How to Install Dishwasher Upper Spray Arm Pivot Shaft 4370ED3006A in a Kenmore Elite Dishwasher

Quick answer: Slide the upper rack out, unscrew or unclip the spray arm from its hub under the rack, remove the worn pivot shaft and clean the hub. Press 4370ED3006A into the hub with its shoulder facing the arm, refit the spray arm, and check that it spins freely by hand before running a cycle.

The upper spray arm on a Kenmore Elite dishwasher rides on a short pivot shaft that carries water from the rack's water inlet into the arm while letting it rotate. Part 4370ED3006A is that shaft. When it wears, the arm droops, wobbles, rubs on the rack or stops turning altogether, and you get grit and food film on the glasses in the upper rack while the lower rack comes out clean. These Kenmore Elite dishwashers are built by LG, which is why this part number and its fitment list include the Kenmore 72214693610 alongside LG models like the LDF7561ST and LDT9965BD00.

This is one of the easier dishwasher repairs because the upper spray arm assembly is attached to the underside of the upper rack, not to the tub. You can pull the rack out entirely and work on a countertop in good light. No power or water disconnection is needed for most of the job, though we still recommend switching the machine off so nobody starts a cycle while the rack is out.

See part details and every compatible model: 4370ED3006A

⚠️ Safety First
  • Turn the dishwasher off at the control panel so a cycle cannot start with the rack removed.
  • Let the tub cool if a cycle ran recently; the rack and arm hold heat.
  • Wear gloves. Rack wires with worn coating and the shaft's snap edges can cut fingers.
  • Do not force the arm off its hub; a broken hub means replacing the whole rack water inlet assembly.

Tools and Parts You Need

  • Phillips screwdriver (some hubs use a screw, others a twist-lock)
  • Needle-nose pliers for stubborn clips
  • Small flashlight to inspect the hub
  • Old toothbrush and white vinegar for scale
  • Clean towel to work on
  • Work gloves

Step-by-Step Installation

  1. Pull the upper rack Open the door, slide the upper rack fully out and release the rail stops at the front of each rail so the rack lifts off. On most of these models the stops flip up with a finger; some use a small clip you pinch.
  2. Locate the spray arm hub Turn the rack over on a towel. The upper spray arm is mounted under the center of the rack on a hub fed by the water inlet at the rear. The pivot shaft is the short cylinder the arm spins on.
  3. Remove the spray arm Unscrew the retaining nut or press the release tab and lift the arm off the hub. Note which way the shoulder of the old shaft faces before removing it.
  4. Extract the old shaft Pull the worn pivot shaft straight out of the hub. If it has snap fingers, squeeze them with the pliers while pushing. Check for cracks in the hub bore while it is empty.
  5. Clean the hub and arm bore Scrub scale and food residue from the hub and inside the arm with the toothbrush and vinegar. Rinse and dry. Grit here is what wore the old shaft in the first place.
  6. Fit 4370ED3006A Push the new shaft into the hub with the shoulder facing the arm, exactly as the old one sat. Press until it clicks or bottoms out. It should sit square with no rock.
  7. Refit the spray arm Set the arm over the shaft, tighten the nut or engage the lock, and spin the arm by hand. It should turn a full revolution smoothly without contacting the rack wires.
  8. Reinstall the rack and test Slide the rack back onto its rails, reset the stops, and run a short cycle. Open the door after a few minutes and confirm the arm has moved and the upper rack items are wet.

Fit Checks Before You Call the Job Done

  • The shaft is fully seated in the hub and cannot be pulled out by hand.
  • The spray arm spins freely through a complete rotation with no drag.
  • The arm sits level and clears the rack wires and the rack's water inlet.
  • The retaining nut or lock is fully engaged.
  • The rack water inlet still docks into the tub's supply port when the rack is pushed in.

Common Mistakes to Avoid

Installing the shaft backwards With the shoulder toward the rack, the arm rides too high and jams. Match the orientation of the old part.

Not cleaning the hub Leaving scale inside means the new shaft wears just as fast. Two minutes of scrubbing prevents a repeat job.

Overtightening the arm nut The nut locates the arm; it does not clamp it. Overtightening stops rotation.

Forgetting the rail stops Rolling the rack in without resetting the stops lets it fly off the rails the next time you pull it.

Blaming the shaft for a clogged arm If holes in the arm are packed with debris, the arm will not spin even with a new shaft. Clear the jets first.

Troubleshooting After Installation

Arm still does not spin during a cycle Check that the rack water inlet is docking with the supply port at the back of the tub, and that the spray arm jets are clear.

Arm hits the rack when it turns The shaft is not fully seated or is reversed. Remove the arm and reseat the shaft.

Water spraying from the hub instead of the arm The retaining nut is loose or the arm was not seated over the shaft flange. Refit and tighten.

Upper rack items still dirty Look at the water inlet tube on the rack and the tub's supply port for blockages, and check the lower spray arm is not blocked by tall items.

Care Tips After the Repair

  • Rinse the upper spray arm under a tap every few months and clear its jets with a toothpick.
  • Run a dishwasher cleaner or a cup of vinegar on an empty cycle if you have hard water.
  • Do not let tall items in the lower rack strike the upper arm; that side load wears the shaft.
  • Check that the arm spins freely each time you clean the filter.

Compatible Models (Sample)

This part is listed for 67 Kenmore Elite models in our fitment data. Always confirm your exact model number on the appliance's rating plate.

Repair Difficulty and Time

Difficulty: Easy. Typical time: 15 to 30 minutes.

Frequently Asked Questions

Does 4370ED3006A fit LG dishwashers as well as Kenmore Elite?

Yes. Kenmore Elite dishwashers such as the 72214693610 are LG-built, and the same shaft fits LG models including the LDF7561ST, LDF7551ST and LDT9965BD00.

Do I need to shut off the water?

No. The shaft is on the rack assembly, which is removed from the tub. Only make sure a cycle cannot start.

The spray arm itself is cracked. Does this part fix that?

No. The shaft only replaces the pivot. A cracked arm needs its own replacement arm from the rack assembly parts list.

How long should the new shaft last?

With clean water and clear jets it typically outlasts the rest of the rack. Hard water and grit shorten its life.

Final Checklist

  • Dishwasher switched off
  • Upper rack removed and turned over
  • Spray arm detached and old shaft pulled
  • Hub and arm bore cleaned of scale
  • 4370ED3006A seated with shoulder toward the arm
  • Arm refitted and spins freely by hand
  • Rack reinstalled with rail stops reset
  • Short cycle run and spray confirmed

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