Sharp 27C540 Specifications

U.S. patent number
8,708,369
part number 4700 —
for all ROADMASTER tow bars with quick-disconnect release systems
Assembly and
Installation Instructions
Time Tested • Time Proven
ROADMASTER, Inc. • 6110 NE 127th Ave • Vancouver, WA 98682 • 800-669-9690 • Fax 360-735-9300 • www.roadmasterinc.com
© 2006-2014 ROADMASTER, Inc. All rights reserved.
85-3634-14 10-14
Description
IMPORTANT NOTICE!
The Tow Defender's all-weather, heavy-duty screen deflects rocks, gravel and road debris down and away, protecting your towed vehicle's finish, headlights and windshield against chips and dings. The vinyl-coated mesh lets
air through, keeping it low and over the road.
Fully extended, the Tow Defender measures 45" by 72"
(more than 20 square feet), and is held in place with shockabsorbing steel struts. Adjust the tension to fit your towing
system by simply sliding the collar up or down the tow bar
stinger or ball hitch mount.
Once you've reached your destination, roll up the Tow
Defender, snap the elastic straps around each end, and
store it against the motorhome.
The Tow Defender features powder-coated steel supports and heavy-duty gas struts for maximum durability,
support and cornering flexibility.
The model 4700 Tow Defender is designed for all ROADMASTER tow bars with quick-disconnect release systems.
Safety Definitions
These instructions contain information that is very important to know and understand. This information is provided for safety and to prevent equipment problems. To help
recognize this information, observe the following symbols:
Unpacking
After unpacking the Tow Defender, inspect carefully for
any damage that may have occurred during transit. Check
for loose, missing or damaged parts. Check to be sure all
supplied components are enclosed.
In case of questions, damaged or missing parts, please
call 800-669-9690 for customer assistance.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in property
damage, serious personal injury or even death.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in property damage,
or minor or moderate personal injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTE
Refers to important information and is placed in italic
type. It is recommended that you take special notice of
these items.
IMPORTANT
The Tow Defender is designed to reduce the damage to the vehicle while being towed. Although the
Tow Defender will significantly reduce the amount of
vehicle damage, the Tow Defender will not eliminate
all damage, under all circumstances.
Accordingly, ROADMASTER expressly disallows any
and all claims related to rock chips, dings, scratches
or any other damage incurred to the towed vehicle.
All illustrations and specifications contained herein are based on the latest
information available at the time of publication. ROADMASTER, Inc. reserves
the right to make changes, at any time, without notice, in material, specifications and models, or to discontinue models.
Read all instructions before installing
or using the Tow Defender. Failure to understand how to properly install or use
the Tow Defender could result in property
damage or personal injury.
Save these instructions
Save these instructions for future reference. they contain
important sections relative to safety, use, parts replacement and other information. Therefore, make sure this
manual is always with you when you’re towing. You may
download or print a copy of the most current instructions
at www.roadmasterinc.com (under ‘Support').
Made in the U.S.A.
1
CAUTION — A hitch extension may be required.
Some motorhome chassis have such a tight turning
radius that the Tow Defender may contact and cause
damage to the motorhome or towed vehicle during
sharp turns. For this reason, check the motorhome
turning radius before using the Tow Defender for the
first time — in an empty parking lot, attach the Tow
Defender, then have someone watch as you slowly
turn the motorhome sharply.
If the Tow Defender is too near the motorhome,
you must attach a hitch exten7½" hitch extension
(part number
sion to the motorhome hitch re071-75)
ceiver in order to use the Tow
Defender. This will extend the
distance between the motorhome
and the Tow Defender.
We recommend our 7½" extension (part number 071-75, pictured above) for this
purpose.
For StowMaster™ or StowMaster All Terrain™ applications only…
To ensure adequate clearance, the coupler on the
StowMaster or StowMaster All Terrain tow bar must
be mounted on a ball hitch extension with a drop of
at least two to four inches.
Otherwise, the coupler will wear through the Tow
Defender fabric if, while towing, any portion of the
fabric comes into direct contact with the coupler.
Do not install a ball hitch extension with a drop for
the sole purpose of gaining adequate clearance for the
Tow Defender.
The StowMaster tow bar must be approximately
level. If the tow bar is not level, it may be damaged
during towing, or it may detach from the ball mount.
Refer to the StowMaster owner’s manual for additional information.
Failure to follow these instructions may cause property damage, personal injury or even death.
CAUTION
The mesh fabric may be warped or otherwise damaged by the heat from exhausts at the rear of the motorhome. Do not attach the Tow Defender so that the
mesh fabric is in close proximity to the engine exhaust
pipe.
If the exhaust is located directly below the Tow Defender, install a ‘turn down’ extension (sold separately)
on the engine exhaust (according to the manufacturer’s
recommendations), to redirect the exhaust away from
the fabric. The Tow Defender fabric may be warped or
otherwise damaged if a turn down extension is not installed, or if other exhausts which cannot be redirected
(recessed exhausts, or exhausts from “hydronic” heating
systems) are in close proximity to the fabric.
