VEVOR 5807 User manual

Technical Support and E-Warranty Certificate
www.vevor.com/support
TRAILER GATE LIFT ASSIST
We continue to be committed to provide you tools with competitive price.
"Save Half", "Half Price" or any other similar expressions used by us only represents an
estimate of savings you might benefit from buying certain tools with us compared to the
major top brands and doses not necessarily mean to cover all categories of tools offered by
us. You are kindly reminded to verify carefully when you are placing an order with us if you
are actually saving half in comparison with the top major brands.

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Structure Diagram
5807
5806
Have product questions? Need technical support? Please feel free to
contact us:
CustomerSe[email protected]
NEED HELP? CONTACT US!
This is the original instruction, please read all manual instructions
carefully before operating. VEVOR reserves a clear interpretation of our
user manual. The appearance of the product shall be subject to the
product you received. Please forgive us that we won't inform you again if
there are any technology or software updates on our product.
TRAILER GATE LIFT
ASSIST

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INSTRUCTIONS
Thank you very much for choosing this trailer gate lift assist. Please read
all of the instructions before using it. The information will help you achieve
the best possible results.
Warning-To reduce the risk of injury, the user must read the
instructions manual carefully.
Model and Parameters
Caution:
Always ensure that the tailgate is secured and locked in an upright
position. This product is not intended to replace this important safety
measure. Please note that this product does not make the tailgate weight-
bearing, and it is essential that the opened tailgate always rests on firm
ground. Never attempt to raise or lower the tailgate while anyone or
anything is underneath it. Additionally, it is crucial to keep your hands
away from all openings, rollers, or cables when using this product to avoid
injury.
CAUTION
As there are many different sizes, weights, and designs of trailers and
tailgates available in the market, some minor adjustments may be
necessary to ensure that the Lift is functioning correctly. It is crucial to
Model
5807
5806
Weight of maximum tailgate
or ramp
360 pounds
180 pounds
Height of tailgate or ramp
4 ft to 6 ft
4 ft to 6 ft
The height of the side rails
above the trailer bed
10 to 24 inches
10 to 24 inches
Length
72 inches
72 inches
Installation site
Bilateral
Unilateral

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exercise extreme caution during and after the initial installation of the Lift
to ensure that it is working properly. Before installing, adjusting, or working
on the Lift, always secure and lock your tailgate in the upright position.
Check to ensure that there is not too much or too little lifting power on your
tailgate. Never apply excessive force to raise or lower the tailgate; it
should move with minimal effort in both directions. Always ensure that the
rollers are turning freely and that the cable is in good condition and travels
in the grooved portion of the rollers as it operates.
Tools required when assembly
COMPONENTS
Measuring Tape
1/2-inch Metal Drill Bit
Marker and Punch
2 Adjustable
Wrenches
Heavy Duty Power
Drill
Needle Nose Pliers

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①2PCS× housing A
②2PCS× housing B
③2PCS× spring/cable assembly
④8PCS× 5/16 inches × 3 inches mounting Bolts (M8 × 75 mm)
⑤8PCS× 5/16-inch flat washer (M8)
⑥8PCS× 5/16-inch flanged lock nut
⑦2PCS× pin A
⑧2PCS× locking ring A
⑨4PCS× roller
⑩4PCS× pin B
⑪8PCS× 1/4-inch flat washer (M6)
⑫4PCS× locking Ring B
⑬2PCS× S hook (purpose for determination of the Bolts ⑭position)
⑭2PCS× 1/2 inch × 5 1/2 inches gate attachment bolt Bolts（M12 ×
140mm）
⑮4PCS× 1/2-inch flanged lock nut (M12)
⑯8PCS× 1/2-inch flat washer (M12)

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Important Note:
If the top of your trailer's side rail is made of round tubing larger than 2
inches in diameter, you will need longer mounting bolts before beginning
the installation process. Alternatively, you can spot-weld the Lift on the
side rails instead of using mounting bolts. When mounting the Lift, ensure
that your housings are straight, level, and flush to ensure proper
installation.
Assembly and Use
STEP 1. INSTALLING THE HOUSING A AND THE HOUSING B
1) Mark the hole positions of bolts before installing bolts.
Place and align housing A & housing B on top of the trailer's side rail.
Notice the direction of the housing in Figure 1-0.

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FIG. 1-0
That the housings are straight and level on the rail and flush against each
other; Mark the center of housing B's mounting holes, as FIG1-1 and
FIG1-2. In most cases, L1≈1/4 inch as FIG1-3.
FIG. 1-1
FIG. 1-2

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FIG. 1-3
Remove housing B from the side rail without disturbing the placement of
housing A. Mark the center of housing A's mounting holes, as shown in
FIG1-4 and FIG1-5
FIG. 1-4
FIG. 1-5

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2) Mark the center of housing A&B's mounting holes. Drill 1/2-inch holes
(which are oversized) down through the side rail where you made your
marks.
WARNING！L1≈1/4 inch,If you must install L1 greater than 1/4 inch,
you must make sure that cables cannot rub against the end of side rails
when lowering the tailgate all the way down to the ground. (0＜L2), Avoid
fray and eventually break.
FIG. 1-6
3)Install housing A and B.

