Installation Instructions - Steel Spring Arm Kits 50-0709, 50-079, 50-0750, 50-075, 50-078 GR 8// 07-00 0 N. Marshall Ave. El Cajon CA. 900 For technical support call us at (800) 8-075
Step. Determining the Pivot Points and Mounting Locations on each side Careful measurement must be taken to insure that the arm and pivot assemblies are mounted square and parallel to the truck or trailer body. Locate the proper mounting positions by determining Point A and Point B and insuring measurement D and E are equal (Fig. ) Point C must be located as low as possible and be the same on both sides. Fig. Step. Arm Preload Install Arm and Pivot assemblies with Arm indexed as shown in Fig. Arms must be indexed with no spring load on pivots. Index Arm at 80 degrees of travel from the Roller Mechanism for proper preload of the spring. The dotted lines represent proper 80 degree preload position for applications with Bent Arms. Mark pivot pin location on box. Fig. Point A Point B 80 o 80 o D Point C E Step. Mounting the Pivot Locate the Pivot pin with marks made in step. Bolt or weld in place (Fig. ). Fig. Fig. Step. Pivot and Spring Assembly Assemble the springs and pivot assembly as shown in Fig.. Make sure assembly moves freely. Weld or bolt in place Front of Truck Pivot Center Point C Page
Step 5a. Correct Alignment of arm to truck. Arms and pivots must be square and parrallel to truck (Fig. 5a). Fig. 5a A Dimension A must equal B Dimension C must equal D Dimension E must equal F Step 5b. Adjust the Arms on both sides to be the same length. Fig. 5b Equal Distance on Both Sides C E F B D Step. Tarp Installation Slide Tarp into Groove on roller tube and center (Fig. ). Fig. Step 7. Installing The Pull Bar. Cut the pull bar to length making sure the arms remain parallel and square to the body. Slide the tarp into groove in the pull bar and center the tarp. Fig. 8 Fig. 7 Roll the tarp up on the pull bar two revolutions. Fig. 7 Fasten the tarp in place by sliding the two urethane bumpers on to the pull bar far enough to touch the edges of the tarp. Lock in place by installing a / long (50-99) self drilling screw through the bumper and into the hem tube groove of the pull bar. (Fig. 8) Urethane Bumper Elbow Assembly 50-99 Center Note: Tarp must be retracted when dumping. Page
Step 9. Optional Flap Tarp, Rope and Hook Installation Fig. 9 Parts: Tie Down Hooks (Steel or Alum.) Pull Down Hook The Location Of The Tie Down Hooks Is Critical! Flip the braided rope over the corner so that the flaps and tie down ropes hang over each side of the box. The number of tie down hooks vary depending on the length of your tarp. One pull down hook is included with your Pulltarp system. If needed. Use the hook to pull the braided rope and flaps over the side of the box. Fig. 0 The tie down hooks must be positioned so that: a. The tie down rope can be reached from the ground. b. The bungee cord has to be stretched to reach the last hook (see step 0). c. The rope has no slack. d. The tie down hooks are level with one another. To ensure proper hook placement, first duct tape the rope to the box in place of the tie down hooks. Start with hook closest to the cab.. Position the first hook (5.cm) down and (0.8cm) forward (toward the cab) from the first grommet (Fig.9).. Position nd hook straight down from st grommet. This hook should be reached from ground (Fig.0).. Place middle hooks equal distances from grommet (Fig.). These hooks should be placed at the same height as the second hook.. Position last hook (closest to the tailgate) below the last grommet at the same height as the others (Fig.). 5. Weld hooks in place. Fig. CORRECT Fig. INCORRECT Page
Step 0. Bungee Cord Installation After side hooks are installed, the tie down rope must be installed and cut to proper length. It is important to get all of the slack out of the rope to prevent blowing and rubbing of flaps in windy conditions. Parts: Bungee Cords, Oval Compression sleeves, Snap Clip Tarps with Tie Downs To tighten, pull loose end of rope through the Oval Compression Sleeve (Fig.. Stretch the bungee cord making sure all slack is taken out of the rope, crimp compression sleeve (Fig.). Fig. Fig. Connect Bungee Cord to Rope. Thread braided rope through Oval Compression Sleeve.. Feed rope through the eye of the bungee cord.. Thread the rope back through the oval compression sleeve. Adjust for proper length. Crimp compression sleeve. Tarps with Side Flaps To tighten, pull loose end of rope through the Oval Compression Sleeve (Fig.5). Stretch the bungee cord making sure all slack is taken out of the rope, crimp compression sleeve (Fig. ). Note: Check for proper placement of rope through the last two hooks. Fig.5 Fig.... Snap Clip installation Flip the rope back on top of the tarp, making sure to hold the bungee at all times. The first snap clip is factory installed 5 - from the pullrod. Open the clip and enclose the rope. Weave the second clip through the main pullrope where the ends of the bungee cords meet the main pullrope. Make sure the rope is taught when clipped. NOTE: First snap clip should not be used on long wheel base belly dumps. Excess Rope You may need extra rope to keep the side flap system ground operated. If your application requires extra rope, the slack needs to be taken up by attaching the end of the bungee cord to an alternate hook. (pictured below) nd Snap Clip st Snap Clip Top View Page
Step. Flap / Tie Down Rope Placement and Installation (Fig. 7). Fig. 7 System Housing Step. Rope Hook Placement Weld rope storage hook on the top of the arms approx. apart (Fig. 8 Fig. 8 Tarp Flaps Arm Hook Placement On Arms Step. Rope Hook Placement For Aluminum Arms Use Self Drilling screws (part #50-99) to install Hooks (Fig. 9)) Fig. 9 Storage Hooks Bungee Cord Arm Hook Placement on Arms Fig. 0 Flap/Tie Down Ropes Arm Rope Storage On Arms Page 5
Option #. Plug Assembly - Part # 5-0505 Assemble the Quick Disconnect as shown in Fig. and Fig.. Option #. Plug Assembly - Part # 5-050 Fig. Fig. Wire Pin Connector Spring Tab Fig. Page
STEEL ARMS TO ' # 50-0709, 50-079, 50-0750, 50-075, 50-078 0 " 7 9 5 " 5 " " 9.50" 8 9 0 " 8 5 77" ILLUSTRATION VIEW SHOWN LOOKING FROM PASSENGER SIDE TO REAR OF VEHICLE. ARM OPTIONS ITEM PART# DESCRIPTION QTY ITEM PART# DESCRIPTION 50-0 STEEL UPPER ARM TUBING 8 50-05 UPPER ARM TUBING, DRILLED AND BENT 50-9 50-5 TEAR DROP BUMPER KIT ELBOW KIT (FOR STEEL) 9 0 50-07 50-0 OFFSET UPPER ARM TUBE UPPER ARM BENT EXTENSION-5 50-0 -SPRING HOUSING-DRIVER SIDE 5 50-0 -SPRING HOUSING-PASSENGER SIDE GR REV. 8// 50-00 UNIVERSAL TEAR DROP PULLROD 7 50-5008 / - x / SET SCREW QTY Page 7
-SPRING HOUSING ASSEMBLY 5 (# 50-0 LEFT) OPPOSITE (# 50-0 RIGHT) SHOWN ITEM PART# DESCRIPTION QTY 50-50-0 50-50-00 PIVOT ASSEMBLY, -SPRING ARM SYSTEM -SPRING SIDE PLATE ASSEMBLY WASHER, 7/8" x /" NARROW RIM /" SNAP RING 5 50-5008 57-99 / - x / SET SCREW SMALL SPRING FOR ARM SYSTEM BAB REV. //08 Page 8