Raider V6-3.7L SOHC (2006)
Wiper Arm: Description and Operation
WIPER ARM
DESCRIPTION
The wiper arms are the rigid members located between the wiper pivots protruding from the cowl plenum cover/grille panel near the base of the
windshield and the wiper blades on the windshield glass. Both wiper arms feature an over-center hinge (6) that allows easy access to the windshield glass
for cleaning. The wiper arms each have 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 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
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.
The right and left wiper arms are unique and are not interchangeable. A wiper arm cannot be adjusted or repaired. If damaged or faulty, the entire wiper
arm unit must be replaced.
OPERATION
The 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.
