Jeep Liberty KJ. Manual — part 316
WIPER ARM
DESCRIPTION
FRONT
The front wiper arms are the rigid members located
between the wiper pivots that protrude from the cowl
plenum cover/grille panel near the base of the wind-
shield and the wiper blades on the windshield glass.
These wiper arms feature an over-center hinge that
allows easy access to the windshield glass for clean-
ing. The wiper arm has a die cast metal pivot end (4)
with a large tapered mounting hole (5) at one end. A
molded black plastic cap fits over the wiper arm
retaining nut to conceal the nut and this mounting hole
following wiper arm installation.
The wide end of a tapered, stamped steel channel (3) hinges on and is secured with a hinge pin (6) to the blade
end of the wiper arm pivot end. One end of a long, rigid, stamped steel strap (2) with a small hole near its pivot end
is riveted and crimped within the narrow end of the stamped steel channel. The tip of the wiper blade end of this
strap is bent back under itself to form a small hook (1). Concealed within the stamped steel channel, one end of a
long tension spring (7) is engaged with a wire hook on the underside of the die cast pivot end, while the other end
of the spring is hooked through the small hole in the steel strap. The entire wiper arm has a satin black finish
applied to all of its visible surfaces.
A wiper arm cannot be adjusted or repaired. If damaged or inoperative, the entire wiper arm unit must be replaced.
REAR
The rear wiper arm is the rigid member located
between the rear wiper motor output shaft that pro-
trudes from the outer tailgate panel near the base of
the rear flip-up glass opening and the rear wiper
blade. This wiper arm features an over-center hinge
that allows easy access to the tailgate and rear flip-up
glass for cleaning, after the spare tire is removed. The
wiper arm has a die cast metal pivot end (6) with a
large tapered mounting hole at one end. A molded
plastic pivot cover (5) is secured loosely to and pivots
on the wiper arm hinge pin (4) to conceal the wiper
arm retaining nut.
The wide end of a tapered, stamped steel channel (3) is secured with a hinge pin to the pivot end of the wiper arm.
One end of a long, rigid, stamped steel strap (2) with a small hole near its pivot end is riveted and crimped within
the narrow end of the stamped steel channel. The tip of the wiper blade end of this strap is bent back under itself
to form a small hook (1). Concealed within the stamped steel channel, one end of a long tension spring (7) is
engaged with a wire hook on the underside of the die cast pivot end, while the other end of the spring is hooked
through the small hole in the steel strap. A molded plastic wiper arm support (8) is snapped onto the wiper arm
strap where it exits the channel. The entire wiper arm has a satin black finish applied to all of its visible surfaces.
A wiper arm cannot be adjusted or repaired. If damaged or inoperative, the entire wiper arm unit must be replaced.
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WIPERS/WASHERS - SERVICE INFORMATION
KJ
OPERATION
FRONT
The front wiper arms are designed to mechanically transmit the motion from the wiper pivots to the wiper blades.
The wiper arm must be properly indexed to the wiper pivot in order to maintain the proper wiper blade travel on the
glass. The tapered mounting hole in the wiper arm pivot end interlocks with the serrations on the tapered outer
circumference of the wiper pivot shaft, allowing positive engagement and finite adjustment of this connection. The
mounting nut locks the wiper arm to the threaded stud of the wiper pivot shaft. The spring-loaded wiper arm hinge
controls the down-force applied through the tip of the wiper arm to the wiper blade on the glass. The hook formation
on the tip of the wiper arm provides a cradle for securing and latching the wiper blade pivot block to the wiper arm.
REAR
The rear wiper arm is designed to mechanically transmit the motion from the rear wiper motor output shaft to the
rear wiper blade. The wiper arm must be properly indexed to the motor output shaft in order to maintain the proper
wiper blade travel on the glass. The wiper arm support is designed to lift and support the rear wiper arm and blade
off of the glass when the rear wiper blade is parked. This support and the park ramp on the tailgate outer panel
below the glass also provide an alignment reference to ensure accurate rear wiper arm and blade installation.
The tapered hole in the wiper arm pivot end interlocks with the serrations on the outer circumference of the tapered
motor output shaft, allowing positive engagement and finite adjustment of this connection. A hex nut secures the
wiper arm pivot end to the threads on the rear wiper motor output shaft and the pivot cover hinges and snaps over
this connection for a neat appearance. The spring-loaded wiper arm hinge controls the down-force applied through
the tip of the wiper arm to the wiper blade on the glass. The hook formation on the tip of the wiper arm provides a
cradle for securing and latching the wiper blade pivot block to the wiper arm.
REMOVAL
FRONT
1. Lift the front wiper arm (1) to its over-center posi-
tion to hold the wiper blade off of the glass and
relieve the spring tension on the wiper arm to wiper
pivot shaft connection.
2. Carefully pry the plastic nut cap (2) off of the pivot
end of the wiper arm.
3. Remove the nut (3) that secures the wiper arm to
the wiper pivot shaft (4).
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4. If necessary, use a suitable battery terminal puller
(3) to disengage the wiper arm (1) from the wiper
pivot shaft (2).
5. Remove the front wiper arm pivot end from the
wiper pivot shaft.
REAR
1. Lift the rear wiper arm pivot cover (6) by lifting it at
the rear wiper motor output shaft end of the arm
(5).
2. Remove the nut that secures the rear wiper arm to
the rear wiper motor output shaft.
3. If necessary, use a battery terminal puller (3) to dis-
engage the wiper arm (1) from the rear wiper motor
output shaft splines (2).
NOTE: Depending upon the size and type of puller
used, it may be necessary to remove the spare tire
from the tailgate. Refer to the owner’s manual in
the vehicle glove box for information on removing
the spare tire from the tailgate.
4. Remove the rear wiper arm pivot end from the
motor output shaft.
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INSTALLATION
FRONT
NOTE: Be certain that the wiper motor is in the park position before attempting to install the front wiper
arms. Turn the ignition switch to the On position and move the control knob on the right (wiper) control
stalk of the multi-function switch to its Off position. If the wiper pivots move, wait until they stop moving,
then turn the ignition switch back to the Off position. The wiper motor is now in its park position.
1. The front wiper arms must be indexed to the wiper
pivot shafts with the wiper motor in the park posi-
tion to be properly installed. Position the front wiper
arm pivot ends onto the wiper pivot shafts (4) so
that the tip of the wiper blade (1) is aligned with the
T-shaped wiper alignment lines (5) located in the
lower edge of the windshield glass.
2. Once the wiper blade is aligned, lift the wiper arm
away from the windshield slightly to relieve the
spring tension on the pivot end and push the pivot
hole on the end of the wiper arm down firmly and
evenly over the wiper pivot shaft.
3. Install and tighten the nut (3) that secures the
wiper arm to the wiper pivot shaft. Tighten the nut
to 24 N·m (18 ft. lbs.).
4. Wet the windshield glass, then operate the front
wipers. Turn the front wipers Off, then check for the correct wiper arm position and readjust as required.
5. Reinstall the plastic nut cap (2) onto the wiper arm pivot nut.
REAR
NOTE: Always install the wiper arm and blade with the wiper motor in the Park position.
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WIPERS/WASHERS - SERVICE INFORMATION
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