KitchenAid Stand Mixer: Troubleshooting Loud Grinding... | appliancefaults.com

Technical Background:

KitchenAid stand mixers utilize a complex gear system to transfer power from the motor to the attachments. These gears require proper lubrication and alignment to operate smoothly. The motor provides the power, transferring that through the gears and planetary to drive beaters or other attachments. Wear in these gears, poor lubrication, or obstructions can cause noise.

Symptoms:

The KitchenAid stand mixer emits a loud grinding noise, particularly when operating at high speed. The noise may be intermittent or constant. The mixer may also vibrate excessively.

Possible Causes:

Worn or damaged gears within the gearbox.
Insufficient lubrication in the gearbox.
Loose or damaged planetary assembly.
Motor bearing failure.
Foreign object lodged within the gear mechanism.

Solution:

1

Unplug the mixer from the 120V AC outlet.
2

Remove the planetary assembly using a flathead screwdriver. This typically involves loosening a setscrew.
3

Inspect the planetary gears for wear or damage. Replace if necessary. Check for broken teeth or excessive play.
4

Remove the rear cover using a 1/4-inch nut driver. This provides access to the main drive gear and motor.
5

Inspect the main drive gear for wear or damage. Check motor bearings for play. If bearings are worn, consider motor replacement.
6

If the gears appear dry, apply food-grade grease to all gears within the gearbox. Use a generous amount.
7

Reassemble the mixer and test on high speed. If the noise persists, further disassembly and inspection may be required.

Safety Warning:

Always unplug the mixer from the electrical outlet before performing any maintenance or repairs. Lock Out/Tag Out procedures should be followed to ensure the mixer is not accidentally powered on during repairs. Be cautious of sharp edges and moving parts during disassembly and reassembly.

Prevention:

Regularly inspect and lubricate the gears within the gearbox. Avoid overloading the mixer with excessively heavy dough or ingredients. Clean the mixer after each use to prevent food particles from entering the gear mechanism.

Expert Tip:

A small amount of grease on the planetary shaft can help prevent seizing. A service mode does not exist on these older mixers, but you can often diagnose motor issues by checking amp draw during operation. Normal amp draw on high speed, without a load, should be between 1 and 2 amps on 120V AC.

Follow-up Questions:

Frequently Asked Questions

•What type of grease should I use to lubricate the gears?

Use only food-grade grease specifically designed for kitchen appliances. This type of grease is non-toxic and safe for contact with food.

•How often should I lubricate the gears in my KitchenAid mixer?

Ideally, lubricate the gears every 6 months to a year, or more frequently if you use the mixer heavily.

•Where can I purchase replacement gears for my KitchenAid mixer?

Replacement gears can be purchased from appliance parts retailers, online marketplaces, or directly from KitchenAid's website.

KitchenAid Stand Mixer: Troubleshooting Loud Grinding Noise on High Speed

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What type of grease should I use to lubricate the gears?

•How often should I lubricate the gears in my KitchenAid mixer?

•Where can I purchase replacement gears for my KitchenAid mixer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: