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Multi-Mount® U
®
Truck frame
3" Min. S.A.E.
recommended
clearance
2"x4" spacer
block for desired
clearance
around tires
ISOBLOX
Drill 5/8" clearance
hole or use existing
hole in frame.
7/16 Lock
Washer
Minimum
1/2"
DISTANCE
MINUS 2"
EQUALS
OFFSET
TIRE
FENDER
SPACER
ISO-BLOX
LOCATION
STRAIGHT EDGE
FRAME
FRAME HOLE
FRAME SIDE
Distance = Inches
from Fender to Hole
in Frame Minus 2"
Adjust Frame Side To
Proper Measurement
FENDER
SIDE
A
Assembly Instructions
PATENT #7,073,804
Installation Sheet
# INS-02024
NOTE: These instructions for installation are intended to be a
general guide to help the installer. Because of the large number of
possible mounting configurations, the installer is responsible for
the ultimate installation design. Any modifications to the product
are at the discretion, responsibility and risk of the installer.
1. Position fender over
tires. Use 2x4 block or
other suitable spacer
to achieve desired
clearance around
tires.
2. Determine the approximate placement
of the X-FLEX
®
BLOX
on the fender.
Select an existing hole
in the truck frame or
drill a clearance hole
for a 5/8” dia. bolt
within the range of the
mount, 2”-10”. (Range equals adjustment +2)
Note: Be sure to follow truck manufactures recommend-
ed procedures for drilling any required hole in the frame.
The desired position for the X-FLEX
one installation to another. This is best determined with
the help of the instructions from the fender manufacturer.
If mounting instructions from the fender manufacturer
are unavailable, the X-FLEX
approximately 5”-6” in from the sides and centered on
the fender. When using X-FLEX
mount on a half tandem, locate no more than 18”
in from the end of the fender.
®
ISO-
The adjustable, versatile X-FLEX®
Multi-Mount® U is designed for
mounting under the fender using the
X-FLEX® ISO-BLOX® vibration isolation system.
®
mounts will vary from
®
mounts should be located
®
ISO-BLOX® with an end
3. Place a straight edge on the
fender at the ISO-BLOX
®
location and extend it to meet
the truck frame. Measure the
distance from the straight
edge (fender) to the center
of the hole in the frame. Now
subtract 2” from that number.
This is the amount of offset that
the X-FLEX Multi-Mount
®
U should
be set at (Step 4). NOTE: If the offset is 4”-8”, the frame side of
the mount will be in the “A” position. If the offset is 0”-4” it will be
in the “B” position. ( See illustration below)
4. Loosely assemble the fender side and the frame side of the MultiMount
®
with the 5/8”x1-3/4” bolt, heavy duty flat washer and
2” square nut. Now insert the mounting tube through the clamp
on the fender side of the
Multi-Mount
®
, far enough
to measure from the center
of the tube to the center of
the bolt hole in the frame
side of the mount. Adjust
the frame side of the mount
so that the distance from the
center of the tube to the center of
the bolt hole in the frame side equals
the measurement from the previous step
(distance from the fender to the center of
hole in the frame minus 2”). Now tighten the 5/8” bolt
5. Re-adjust the position of the mounting
tube until a minimum of 1/2” of the tube
is showing through the clamp, then
tighten the 7/16” clamp bolt. NOTE:
The position of the tube may be
adjusted for different installations,
but the tube must always be fully
through the clamp.
6. Fasten the Multi-Mount
the appropriate hardware. Rotate the mount into position and insert the ISO-BLOX
the fender. Make sure the fender, the ISO-BLOX
are all in the desired location, then tighten the frame mounting
bolt. Note: ISO-BLOX
®
loosely to the frame with
®
between the tube and
®
may have to be slightly repositioned
®
and the mount
to acheive proper fender height.
®
7. Continue using the instructions from the ISO-BLOX
system.
8. When all the mounts are installed and the fender is in the desired
location, remove the spacer blocks and tighten all screws and
bolts to proper torque:
5/8” bolts torque to 245 ft. lbs. • 7/16” bolts torque to 55 ft. lbs.
9. Install end caps as per instructions.
Each X-FLEX® Multi-Mount® U
System Includes:
2 Multi-Mount® e-coat
Fender Side Castings
2 Multi-Mount
Frame Side Castings
2 2” sq. X-FLEX
2 Mounting Tubes
4 End Caps
2 7/16”-14 x 1-1/4 Bolts
2 7/16” Lock Washer
2 5/8”-11 x 3-1/2” Bolts
2 5/8” x 1-3/4 Bolts
4 5/8” Heavy Duty Flat Washers
2 5/8”-11 Nuts
2 5/8” Lock Washers
™
e-coat
™
Nuts
X-FLEX
FENDER
END CAP
MOUNTING
TUBE
Installation Sheet Part Number INS-02024 • 2/02 • Rev. A-8/02 • Rev. B-10/06 • Rev. C-12/10 • Rev. D 5/13
ISO-BLOX
X-FLEX
ISO-BLOX
CLAMPLING
PLATE
7/16 Lock
Washer
2" Sq. X-FLEX NUT
FENDER
SIDE
CASTING
5/8-11 x 3-1/2
7/16-14 x 1-1/4
END CAP
Nordlock Washer
FRAME SIDE
CASTING
5/8" Heavy-Duty
Nordlock
5/8 x 1-3/4
Was
her
FRAME SIDE
CASTING
OFFSET
ADJUSTMENT
2"- 10"
5/8" -11
Nut
Nordlock
Washer
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