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Spray Master® Half Tandem
& Double Radius Fender
Installation Instructions
1. Position the fender upside down, making sure
to protect the top side
from getting stratched,
etc. Take two center connector clamps and, with
the square holes facing
outward, slide over the
fender center cap. Align
with the holes in the fender
and secure with 2” bolts
and lock nuts. Torque
to 16 ft. lbs.
Center Cap
Installation Sheet #INS-07034
Patent Pending
NOTE: These instructions for installing Spray Master fenders 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 installation design and for providing
adequate clearance around
the tire carrier (i.e. tire clearance, trailer clearance, etc.)
This product may not fit all
truck models or types of
suspensions. Check truck
or trailer manufacturer for
suspension travel specifications. Modifications to the brackets and/or
the fenders may be required. Any modifications are at the discretion,
responsibility and risk of the installer and may void warranty.
The figures below show the general locations of mounts on half
tandem and double radius tandem fenders (E = end mount / C =
center mount).
E
C
E
E
Double Radius
Tandem Fender
Tandem Fender
Note: The Spray Master® half tandem fender is not universal;
there is a left hand fender (roadside) and right hand fender (curbside). The “hidden pocket” opening is always positioned towards
the vehicle frame.
C
Half
1A. For Double Radius Fender
Only (if mounting half
Connector
Clamps
tandem, go to step two).
To make a Spray
Master Double
Radius Fender,
two Half Tandem
fenders sets are
Hidden
Pocket
required. Take both
a roadside and a curbide
tandem fender and position
them upside down, making sure
to protect the top side from get-
ting stratched, etc. Both hidden
pockets must face the same way
- if not, you have either two roadside or two curbside fenders. Align
the holes of the center caps of each
Hidden
Pocket
fender together and slide the two
center connector clamps into position over the two sets of
holes on the fender center cap surface. Secure the connector clamps with 2” bolts and lock nuts.
Torque to 16 ft. lbs.
2. Slide a hidden mount tube
with the threaded insert end
first, through the hidden
pocket opening
over to the center
rib support.
Attach to the
Hidden
Pocket
Bolt &
Washer
Center Rib
Support
center rib support with a 1.5”
bolt and washer but do not
engage thread locking compound
yet, just start bolt up for positioning
purposes.
2A. If installing a double radius fender, do
step two to both fenders.
3. Insert two T-nuts into each hidden end mount clamp from
inside clamp tube hole. Hold T-nuts in place while sliding over
the mounting tube. Do not slide hidden end mount clamp over
ribs on fender.
3A. If installing a double radius fender, do step three to both
fenders.
Left hand (roadside) shown
Installation Sheet # INS-07034 • Rev. B 2/13
T-Nut
Clamp
Tube Hole
T-Nut
Fender Ribs
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Spacer
Blocks
Spray
Master
Spacer
Blocks
Truck
Frame
3" Minimum
3" Minimum
4. Insert a T-nut into
each of the two
center mount connector clamps from
inside the tube hole.
Select either a bent
tube or the Master
Multi-Mount straight
tube for the center mount. (NOTE:
the bent tube uses
either a 1.37 or a 1.87” tube opening connector clamp while
the Master Multi-Mount center mount uses a 1.37” tube opening connector clamp). Take the mounting tube selected and
slide through
both connectors
while holding
the T-nuts in
the connector
clamp in place. If
using the MultiMount, assemble
castings to the
straight tube
using installation
sheet INS-03029
for position
purpose only.
5. Flip fender back over and position over tires. If installing a
Double Radius Fender, watch for “pinched” nger at center
connection. Use 2 x 4 blocks or other suitable spacers to
achieve desired clearance around tires. (S.A.E. recommendation is 3” minimum).
Note: If you have an air suspension, make sure there is tire
clearance when the suspension is deflated.
T-nut
7. Adjust the center mount tube to select an existing hole if available, or mark a space on the frame to drill an new hole.
Note: Be sure to follow truck or trailer manufactureres recom-
mended procedures for drilling any required holes in the frame.
Mark position
on frame
8. Remove fender from over tires and drill hole(s) if necessary.
Engage hidden mount teeth of clamp onto the hidden pocket
teeth of the fender and push firmly until they seat over top and
bottom ribs. A tap or two with a soft faced hammer may be
needed. Torque bolt at center rib support to 38 ft. lbs.
Note: If clamp removal or reposition is necessary, an outward
tap with a soft faced hammer will disengage it from the ribs.
9. Mount tube casting sleeve to the truck frame at the end mount
location. See installation sheet INS-03028.
6. On the frame side of the fender, position the hidden END
mount clamp (with tube) as necessary to select an existing hole
or mark a space on the frame to drill a new hole. Make sure the
tube is square to the frame and mark the position of the hidden
end mount clamp on the fender.
6A. If installing a double radius fender, do step six to both ends of
fenders.
Mark position
10. Position the fender back on the vehicle and connect the END
and CENTER mounts to the vehicle. Check to make sure the
fender is centered over the tires. (In a few cases it may be
necessary to shorten the hidden mount end tube. If this is the
case, be sure to cut the non threaded insert end only!) Tighten
all bolts to proper torque. Install the set screws in both the
center connector clamps and hidden end mount clamps and
tighten to a maximum torque of 48 in. lbs. +/_ 3in. lbs. or 4
ft. lbs. Install end caps on center mount tube per installation
sheet INS-20014. Peal plastic off fender reflectors.
Please Note:
Flap weights are not recommended and may
void the warranty.
Painting Spray Master fenders IS NOT recommended
and may void the warranty. If painting is desired,
use Valspar Plastic Enamel for best results.
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