JKS 9903 User Manual
INSTALLATION
INSTRUCTIONS
517-278-1226 • tech@jksmfg.com • www.jksmfg.com
491 W. Gareld Avenue, Coldwater, MI 49036
Product: B1 Body Lift™
Part Number: JKS9903
Applications: Wrangler YJ, 1987-95
Welcome
Congratulations on purchasing a new B1 Body Lift from
JKS® Manufacturing. We are committed to providing you
with the best products available and your satisfaction is our
rst priority.
We hope you enjoy your JKS® purchase and are here to
help if you still have questions after reviewing this safety
information and instructions. Contact us online at www.
jksmfg.com or by phone at 877-533-7557.
Tools Required
Metric/Standard Socket Wrench Set
Torque Wrench
Tape Measure
Philips Screwdriver
Medium Strength Threadlocker
Hydraulic Floor Jack
Sturdy Block of Wood (to protect body)
Center Punch and Hammer
3/16” and 7/32” Drill Bits
1/4” NF Tap *
Reciprocating Saw or Die Grinder with Cut-Off Wheel *
(for trimming fan shroud)
Factory Service Manual (recommended)
* Asterisk denotes tools that are not required for some applica-
tions. Thoroughly read instructions rst to determine which tools
will be required for your application.
CAUTION
Parts
Description QTY
A
Dura-Thane™ Body Puck 11
B
1/2” x 4-1/2” Bolt 6
C
1/2” Flat Washer 6
D
7/16” x 4” Bolt 5
E
7/16” Flat Washer 5
F
Extended Radiator Bumper 2
NOTICE
One Side At A Time
Body lift must be installed on one side of vehicle at a time.
Motor Lift Recommended
Installation of JKS Motor Lift in conjunction with B1 Body
Lift is recommended. This will make steps 2, 6 and 7 unnecessary.
Always Wear Protective Gear
Safety glasses and protective gloves are required.
Install body lift rst if installing motor mount lift and body lift
at the same time.
JKS 9903JKS Body Lif t Installation
Page 1
Important Product
Safety Information
For your safety and the safety of others, please read
all instructions and warnings in this pamphlet and your
Jeep® owner’s manual and off road driving supplement
before attempting installation. Within these instructions
the following signal words refer to important product
safety information:
WARNING
Indicates hazards or unsafe situations which could
result in severe personal injury or death.
CAUTION
Indicates hazards or unsafe situations which could result in property damage or minor to moderate personal
injury.
To reduce risk of serious injury and accident:
 Choose modications that balance your actual
highway & off-road use.
 Avoid sharp turns, abrupt maneuvers or steep
side-cambers.
 Avoid other maneuvering conditions which may
cause the vehicle to trip, roll, lose traction or compromise your ability to safely brake in an emergency.
 Routinely inspect your vehicle components for un-
usual wear or off-road damage. Repair or Replace
any unserviceable components before use.
 Do not modify or combine body lifts with other me-
chanical lifts contrary to manufacturers’ or Jeep®
recommendations & warnings.
 Acquaint any other drivers with your vehicle modi-
cations and handling.
 Always wear seat belts and/or appropriate off-road
restraints, reduce your speed, Tread Lightly©.
NOTICE
Careful attention is required to this operation that generally does not relate to personal injury, although damage
to your JKS product or other property may result if you
fail to follow instructions.
WARNING
Higher Rollover Risk
Modifying your Jeep® to improve off-road performance
may result in vehicle handling different than as factory
equipped, including increased ride-height and/or chassis articulation; reduced lateral stability and higher risk of
roll-over or other accident. Also, owner’s choice of larger
tire and wheel combinations may require additional braking
force or increased stopping distances.
Installation
1. REMOVE CHASSIS COVER
Remove the mounting screws from the plastic
(JEEP embossed) crossmember cover in front of
vehicle grill.
Remove crossmember cover from chassis rails.
Remove steel strip in front of grill that holds the
steel brake line. Save the two plastic brake line
clips for re-installation, and discard steel strip.
2. UNBOLT FAN SHROUD
Remove the four bolts holding the plastic fan
shroud to the steel radiator bracket. Retain hardware for re-installation.
3. LOOSEN BODY MOUNTS
Locate all eleven body mount bolts on vehicle.
Refer to the BODY MOUNT LOCATION DIAGRAM
for assistance.
Loosen each body mount bolt, but DO NOT RE-
MOVE until instructed.
Remove the bolt from body mount
beneath the grill.
1 located
2 Page
Remove the bolts from body mounts 2 3 4 5
and 6 on DRIVER SIDE of vehicle only.
NOTE: Body mount 5 is located between fuel tank
and rear axle.
JKS 9903
JKS Body Lif t Installation
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