WARN® INDUSTRIES
PAGE 11
72171 Rev A0
IV. B. Plow support installation
15. If not already done so, assemble the plow base
and blade per the instructions found with the plow
blade.
16. Take the plow arms, and generously grease the
inside of the bushing on both ends. Tap one end
of the arm over the bearing rods of the plow base.
See Figure 21. It is normal for powdercoating to
be removed during the process. Rotate the arm
back and forth until it moves freely around the
bearing rod. Add more grease if necessary.
17. Using a hammer, tap a 1” outer dia x 1-5/8” long
spacer into one end for each of the arms. See
Figure 21.
18. On the outer flanges of the plow support, you’ll
notice three sets of holes on each flange. There
is a top set of three holes, a bottom set of three
holes, and a bottom set of two holes. The
support has several sets of holes to account for
various vehicle heights determined by tire size/
pressure, weight, and shock settings. If the top
arm is attached to position #1, then the bottom
arm and arm stop must also be in position #1.
The same goes for positions #2 and #3. You’ll
notice that there is no position #3 for the arm
stop. An arm stop is not needed if this position is
selected. There is no way to predetermine which
setting the arms should be set in as each vehicle
will react differently with a plow installed, thus the
user must use trial and error. It is recommended
to start in position #1 as this will fit the majority of
vehicles. For vehicles with greater than normal
ground clearance, the arms and stops may have
to be moved to position #2 or #3. A more detailed
explanation for finding the right arm position is
described later in this document.
Figure 21 Install plow arms onto plow base
Plow base
4x plow arm
(blade not shown)
Grease
inside arm
bushing
Bearing rods
4x 1x1-5/8
spacer
Figure 22 Arm and stop positioning
Top arm position #1
Top arm position #2
Top arm position #3
Bottom arm position #1
Bottom arm position #2
Bottom arm position #3
Arm stop position #1
Arm stop position #2
WARNING
Do NOT mix and match position settings for the
arms and arm stops. Doing so will cause the
plow to act erratically and possibly damage the
plow during operation. Additionally, failure to
place the arm stops in the proper position, or
failure to use them when instructed to, can
cause the plow to eject vehicle occupants when
hitting a stationary object leading to severe
injury or even death.