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To install, insert the bolts through the mounting holes located at the ends
of housings A and B, where they come together. Then, place the housings
back on the rail while guiding the bolts through the appropriate 1/2-inch
holes that you have drilled into the side rail. It is crucial to ensure that the
mounting bolts are seated all the way down into their square holes and
remain seated when connecting and tightening to the side rail. The
oversized 1/2-inch holes that you drilled will allow you to do this. Failure to
follow this step may cause the springs to catch on the bolts, preventing the
tailgate from going all the way to the ground and causing damage to the
springs.
4) Make sure that housings A & B are straight, even, and tight against
each other.
STEP 2. INSTALLING THE SPRING/CABLE ASSEMBLIES:
.
FIG.2-0
1) Slide a spring/cable assembly into housings A & B. The pin A ⑦
passes through the springs loop (two springs loop) and housings A, as

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shown in FIG.2-1 and FIG.2-2. Be sure you run the pin through the looped
ends of both the inner and outer springs.
FIG. 2-1
FIG. 2-2
1) Install locking ring A ⑧as FIG. 2-3.
#1 The locking ring through the hole of the pin and then a gentle
rocking motion from Step 1 to Step 2 of as FIG. 2-4.
FIG. 2-3

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FIG. 2-4
STEP 3. INSTALLING THE ROLLERS
1)Install the roller as FIG. 3-1 and FIG. 3-2.
FIG. 3-1

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FIG. 3-2 FIG. 3-3
Make sure the roller is spinning freely and smoothly. If not, please
check it carefully if any bends in the tube, burrs, or rough spots.
STEP 4 .Repeat the other above steps and assembly the other side
of the Trailer Gate Lift Assist.
STEP 5. ATTACHING THE CABLES TO THE TRAILER'S TAILGATE
IMPORTANT: When the cable was attached to the tailgate, if your
tailgate won’t go down, NEVER FORCE ！Don't use violence at the
tailgate in either direction !

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1)First, the tailgate is placed on the ground, and measure the approximate
position of the hook on the tailgate. In most cases, L is between 20 inches
and 35 inches.
Warning! The greater the L, the greater the force.
The spring or cables will probably be broken when
L>37 inches.
2) Secure and lock your tailgate in the upright position.
3) Attach an S-Hook to the looped end of each cable.
Raise cables just enough to take the slack out of each
and (using the S-Hooks) attach each of them to the
mesh on both sides of the tailgate, doing so as close
to the outer side support angles/tube as possible. As
Fig 5-1. (S-Hooks are for installation purposes only,
NOT for permanent use!)
4)To ensure the proper functioning of the Lift, slowly lower the tailgate
halfway down to the ground to check if the springs are moving freely. The
tailgate should balance out in this position and move up and down with
minimal effort. If this is not the case, return the tailgate to the upright
position, secure it there, and make adjustments A or B.
A. If there is not enough lifting power on the tailgate, raise the attachment
points using the S-Hooks on both sides of the tailgate while keeping both
attachment points at the same height. This will help balance the tailgate at
Fig 5-1

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almost any position and allow it to move up and down with minimal effort.
B. If there is too much lifting power on the
tailgate, and it will not go completely down
or stay completely down, please refer to
TROUBLESHOOTING #2. This involves
using a marker or puncher to make a mark
on the tailgate side support tube/angle at
the same height as the opening in the
cable loop, as shown in X of Fig 5-2.
5) Drill a through 1/2-inch hole at X.
6) Slide the cable thimble onto the gate attachment bolt . as FIG. 5-3.
Note: The cable is as straight as possible when pulling, then tighten the
nuts.
FIG. 5-3
7) Repeat the two steps above on the other side.
Troubleshooting Instruction:
1) If a roller is not spinning freely:
Check the housing and cable are straight. Check the housing for
deformation.
2) If there is too much lifting power on your tailgate.
A. Use S-Hooks to test different cable attachment positions and lifting
power and adjust the value of L.
FIG. 5-2

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B. Reduce the small inner springs in the spring/cable assembly. Using
only large outer springs, reattach both cables to the tailgate. IMPORTANT:
Never only hook up small inner springs by themselves.
Maintenance
1) Check the cable for breakage, and replace the spring/cable assemblies
if breakage.
2) Ensure all bolts and hardware are tight, secure, and sound.
3) Dust out the cable and roller regularly.
Sanven Technology Ltd.
Address: Suite 250, 9166 Anaheim Place, Rancho Cucamonga, CA
91730
MADE IN CHINA

Technical Support and E-Warranty Certificate
www.vevor.com/support