Installation Guide. Installation Guide. Exploded Views Installation Instructions Mounting System Parts List. USTarp.

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1 Installation Guide Installation Guide Exploded Views Installation Instructions Mounting System Parts List USTarp.com

2 Fits dump trailers up to 40 long, or up to 45 long with Bulletproof HD system Premium polished aluminum arms, for great looks and no rust. Featuring telescoping arms so one system fits a wide range of body lengths. Versatile bolt or weld on spring assemblies that can be mounted under or through the bottom rail of the body. Stainless steel hardware is available upon request. Comes standard with 5/8 15 coil spring Tools Required 3/8 Drive Ratchet Electric Drill 1/4 Socket & Wrench Radial Arm Saw 5/16 Socket & Wrench (2) Tape Measures 3/8 Socket & Wrench Rubber Mallet 1/2 Socket & Wrench All Measurements are SAE US Tarp s Newest addition to the Universal Motor Collection is the 90:1 Heavy Duty Universal Motor with Back Plate and Chrome Cover. 2.5 HP Electric Tarp Motor coupled with a 90:1 Gear Ratio makes this motor powerful enough for any type and length of tarp being used on a standard Dump Truck or Trailer. Part Number #15133 Hardware Kit Includes QTY. Part Number # Description /2-13 x 1 Grade 5 Hex Cap Screw /2-13 x 3/4 Low Carbon Hex Bolt /2-13 Nylock Nut /8-16 x 1 Grade 5 Hex Bolt /8 Flat Washer /8 Nylock Nut /16-18 x 2-1/4 Grade 5 Hex Bolt /16-18 x 1-3/4 Grade 5 Hex Bolt /16-18 x 1-1/4 Low Carbon Hex Bolt Fully Threaded /4-20 x 3/4 Zinc Plated Carriage Bolt /4 x 1 Zinc Plated Fender Washer /16 Nylock Nut /4 Nylock Nut /4-20 x 2-1/2 Grade 5 Hex Bolt /4 Nylock Nut /2 Plastic Tarp Axle Cap System Includes QTY. Part Number # Description Ref. # Underbody Spring Assembly Passenger Side Underbody Spring Assembly Driver Side Underbody Aluminum Arm Casting Underbody Aluminum Lower Arm Underbody Aluminum Lower Arm Underbody Aluminum Lower Arm Underbody Aluminum Lower Arm Underbody Lower Arm Hardware Kit N/A Aluminum Cross Tube, 105-1/ Aluminum Upper Side Arm Aluminum Upper Side Arm Aluminum 90 Degree Corner Plastic Tarp Flange Aluminum Upper Arm Hardware Kit N/A /2 Rubber Tarp Centering Flange Optional Alum. 45 Degree Elbow Optional Alum. 30 Degree Elbow Aluminum Stop Bracket w/ Rubber Bumper Spring Underbody Assembly Drivers side Spring Underbody Assembly Passenger Side Spring Underbody Assembly Drivers Side Spring Underbody Assembly Passenger Side 16

