How to Replace LG Washing Machine Shock Absorbers (4901ER2003A)

LG front-load washing machines use four hydraulic shock absorbers (part 4901ER2003A, sold as a set of 4) to dampen drum movement during the spin cycle. These absorbers connect the outer tub assembly to the base frame and prevent the drum from banging against the cabinet walls during high-speed spin (up to 1,400 RPM on LG models). When they wear out, you experience excessive vibration, loud banging during spin, machine walking across the floor, and UE (Unbalanced) error codes.

Always replace all four absorbers as a complete set. Mixing old and new absorbers creates uneven damping that can actually worsen vibration compared to four uniformly worn ones. The replacement takes 30-45 minutes and primarily involves bottom access.

Before You Start

• Tools needed: Needle-nose pliers, channel-lock pliers (alternative), flat-blade screwdriver, towels
• Parts needed: Shock absorber set 4901ER2003A (set of 4, $35-65)
• Time required: 30-45 minutes
• Difficulty: Intermediate
• Safety warning: Disconnect power. Drain all water through the front pump filter. The machine must be tipped on its back — protect the rear panel and ensure the area is clear.

Step-by-Step Instructions

Step 1: Prepare the Machine

Unplug the washing machine. Open the front service panel and drain all residual water through the pump filter (into a pan). Close the filter when done. Pull the machine away from the wall to a position where you have room to tip it backward.

Step 2: Tip the Machine onto Its Back

Place a thick blanket or moving pad behind the machine to protect the rear panel and floor. With a helper, carefully tip the machine backward onto the blanket. You now have full access to the underside of the machine where the shock absorbers are visible.

Alternatively, on some LG models you can access the shock absorbers from the rear (remove rear panel) without tipping. However, bottom access provides the best working angle for retaining pin removal.

Step 3: Identify the Shock Absorbers

Looking at the underside, you will see four shock absorbers running at angles from the tub assembly (upper connection) to the four corners of the base frame (lower connection). Each absorber is a cylindrical tube approximately 8-10 inches long with ball-and-socket joints at both ends, held in place by metal retaining pins.

Inspect the absorbers: worn ones may show oil leaking from the cylinder body, rubber bushings that are cracked or perished, or excessive play in the ball joints. A healthy absorber should resist compression firmly when pushed — worn ones compress easily.

Step 4: Remove the First Absorber

Start with any absorber. Locate the retaining pin at the lower (base frame) ball joint. The pin is a metal clip that passes through the socket housing, locking the ball in place. Using needle-nose pliers, grip the pin end and pull it straight out. On some models, the pin has a bent end that must be straightened first.

With the pin removed, the ball joint is free. Pull the absorber's lower end out of the socket. Then do the same at the upper (tub) end — remove the retaining pin and free the ball joint. Remove the old absorber.

Step 5: Install the New Absorber

Position the new absorber with the correct end up (they are directional — the thicker rubber bushing end typically connects to the base frame, the thinner end to the tub). Seat the upper ball into the tub socket first and insert the retaining pin until it snaps into place. Then seat the lower ball into the base frame socket and insert its retaining pin.

Verify both pins are fully engaged — you should feel them click past the retention point. A partially inserted pin can pop out during spin, causing the absorber to disconnect and the tub to swing freely.

Step 6: Replace Remaining Three Absorbers

Repeat Steps 4-5 for each remaining absorber. Work systematically (clockwise or counter-clockwise around the tub) to ensure you do not miss any. After all four are installed, push on the tub from various angles to verify it rebounds evenly in all directions without free-swinging at any point.

Step 7: Right the Machine and Test

With a helper, carefully lift the machine back to upright position. Push it back into position, reconnect power, and re-level the machine using the adjustable feet (check with a bubble level). Run a Rinse and Spin cycle with a small balanced load (two bath towels). Observe through the entire spin ramp-up — vibration should be minimal and no UE error should appear.

Step 8: Break-In Period

New shock absorbers require a brief break-in period (3-5 cycles) to reach their optimal damping characteristics. You may notice slightly more movement than expected during the first few cycles. If excessive vibration continues after 5 cycles, verify the machine is level and that all retaining pins are secure.

Troubleshooting Common Issues

If vibration persists after absorber replacement:

• Machine still vibrates: verify all 4 retaining pins are fully seated. Also check that the suspension springs at the top of the tub are all connected — a detached spring mimics worn absorbers
• UE error continues: the issue may not be absorbers. A cracked spider arm (3-arm drum support) causes wobble that no absorber can compensate for. Remove rear panel and inspect spider arms for cracks
• One absorber does not fit: LG occasionally changes socket geometry between model years. Verify part number 4901ER2003A matches your specific model
• Machine walks across floor: this is a leveling issue in addition to absorber replacement. Re-level all four feet and consider anti-vibration pads

When to Call a Professional

• Spider arm cracks require drum extraction (specialized job)
• Tub bearing failure causes vibration similar to worn absorbers — requires professional press tools
• If the base frame mounting sockets are cracked or damaged, replacement may require frame repair

Cost Comparison: DIY vs Professional

Need Professional Help?

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• lg appliance repair
• washing machine repair cost guide

FAQ

Q: How do I know if my LG washer shock absorbers need replacing? A: Press down firmly on the drum through the open door. It should compress less than half an inch and return slowly without bouncing. If the drum bounces, moves more than an inch, or you hear the tub banging against the cabinet during spin cycles, the absorbers are worn.

Q: Why must I replace all four shock absorbers at once? A: Uneven damping is worse than uniformly worn damping. If only 1-2 absorbers are new, they resist movement more than the worn ones, causing the tub to pivot rather than absorb evenly. This creates a rocking motion that can be worse than the original vibration.

Q: How long do LG shock absorbers last? A: Typically 8-12 years in normal residential use. Factors that shorten lifespan include: consistently overloading the machine, running many spin cycles per day, and an unlevel machine that places disproportionate stress on specific absorbers.

Q: Can worn shock absorbers damage other components? A: Yes. Worn absorbers allow excessive tub movement that stresses the door boot seal (causing tears), loosens the rotor bolt through vibration, and accelerates bearing wear. Replacing them promptly prevents cascading failures.

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