Under what conditions
could heat from exhaust pipes
damage the Tow Defender fabric?
1. Heat from the engine exhaust could potentially damage
the fabric — the temperature at the engine exhaust pipe can
be over 1,000° Fahrenheit, under certain conditions.
Install a “turn down” extension, as instructed above, if the
engine exhaust pipe is directly below the Tow Defender.
2. Heat from a “hydronic” heating system exhaust will damage the fabric, if it is directed out the rear of the motorhome, in
close proximity to the fabric — the temperature at the exhaust
pipe may be between 500° and 600° Fahrenheit.
Many of these systems vent the exhaust at the side of
the motorhome. Side-vent exhaust will not damage the Tow
Defender fabric — only exhaust which is vented at the back
of the motorhome could potentially damage the fabric.
Some manufacturers stipulate that hydronic system
exhausts at the rear of the motorhome be directed straight
2
back (horizontal to the road). The exhaust cannot be directed
down, or a fire may result when the motorhome is parked in
dry, grassy areas, according to these manufacturers.
Redirecting the exhaust may void the manufacturer’s
warranty — several manufacturers stipulate a maximum of two
90° bends over the entire length of the exhaust pipe — more
than two 90° bends may cause back pressure to destroy
the exhaust pipe or force the exhaust back into the heating
system.
Redirecting the exhaust at any angle may be ineffective,
as far as avoiding damage to the Tow Defender fabric — the
exhaust would still be carried back and over (or under) the fabric.
3. Heat from the generator exhaust could potentially damage the fabric — the generator may run when the motorhome
is stationary, and the heat may not be dissipated as quickly
as it would be if the motorhome was moving.
Similarly, if the motorhome is stationary for an extended
period, with the engine idling, the Tow Defender fabric can
be damaged by heat from the engine exhaust.
4. Additionally, heat from recessed exhausts (for the furnace
and/or water heater) could conceivably cause damage, if they
were close enough to the fabric.
5. Heat from the exhaust of other systems, which ROADMASTER is presently unaware of, may also cause damage.
Assembly and connection instructions
1. Unfold the Tow Defender and unroll it, until the fabric
is completely flat.
2. Connect one of the gas struts to the collar — pivot the
end of one of the gas struts until the cap at the end of
the gas strut (Figure 1) is over the ball joint (Figure 1) on
that side. Press the cap down onto the ball joint, until it
snaps in place.
Repeat to connect the other gas strut.
3. Disconnect the tow bar from the hitch receiver and
slide the Tow Defender collar bracket (Figure 2) over the
tow bar stinger or ball hitch mount, so that the adjustment bolts (Figure 2) at the bottom of the collar bracket
are facing the hitch receiver. Hand-tighten the adjustment
bolts to hold the collar in place.
Slide the tow bar stinger or ball hitch mount into the
motorhome hitch receiver and reattach it.
4. Attach the collar (and the Tow Defender gas struts and
fabric with it) to the collar bracket, using the two 3/8" x
1" bolts and nuts, as shown in Figure 3. Attach the collar
at the ‘average’ setting.
5. Attach the tow bar to the towed vehicle. Also attach the
safety cables, electrical cord and any other components
which are connected between the two vehicles, according
to the manufacturers' instructions
6. For all motorhome-mounted tow bars — At both sides
of the quick-disconnect (QD) crossbar, remove the QD
linch pins (Figure 4) from the pins at the top of both QDs.
Then, position the QD adaptor brackets (Figure 4) over
the pins at the top of the QDs and replace and lock the
QD linch pins, as shown in Figure 4.
For StowMaster and StowMaster All Terrain tow
bars — the attachment method is the same as above, but
the linch pins attach through the holes at the end of the
QD adaptor brackets. Refer to Figure 6.
Note: to use the Guardian™ rock shield with the Tow
Defender — If the Guardian rock shield is to be used with
the Tow Defender, connect the Tow Defender first. Then
attach the Guardian, according to the instructions included
with the Guardian.
For motorhome-mounted tow bars — use the holes at
the end of the QD adaptor brackets to attach the Tow
Defender (identified as “attachment for Tow Defender with
Figure 1
Figure 2
Figure 3
continued on next page
Figure 4
Figure 5
3
continued from preceding page
Figure 6
Guardian” in Figure 5).
For StowMaster and StowMaster All Terrain tow bars
— always use the holes at the ends of the QD adaptor
brackets to attach the Tow Defender, regardless of whether
or not the Guardian rock shield will also be attached. See
Figure 6.
Make certain that the QD linch pins at both of the
adaptor brackets are properly attached. If the QD linch
pins are not locked
into position, with
the curved side of
the linch pins touching the rings, towing vibrations will
force the QD linch
pins out, which will cause the tow bar to separate from
the towed vehicle. If safety cables are not present,
the towed vehicle will separate from the motorhome,
which will cause property damage, personal injury or
even death.