3 MOUNTING THE TARP SPOOL MOUNTING BRACKETS 1) Mount the two supplied TARP SPOOL MOUNTING BRACKETS (#2) on the exterior, and as far forward as possible, of the dump box. (See the picture on left for an explanation). Drill the two mounting bracket holes 13/4 down from the top edge of the box. 2) Use the supplied 1/2" x 1 bolts (#13) & 1/2" nuts (#14) for attaching the TARP SPOOL MOUNTING BRACKET (#2). The RUBBER BUMPERS (#9) should face towards the rear of the truck. MOUNTING THE MOTOR INSTALLING THE TARP AXLE 1) Measure the distance between the two TARP SPOOL MOUNTING BRACKETS (#2). Verify that the TARP AXLE (#7) is 1-inch shorter than this length. If the TARP AXLE (#7) is too long, cut it to the correct length then redrill a 5/16 hole ½ from the end. 2) Slide the Spool Shaft (#8) into the TARP AXLE (#7) and secure with a 5/16 x 2-1/4 bolt (#12) & 5/16 nut (#11). 3) Slide the TARP AXLE (#7) into the US TARP SLIM MOTOR (#3) shaft and secure with a 5/16 x 2-1/4 bolt (#12) & 5/16 nut (#11). 4) Install the AXLE BEARING WITH FLANGE (#6) to the Outside of the TARP SPOOL MOUNTING BRACKET (#2) on the passenger side of the truck. Use the two supplied 5/16 x 7/8 bolts (#10) & 5/16 nuts (#11) for mounting. 1) Mount the US TARP SLIM MOTOR (#3) to the TARP SPOOL MOUNTING BRACKET on the driver s side. Be sure to sandwich the CHROME MOTOR COVER PLATE (#4) between the US TARP SLIM MOTOR (#3) and the TARP SPOOL MOUNTING BRACKET (#2) as shown above. Use the three supplied 5/16 x 3/4" grade 5 bolts (#17) for mounting the US Tarp Motor. 2) DO NOT INSTALL THE CROME COVER AT THIS TIME. Wind Deflector INSTALLING THE WIND DEFLECTOR 1) Install the optional WIND DEFLECTOR (#1) by first verify that the length is correct to fit between the two TARP SPOOL MOUNTING BRACKETS (#2). If the WIND DEFLECTOR (#1) is too long, cut it to the correct length. 2) Attach the WIND DEFLECTOR (#1) to the TARP SPOOL MOUNTING BRACKETS (#2) using the six supplied 5/16-18x1-1/4 Zinc Indent Hx Wash SlotT-23 Thread Cutting Screw (#18).

4 Wiring The Motor & Rotary Switch 1) Run the DUAL CONDUCTOR WIRE from the US Tarp MOTOR (#3) down the front of the dump box, along the bottom of the box, around the hinge, and along the frame rail to the SWITCH BRACKET inside the cab. ***Be sure to not bind or pinch the wire.*** 2) Run another section piece of the DUAL CONDUCTOR WIRE from the Battery to the SWITCH BRACKET. 3) Connect the DUAL CONDUCTOR WIRE as shown above to the US Tarp Motor, Switch, circuit breakers, and battery. 4) Mount the supplied SWITCH BRACKET inside the cab using the two mounting holes and the necessary screws or bolts (these are not provided). 5) After connecting all wires, check to see that when the switch is turned to wind-up the tarp the TARP AXLE turns counter-clockwise when viewing it from the driver s side of the truck. If not, switch the two wires on the US TARP MOTOR. 6) After testing the Electrical to make sure it is wired correctly, attach the CHROME MOTOR COVER to the MOTOR COVER PLATE using the seven supplied screw and rubber grommets. Upgrade your System US Tarp offers many options to upgrade or optimize your tarp system. Switching to the US TARP EZ SWITCH allows the operator the ease of a rocker switch along with the system preserving EZ RELAY. The Newest addition to our Universal Tarp Motor family is the Heavy Duty 90:1 Tarp Motor. Rated for Tarpaulins up to 42 feet in length. This is one of the strongest motors in the industry. To view these optional upgrades along with many others visit

