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How to Install a Self-Locking Nut on a Ball Joint with a Tapered Stud

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Problems Tightening Self-Locking Nut

When installing the self-locking nut on a ball joint with a tapered stud, it can be difficult to get the nut properly tightened. Featuring two stakes at the top, overcoming resistance in the tight space of the suspension assembly is a challenge. This can be an issue with MOOG® lower ball joints like the K8607T for the 1999-2019 Ford F-250/F-350 Super Duty and the K500141 for the 2005-2019 Ford F-450/F-550 Super Duty.

self-locking-oe-moog-ball-joint-nuts

Old OE Nut (Left) vs. New MOOG Nut (Right)

To get the nut properly tightened, there are two different methods that can be employed – using a jack or using the old ball joint hardware.

Tightening Nut Using a Jack

STEP 1

Place jack under knuckle.

STEP 2

Jack knuckle up until taper engages with axle.

jack-under-steering-knuckle-step-2

STEP 3

Tighten to the first toque specification in the reassembly procedure.

STEP 4

Lower jack and proceed with reassembly procedure to install components.

Tightening Nut Using Old Ball Joint Hardware

STEP 1

Install old nut.

STEP 2

Tighten to the first torque specification in the reassembly procedure.

tighten-ball-joint-nut-first-torque-specification-step-2

STEP 3

Remove old nut.

STEP 4

Install new nut.

install-new-self-locking-ball-joint-nut-step-4

STEP 5

Tighten the new nut to the first torque specification in the reassembly procedure.

STEP 6

Continue with reassembly procedure to install components.


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The content contained in this article is for informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic. We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content.

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