, 2:19 am AEST I'm interested to know the cause if you get it worked out. The clutch is not frozen -- it spins freely. … Rebuilding the system should make it like new and give you a good 10 - 15 years of life out of it. When installing the replacement clutch and hub, place the Woodruff key into the hub groove. most likely the ac compresoor is dragging if the belt is slipping. The refrigerant will leak away very slowly and air will be introduced in to the system. Depending on how it locked up, if it grenaded internally, you could be looking at a new condenser, dryer and expansion valve. (too much load on the engine?). The clutch regulates the status of the ac compressor. could it be the ralay? AC Clutch won't engage 96 Legacy. What do you suggest? Clutch pulley wobble also indicates worn shaft bearings. It repeats this never staying on. The Best TOAD Vehicles for Frequent Campers. You can also subscribe without commenting. To bypass the relay, plug the A/C back in. High pressure conditions can indicate failures such as a damaged compressor, refrigerant overcharge, condenser restriction, stuck open expansion valve, clogged orifice tube or receiver/drier. Required fields are marked *. The clutch prompts the drive shaft to start rotating once a certain rotational speed is reached and allows the engine to run without always rotating the drive shaft. Plus, you should also know how to examine the clutch to find out if it is faulty or not. 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