5 Mounting your US Tarp System FINDING THE PIVOT POINT 1) This is done best using two tape measures. It is possible to use only one tape measure, but will take some additional time. 2)Have one person use a tape measure to measure distance from the TARP AXLE to an approximate PIVOT POINT location on the side rail. 3)Have a second person use another tape measure to measure the distance from the FRONT EDGE OF THE TAILGATE to the same approximate PIVOT POINT. 4)The actual PIVOT POINT is where the two tape measures cross and the measurements are equal. Mark the place where this happens. Mounting the Spring Assembly 1) The SPRING ASSEMBLY can either be mounted under the box or bottom rail, or the front plate on the spring assembly can be removed and the SPRING ASSEMBLY can be mounted through the box or bottom rail. If the SPRING ASSEMBLY is mounted through the box or bottom rail a 1-1/8 diameter hole will need to be drilled for the shaft. 2) Position the SPRING ASSEMBLY over the mark created and mark the four mounting holes for drilling. 3) Mount the SPRING ASSEMBLY labeled with a D on the driver s side of the box and mount the SPRING ASSEMBLY labeled with a P on the passenger s side of the box. Use the supplied 3/8 x 1 bolts, washer & nut to attach to the box. 4) Attach the other SPRING ASSEMBLY in the same location on the other side of the dump body. ATTACHING THE LOWER ARMS 1) On the driver s side of the box turn the shaft on the SPRING ASSEMBLY by hand in the counter-clockwise direction to the point where the shaft engages with the spring. 2) Mount the PIVOT CASTING (#3) to the SPRING ASSEMBLY with the PIVOT CASTING pointing to the rear of the box. Attach the PIVOT CASTING using the supplied ¼ x 2-1/2 Bolt and Nut. 3) With the PIVOT CASTING pointing to the rear of the dump box, slide the LOWER ARM on to the PIVOT CASTING. Use two of the supplied 5/16 x 1-1/4 Bolts to attach the LOWER ARM to the PIVOT CASTING. 4) Follow steps 1,2 & 3 above for the passenger s side of the dump box EXCEPT turn the shaft in the clockwise direction. ATTACHING THE UPPER SIDE ARMS 1) Slide ONE of the SIDE ARMS into one of the LOWER ARMS and lay it on the ground. DO NOT bolt the UPPER ARM and the LOWER STEEL ARMS together yet. 2) Attach the CROSS TUBE to the SIDE ARM mounted on the truck and lie the CROSS TUBE on the ground behind the truck. Use the supplied 5/16 x 1-3/4 Bolt and Nut. 3) Slide two of the PLASTIC TARP CENTERING FLANGES on to the CROSS TUBE. 4) Slide the pocket end of the TARP on to the CROSS TUBE. 5) Slide the remaining two PLASTIC TARP CENTERING FLANGES on to the CROSS TUBE. 6) Slide the other SIDE ARM into one other LOWER STEEL ARM and attach it to the CROSS TUBE. If the CROSS TUBE is too long, it will need to be cut to the desired length. 7) Swing the TARP ARM assembly from the ground to the top edge of the rear of the dump box. 8) Make sure the CROSS TUBE rests in the desired location, and attach the SIDE ARMS to the LOWER ARMS (#2) using the supplied 1/2 x 3/4 bolts.

6 Attaching the Tarpaulin Bring the free end of the TARP to the front of the truck to attach the Tarp to the TARP AXLE: 1) Tarps with Grommets on the front edge can also be mounted by sliding the 1/4-20 x 3/4" Zinc Plated Carriage Bolt in the correct slot and then screw together using 1/4" x 1" Zinc Plated Fender Washer 1/4" Nylock Nut before attaching the end caps Final Steps Operate the tarping system and adjust the position of the PLASTIC TARP CENTERING FLANGES on the CROSS TUBE so that the CROSS TUBE (#6) does not rest on the top edge of the box. Also, make sure the PLASTIC TARP CENTERING FLANGES (#14) hit the rubber bumpers on the spool. (Optional Heavy duty Tarp Axle see Top Left Picture; Hollow 103 Tarp Axle see Bottom Left Picture) Commonly Asked Questions. Q: My Motor is not working? A: Disconnect the motor from the Rotary Switch. Use a 12V Power Source (Car battery/charger) Connect the Motor to the Positive + and Negative Terminals. If the motor begins the turn the problem is in the wiring to the Rotary Switch. Be sure to double check your wire connections going to Rotary Switch. Q: My Motor is turning the wrong direction A: Disconnect Positive + and Negative wires from Motor Terminals and switch them around. This will correct the direction of spin of the motor. Q: I think I have too much tension in the springs? A: US Tarp Torsion Springs are designed for Universal use. The problem is rarely the springs. The correction to this problem would be the gearing ratio in your motor. Each motor is rated for certain lengths. If you use a smaller motor than recommended you will Encounter problem with the tarp being spooled up. Be sure to check your motor size and see what Length of tarpaulin system it is rated for. Q: Is there a way to see a system being installed? A: Yes, US Tarp has a Youtube channel that is ever growing. We have everything from part reviews To system installations. We try to update our channel at least once every few weeks. If you need Further Assistance. Please visit Call Toll Free Contact & Connect with us Toll Free: sales@ustarp.com Our Friendly Customer Service Representatives will gladly assist you with any problems or issues you may encounter.