7. Now, connect the car-side support bars to the other side of the Tow Defender — one of the support bars
has a pre-drilled hole near one end; the other has
a push-button lock. Slide both of the support bars
through the center of the Tow Defender and into the
pocket at the edge of the screen (Figure 7), so that
the hole and the push-button lock are at the center.
Then, depress the push-button lock and slide the bars together, until the lock snaps through the hole (Figure 7).
8. Unfold the Tow Defender until the support bars are over
both QD adaptor brackets (Figure 8). Rotate the support
bars, if necessary, so that the pre-drilled holes in the support bars align to the pre-drilled holes in the QD adaptor
brackets. Then fit the support bars into the slots in the
adaptor brackets, as shown in Figure 8. Next, insert the
two safety pins (Figure 8) through the pre-drilled holes in
the support bars and the QD adaptor brackets, and lock
them in place, as shown in Figure 8.
Note: the safety pins can only be attached with the
open end facing the towed vehicle, as shown in Figure
8.
CAUTION
If the safety pins are not locked in place as shown
in Figure 8, the Tow Defender will separate from the
towed vehicle, which may cause significant damage
to the towed vehicle or the Tow Defender.
9. Now that the Tow Defender is connected, make certain that the tow bar can be stored at the back of the
motorhome — without removing the support tubes, roll
the screen toward the motorhome, and secure the Tow
Defender with the Velcro storage straps (Figure 9) around
each side of the Tow Defender. Then disconnect the tow
bar and fold it against the side of the motorhome.
If the Tow Defender interferes with the storage of
4
Figure 7
Figure 8
the tow bar, adjust the collar and/or the collar bracket to
gain clearance.
10. Now that you have verified that the tow bar can fold
up for storage, it may be necessary to adjust the Tow
Defender to your towing system. The fabric must be taut
enough to deflect road debris away from your towed vehicle. However, if it is stretched too tight, the fabric will
fail and tear at the seams over time.
If necessary, refer to the table on page five to adjust
the fabric.
11. IMPORTANT! The last adjustment you make must
be as follows: slide the Tow Defender collar bracket (Figure
2) up or down the tow bar stinger (or hitch ball extencontinued on next page
continued from previous page
sion), so that the Tow Defender screen appears taut. Now
slide the collar bracket back one inch toward the towed
vehicle. This slack is necessary for sharp turns. If the
fabric is too taut, over time the fabric will fail and tear at
the seams.
Figure 9
CAUTION
Failure to leave enough slack in the screen will
cause the fabric to tear and is not covered by warranty.
12. With the collar in the correct position, tighten the two
set bolts at the bottom of the collar (Figure 9) with a 9/16"
wrench, until the collar is fixed in place.
13. When not in use, the Tow Defender may be stored
at the rear of the motorhome — remove the QD adaptor
safety pins and both of the QD adaptor brackets, roll the
screen toward the motorhome, and loop and attach one
of the two storage straps around each side of the Tow
Defender (Figure 9).
Figure 10
CAUTION
Remove both of the QD adaptor brackets when the
Tow Defender is not in use. If the Tow Defender is
not attached to them, the brackets may rotate out of
position and damage the towed vehicle’s finish.
CAUTION
Adjustments to the Tow Defender fabric
When the motorhome is stationary with the engine
idling, the Tow Defender fabric can be warped or otherwise damaged by the heat from exhaust systems at
the rear of the motorhome. Do not idle the motorhome
engine for an extended period when the Tow Defender
is attached to the motorhome, or non-warranty damage
to the fabric may occur.
If the fabric is too tight…
•Move the collar bracket toward the towed vehicle,
or…
• Move the support tubes to the outer sleeve
(Figure 10).
Do not lift or carry the Tow Defender by the safety
pins. The pins will separate and the Tow Defender will
fall, which may cause property damage or personal
injury.
The Tow Defender fabric may conceal the towing
system attachment points, as well as the attachment
points for other components underneath it. Before
towing, make certain that the tow bar, safety cables,
electrical cord and any other components which are
underneath the Tow Defender are securely attached,
according to the manufacturers’ instructions.
If a component of the towing system, or any other
component underneath the Tow Defender, has detached and is not reattached, the towing system or
other components may fail, which may cause property
damage, personal injury or even death.
If the fabric is too loose…
•Move the collar bracket toward the motorhome,
or…
•
Move the support tubes to the inner sleeve
(Figure 10), or…
•
Bolt the collar on the other side of the collar
mounting bracket, or…
If the motorhome exhaust pipe
is too close to the fabric…
• Bolt the collar to a different height setting (Figure
3), or…
•
Move the collar bracket toward the towed
vehicle.
CAUTION
If the fabric cannot be adjusted away from
the exhaust pipe, do not use the Tow Defender
— non-warranty damage to the fabric will occur.
5
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