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JKS1610

JKS Control Arm Installation

2 Page

 

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Remove the original lower suspension arm from 

the vehicle.

 

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Proceed to step 2.  Complete installation on one 

side before starting other side.

 

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2.   SET CONTROL ARM LENGTH

 

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Determine the ideal arm length for your application  

by considering factors such as:

 

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Tire Clearance

 

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Steering Clearance

 

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Pinion Angle / Caster

 

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Factory length is 22-5/8"

 

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Max. length is 24 3/8"

 

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Set both control arms to the same length.

 

Lengthening the arms will increase caster and 

reduce pinion angle.

 

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3.   INSTALL CONTROL ARM

 

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Apply anti-seize lubricant to bolt threads of original 

mounting hardware.

 

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Establish control arm orientation. 

The arms 

should be mounted so that the bend goes inward 

(away from the tire) and the rubber bushing end 

mounts to the axle.

 

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Mount the control arm to the axle housing bracket. 

Install the original mounting bolt and finger tighten 

the nut. DO NOT torque mounting hardware until 

instructed.

 

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Mount the control arm to the frame rail bracket so 

the grease fitting is up on the flex eye. Install the 

original mounting bolt and nut. Finger tighten the 

bolt.

HINT:

 If mounting bolt is difficult to install due to misalign

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ment of Control Arm bushing with mounting bracket, either 

(1) adjust height of axle housing with hydraulic jack, (2) 

move axle housing into position with a heavy-duty ratchet 

strap, or (3) temporarily disconnect track bar until mounting 

holes align.

 

 

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4.   TIGHTEN MOUNTING HARDWARE

 

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Once both control arms have been properly 

installed, lower the vehicle to the ground until coil 

springs are supporting the full weight of vehicle.

 

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Using a torque wrench, tighten all mounting hard-

ware to 125 ft-lbs.

 

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Tighten jam nuts using JKS1695 or equivalent.

 

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5.   POST-INSTALLATION INSTRUCTIONS

 

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Installing longer lower control arms will affect the 

vehicle alignment by adding more caster.  This 

may also slightly affect the steering wheel posi-

tion, making it off-center.  It is important that the 

steering wheel is centered to avoid adverse affects 

on the vehicle's electronic stability control (ESC) 

system.  JKS recommends having the alignment 

check by a qualified alignment shop.

 

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Check mounting hardware for proper torque.

 

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Check hardware after 500 miles of use.

Maintenance

Control arm flex ends should be greased regularly as part 

of vehicle maintenance schedule or after every 4-wheeling 

trip. Lubricate using marine grade grease.  Rubber bush-

ings require no maintenance.

©2013 JKS Manufacturing, Inc & Aftermarketing, LLC

Revision Date 02/03/2014

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